Metallic materials and material fatigue
Welcome to the Department of Metallic Materials and Material Fatigue.
The focus of our department is research into the interactions between the Manufacturing and processing process the Microstructure and the resulting Properties of a material (mechanical, corrosive, tribological). Understanding these interactions enables the material to be designed specifically for the application in question.
The microstructural and mechanical characterisation of the material and in particular the Material behaviour under cyclic loading and under the influence of hydrogen supported by Simulation , form the basis for this. The range of materials we have investigated focuses primarily on metallic materials, particularly steels, aluminium alloys and high- and medium-melting-point alloys . Our expertise also lies in the area of Fatigue of anodic, plasma-electrolytic and thermally sprayed coating systems .
Our department conducts research into the process-structure-property relationships of metallic materials with a view to their functionalisation for practical applications. These include, in particular:
- Fatigue, crack propagation and damage behaviour
- The influence of microstructure on the mechanical, corrosion and tribological properties of materials
- Relationships between the manufacturing or processing process and the resulting microstructure /li>
- Microstructural and mechanical properties of highly plastically deformed, conversion-treated (anodic, plasma-electrolytic) and coated materials
- Qualification of metallic foils for bipolar plates in electrolysers and fuel cell stacks
- Modelling of material and surface changes in hot forming processes
Do you have any further questions, or is there anything we can do to help you with your work? If so, please feel free to contact us using the telephone number or email address below.
We look forward to a Let’s work together!
2026
Department(s):
Metallic materials and material fatigue
Funding organisations:
DFG
Funding reference number:
565494670
Running time:
2026–2028
Motivation & Objectives
Electromagnetic forming (EMF) utilises the energy density of pulsed magnetic fields to apply force without contact and to carry out high-speed forming of highly electrically conductive workpieces. The high strain rates inherent to the process result in increased formability for many materials, enabling the forming of complex geometric features. Due to the combination of high mechanical strength and high electrical conductivity, copper alloys such as CuCrZr are now predominantly used as inductor materials in the EMU process. However, the resource-efficient and cost-effective design of the forming process is currently limited by the highly variable service life of the inductor. Despite numerous studies on electromagnetic forming, the mechanisms that lead to damage to the inductor—sometimes after just a few discharges—remain unclear to this day. In order to optimally design the inductor for the process and ensure the stability of its operational properties for a long service life, an understanding of the underlying process-structure-property relationships is necessary. As part of this project, the causal relationships between the inductor’s material microstructure—which directly influences its mechanical and electrical properties—its geometry and surface condition, as well as between the process parameters and the associated electro-thermo-mechanical stresses on the inductor, in order to gain a fundamental understanding of the damage processes and mechanisms occurring during EMU. Through the qualitative and quantitative evaluation of these influencing factors, conclusions can be drawn regarding the potential extension of the service life of the inductors, thereby ensuring a resource-efficient and cost-effective design of the forming process.
Contact person
M.Sc.
Lukas Böttger
Department:
Metallic materials and material fatigue
Function:
research associate
Phone:
+49 (0)371 531 –
34425
EMail:
lukas.boettger@…
Room:
E06.004
Department(s):
Metallic materials and material fatigue
Funding organisations:
BMWE IGF
Funding reference number:
01IF24804N
Running time:
2026–2028
Motivation & Objectives
The project investigates the potential applications of microwave plasma torches in thermal processing systems and compares them with conventional hydrogen and natural gas burners. To this end, a wide range of process parameters – such as feed gases, temperatures and mixtures – are systematically varied in order to investigate in detail the effect of microwave plasma torches on furnace construction materials. Based on these findings regarding plasma properties, the integrity of the burner components and process safety, recommendations can then be derived for the use of microwave plasma torches in existing and new thermal processing plants.
Contact person
M.Sc.
Franz Gläser
Department:
Metallic materials and material fatigue
Function:
research associate
Phone:
+49 (0)371 531 –
39798
EMail:
franz.glaeser@mb…
Room:
E06.004
2025
Department(s):
Chemical and Electrolytic Surface Treatment, Metallic Materials and Material Fatigue
Funding organisations:
DFG
Funding reference number:
547149748
Running time:
2025–2028
Motivation & Objectives
Meeting the growing demands in surface engineering – such as selectively hardening surfaces, for example through plasma nitriding, and precisely determining the necessary process controls – requires not only an in-depth understanding of the process but also extensive process development. To reduce the amount of experimental work required for this, numerical, model-based simulations are increasingly being used. However, state-of-the-art methods only allow plasma nitriding to be simulated under certain simplifications. Modern developments in mathematical modelling, information technology and mathematical algorithms enable the analysis of complex models with a high degree of precision. The project involves incorporating the effects of nitrogen and carbon contents – specifically their displacement mechanisms and solubility limits – on the phase transformations during plasma nitriding. In addition to mathematical modelling, the inverse calculation of the physical model parameters from plasma-nitrided layers is also a key part of the project. For the simulation, highly stable numerical methods developed in recent years are being put into practice.
Contact person
M.Sc.
Stephan Daniel Schwöbel
Department:
Electroplating and chemical coating technology
Function:
research associate
Phone:
+49 (0)371 531 –
36100
EMail:
stephan-daniel.schwoebel@mb…
Room:
E06.104
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
Department(s):
Metallic materials and material fatigue
Funding organisations:
BMWE IGF
Funding reference number:
01IF23541N
Running time:
2025–2027
Motivation & Objectives
The aim of the project is to determine and predict the influence of hydrogen addition in thermal processing plants on the mechanical properties and service lives of heat-resistant steels under combined thermochemical and cyclic mechanical loading, under conditions relevant to industrial applications. The results of these investigations are made available to plant manufacturers, service providers and materials suppliers. The data provide evidence of the corrosion behaviour and mechanical strengths of the materials used and their joint zones under the altered conditions of hydrogen combustion. This enables companies in the sector – particularly SMEs – to design future plants more precisely and to adapt existing plants in a targeted manner for use with hydrogen. The insights gained allow for the extension of costly maintenance intervals and the avoidance of unplanned plant outages. The aim is to ensure that the use of these materials in industrial systems fuelled by hydrogen is reliable, efficient and safe, thereby facilitating the transition to a low-carbon and sustainable energy supply.
Contact person
M.Sc.
Lisa-Marie Rymer
Department:
Metallic materials and material fatigue
Function:
research associate
Phone:
+49 (0)371 531 –
37902
EMail:
lisa-marie.rymer@mb…
Room:
E06.003
Sub-project:
Influence of near-surface microstructure components and their geometric properties on the alternating strength
Department(s):
Metallic materials and material fatigue
Funding organisations:
DFG
Funding reference number:
547640565
Running time:
2025–2027
Motivation & Objectives
Many components have to withstand periodic load changes during their life cycle. Of great technical and economic interest are long service lives with high bearable loads. For components subjected to this type of cyclic loading, it is necessary to select materials and adapt the geometric design with regard to high realisable fatigue strengths. Application-specific, specified minimum vibration cycles must be endured without cracks. As the component surface is the favoured location for crack initiation under high cycle fatigue (HCF) loading, the geometric and material properties have a decisive influence on the cyclic load capacity and therefore the fatigue strength. This means that in addition to strength, hardness and the macroscopic surface topography, the notch effects resulting from the microstructure components also have an influence on the microscale. However, these microstructure-based influencing factors have not yet been sufficiently researched in terms of their effect on fatigue strength. The aim of the project is to record the influence of the near-surface microstructure on the fatigue strength not only qualitatively but also quantitatively in comparison to the macroscopic, production-related surface topography in order to be able to take all relevant factors into account when designing a component for improved application properties.
Contact person
M.Sc.
Sahib Kaur
Department:
Metallic materials and material fatigue
Function:
research associate
Phone:
+49 (0)371 531 –
31556
EMail:
sahib.kaur@mb…
Room:
E06.017
Department(s):
Metallic materials and material fatigue
Funding organisations:
SAB ERDF
Funding reference number:
100757078
Running time:
2025–2026
Motivation & Objectives
The ‘FerriKo-EL’ project is investigating the use of cost-effective and resource-efficient ferritic stainless steels for water electrolysis. Compared with the commonly used austenitic steels with a high nickel content, ferritic steels are based on chromium as the main alloying element, which is significantly cheaper and more sustainable. At the same time, the absence of nickel results in reduced formability and corrosion resistance, which has so far limited their use to flat – and therefore less efficient – flow field structures. Furthermore, without suitable surface treatment, the aggressive media and high electrical voltages in electrolysers lead to accelerated degradation of the steels.
Studies have shown that the chromium content in ferritic steels allows the formation of self-passivating layers with very high corrosion resistance whilst maintaining sufficient electrical conductivity. The aim of FerriKo-EL is to systematically investigate this approach and apply it to ferritic electrolyser plates. To this end, the surfaces of the plates are specifically treated or coated using various methods in order to optimise the formation of protective coating systems. In parallel, tailored forming strategies are being developed to significantly improve the formability of the materials and enable the production of flow fields with deeper channel structures. This allows the performance and efficiency of the novel electrolyser plates to be significantly increased. Through the combination of materials development and advanced process design, FerriKo-EL makes a significant contribution to reducing costs, increasing efficiency and ensuring the sustainable production of hydrogen as part of the energy transition.
Studies have shown that the chromium content in ferritic steels allows the formation of self-passivating layers with very high corrosion resistance whilst maintaining sufficient electrical conductivity. The aim of FerriKo-EL is to systematically investigate this approach and apply it to ferritic electrolyser plates. To this end, the surfaces of the plates are specifically treated or coated using various methods in order to optimise the formation of protective coating systems. In parallel, tailored forming strategies are being developed to significantly improve the formability of the materials and enable the production of flow fields with deeper channel structures. This allows the performance and efficiency of the novel electrolyser plates to be significantly increased. Through the combination of materials development and advanced process design, FerriKo-EL makes a significant contribution to reducing costs, increasing efficiency and ensuring the sustainable production of hydrogen as part of the energy transition.
Contact person
M.Sc.
Linto George Thomas
Department:
Metallic materials and material fatigue
Function:
research associate
Phone:
+49 (0)371 531 –
37893
EMail:
linto.george-thomas@mb…
Room:
E06.018
Department(s):
Metallic materials and material fatigue
Funding organisations:
BMWE
Funding reference number:
03EN2135A
Running time:
2025–2028
Motivation & Objectives
The project aims to reduce scale formation on metals, such as steel and copper, within the hot rolling process chain, with a view to conserving resources and reducing CO₂ emissions. This is achieved by combining experimental investigations with simulation-based predictions of scale formation within hot forming process chains. These approaches are intended to reduce scale formation whilst maintaining component quality and to make scale removal measures more efficient. As over 90 per cent of copper and steel products manufactured worldwide are hot-formed, the project offers considerable potential for savings in terms of more efficient use of resources and energy, provided the set objectives are successfully achieved. The development of an AI-supported forecasting tool to map the heating and descaling stages is the primary means of achieving these objectives. The training data on which the forecasting tool is based is generated through laboratory tests and the modelling of hot forming process chains. To model scale formation, specially developed subroutines are created within established hot forming simulation programmes. These models are then validated in an industrial setting. This enables the prediction tool to be provided with extensive training datasets to identify correlations between the process variables and scale growth, as well as scale properties. This enables the industrial partners to identify energy-saving potential during heating, descaling and hot forming in a time- and cost-efficient manner. Consequently, the successful implementation of the prediction tool into existing furnace control and descaling programmes enables the project partners to design their hot forming process chains in a way that conserves resources and reduces energy consumption.
Contact person
M.Sc.
Nayeem Siddique
Department:
Metallic materials and material fatigue
Function:
research associate
Phone:
+49 (0)371 531 –
33877
EMail:
md-nayeem-islam.siddique@mb…
Room:
E06.004
2024
Department(s):
Metallic materials and material fatigue
Funding organisations:
DFG
Funding reference number:
531872765
Running time:
2024–2026
Motivation & Objectives
The incremental sheet metal forming (ISF) process offers the possibility of manufacturing components in small batch sizes in a cost-effective manner that meets specific requirements. The in-service behaviour of manufactured components is largely determined by the prevailing residual stress state. The aim of the research project is to improve the in-service behaviour of incrementally formed high-strength components by specifically controlling the residual stress state during the industrial manufacturing process. The residual stresses are introduced locally into the workpiece through the process control of incremental sheet metal forming in order to improve the component properties. In the transfer project with Faurecia Autositze GmbH, the findings are being applied to meet industrial requirements. To this end, the range of materials analysed to date is being extended to include high-strength dual-phase steels for industrial use, and application-specific geometries are being selected. In addition to component performance under static and cyclic loading, the focus is on the geometric accuracy of the manufactured components. To introduce additional compressive residual stresses close to the surface and reduce the process force, a concept involving oscillating die movement is being tested. A reduction in process time is expected to be achieved through the simultaneous use of several forming dies.
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
2022
Sub-project:
TP1: Wear, corrosion and fatigue behaviour of HGSS functional surfaces
Department(s):
Metallic materials and material fatigue
Funding organisations:
German Research Foundation
Funding reference number:
460484491
Running time:
2022–2026
Motivation & Objectives
Cut surfaces produced by high-speed shear cutting (HGSS) may contain adiabatic shear bands (ASB), depending on the material and the selected process parameters. These are homogeneous zones that are clearly distinguished from the base material in terms of microstructure and exhibit a property profile that differs significantly from that of the surrounding material. However, the structure-property relationships of HGSS cut surfaces have so far remained largely unexplored. Sub-project 1 therefore focuses on providing a scientifically sound answer to the question of how HGSS cut surfaces behave under tribological, corrosive and cyclic mechanical loading. This is directly linked to the need to gain a fundamental understanding of the mechanisms at work and, consequently, to identify the relationships between process, microstructure and properties. A prerequisite for this is the interpretation – to be carried out in consultation with the research group partners – of the results of the wear, corrosion and fatigue tests, as well as the residual stress analysis; that is, the correlation of the determined cross-sectional properties with the process parameters and the resulting microstructure. The research results achieved in WP1 form the basis for the evaluation of the service properties and thus the practical suitability of HGSS cross-sections. Through feedback with the other sub-projects, the results also enable direct influence on the design of the HGSS process and thus the targeted adjustment of the properties of the functional surface.
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
2022
Department(s):
Metallic materials and material fatigue
Funding organisations:
German Research Foundation
Funding reference number:
316273316
Running time:
2022–2023
Motivation & Objectives
For years, process and materials development has also been carried out to a large extent virtually, thereby saving important resources (e.g. materials, energy, time, etc.). To improve the accuracy of calculations, it is essential to determine real material data in a manner appropriate to the process and, ideally, to describe it mathematically. Analytical or semi-physical models are well-suited for this purpose when combined with FEM-based process simulation. In addition to the base material, material loss in the form of oxides (up to 2 per cent of the initial mass in steel applications) is a crucial factor, particularly in hot forming processes and, more specifically, in hot forging processes, and influences process control in several ways (temperature distribution, friction conditions, tool wear). For this reason, these surface changes—which depend on the base material—and their behaviour during the heating and forming processes are now also of great interest, as the flow of material develops in a non-stationary manner due to varying friction conditions, but also due to the insulating effect of scale. In this follow-up proposal, the focus is on scale behaviour and failure during heating and the subsequent die forging, with a detailed description of its thermal and mechanical properties. Only in this way can the surface changes resulting from complex stress states within a real forming process, as well as their influence on the tribosystem, be described numerically and calibrated against the actual experiments.
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
Department(s):
Metallic materials and material fatigue
Funding organisations:
German Research Foundation
Funding reference number:
468469638
Running time:
2022–2024
Motivation & Objectives
In over 90 per cent of cases, cyclic loading is the cause of failure in structural components. Alongside fatigue strength, crack propagation resistance is of crucial importance for the technical applicability of a material. In order to further develop materials, it is necessary to intervene conceptually in the microstructure. However, in conventional alloys with a base element that determines their properties, this approach is increasingly reaching its limits. The situation is different for high-entropy (HEA) and medium-entropy (MEA) alloys, whose development potential remains largely untapped. The MEA CrCoNi represents a promising example of this alloy concept for applications under cyclic loading, as it is characterised by a high crack propagation threshold. This is significantly influenced by the chemical composition of the alloy as well as by the targeted introduction of microstructural defects. The latter method, in particular, allows the microstructure of a material to be tailored to the specific application. The research therefore focuses on controlling the microstructure in the CrCoNi system using high-degree-of-plasticity forming in combination with a heat treatment route tailored to this process. The aim is to identify microstructural elements relevant to material properties that influence the threshold value and to assess their influence in relation to their proportion in the microstructure. This enables the investigation of microstructural elements such as twinning, grain size and their distribution, as well as their interaction with other lattice defects, such as stacking faults, in terms of their effect on the crack propagation threshold. In particular, the effect of twins is to be investigated, as they play a key role in the development of fatigue-resistant materials.
Contact person
M.Sc.
Lisa-Marie Rymer
Department:
Metallic materials and material fatigue
Function:
research associate
Phone:
+49 (0)371 531 –
37902
EMail:
lisa-marie.rymer@mb…
Room:
E06.003
Department(s):
Metallic materials and material fatigue
Funding organisations:
IGF AiF
Funding reference number:
IGF 22509 BR/2
Running time:
2022–2023
Motivation & Objectives
The energy transition is a cornerstone of a sustainable and climate-neutral future. Hydrogen technologies, particularly fuel cells, play a key role in this, as they enable high efficiency, short refuelling times and long ranges. A key component of the fuel cell is the bipolar plate (BPP), which ensures the distribution of reaction gases and the removal of electricity, heat and water. However, widespread adoption is currently limited by high system costs, with the BPP accounting for a significant proportion of these costs.
A promising approach to improving cost-effectiveness is to reduce the film thickness of metallic BPPs from the current level of around 100 µm to 50–75 µm. This enables savings in material and weight, a higher power density, and more compact flux field structures. However, the forming of ultra-thin foils presents a considerable challenge. At thicknesses of ≤ 75 µm, localised thinning and crack formation occur more frequently, which cannot be adequately predicted using conventional mechanical models. The microstructure, in particular the ratio of grain size to foil thickness, plays a decisive role in this regard.
The aim of the project is to develop a methodology for the qualification of metallic foils for the production of ultra-thin BPP. To this end, thin foils are selectively recrystallised in order to create suitable microstructures and improve formability. On this basis, flow field geometries are designed numerically, manufactured and experimentally validated under conditions close to those encountered in practice.
By combining materials science and forming technology, the aim is to significantly improve process reliability when processing ultra-thin films. This enables the production of lighter and more efficient fuel cells and contributes significantly to reducing costs and further developing sustainable hydrogen technologies.
A promising approach to improving cost-effectiveness is to reduce the film thickness of metallic BPPs from the current level of around 100 µm to 50–75 µm. This enables savings in material and weight, a higher power density, and more compact flux field structures. However, the forming of ultra-thin foils presents a considerable challenge. At thicknesses of ≤ 75 µm, localised thinning and crack formation occur more frequently, which cannot be adequately predicted using conventional mechanical models. The microstructure, in particular the ratio of grain size to foil thickness, plays a decisive role in this regard.
The aim of the project is to develop a methodology for the qualification of metallic foils for the production of ultra-thin BPP. To this end, thin foils are selectively recrystallised in order to create suitable microstructures and improve formability. On this basis, flow field geometries are designed numerically, manufactured and experimentally validated under conditions close to those encountered in practice.
By combining materials science and forming technology, the aim is to significantly improve process reliability when processing ultra-thin films. This enables the production of lighter and more efficient fuel cells and contributes significantly to reducing costs and further developing sustainable hydrogen technologies.
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
Department(s):
Metallic materials and material fatigue
Funding organisations:
BMWE PTJ
Funding reference number:
03EN4022A
Running time:
2022–2023
Motivation & Objectives
The main objective of the project is to develop a simulation-based process chain optimisation approach to save energy and resources in energy-intensive processes, and to increase the level of digitalisation by integrating the necessary process models. To this end, the various process chains will be optimised through the use and further development of simulation software for primary forming and secondary forming, thereby reducing costly energy inputs and scrap, in order to realise significant energy-saving potential and substantially reduce the CO₂ emissions generated during production. Initially, commercial simulation software will be used to visualise the existing primary and subsequent forming processes, with a view to combining the simulation approaches that currently exist largely in isolation (“silo solutions”). Measurement results from laboratory and field trials, together with the calibrated simulation results, will be used jointly to identify optimisation potential across all process steps. These include, in particular, energy savings in the areas of heat treatment and forming, as well as the targeted reduction in the scrap rate. At the end of the project, further-developed simulation programmes will be made available on the market to enable the modelling of such integrated processes. Furthermore, a modelling strategy is being developed to enable these strategies to be transferred to other materials or related processes. In addition, process maps are being developed for various forming and shaping processes and a broad range of materials, incorporating the optimised strategies to reduce energy consumption and scrap rates.
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
Department(s):
Metallic materials and material fatigue
Funding organisations:
DFG
Funding reference number:
372803376
Running time:
2022–2024
Motivation & Objectives
The incremental sheet metal forming (ISF) process offers the possibility of manufacturing components in small batch sizes in a cost-effective manner that meets specific requirements. The in-service behaviour is largely determined by the residual stress state prevailing within the component. The aim of the research project is to improve the service behaviour of incrementally formed components through the targeted adjustment of the residual stress state. The residual stresses are introduced into the workpiece in a locally defined manner through the process control of incremental sheet metal forming. During the first funding period, it was demonstrated that the process parameters of incremental sheet metal forming directly influence the forming mechanisms of bending, shearing and normal stress, and affect the magnitude and sign of the residual stresses. The second funding period focuses on verifying the achievable improvement in the properties of components produced by forming techniques through the introduction of residual stresses. In this context, process extensions are being considered that enable the intensification or sign reversal of the residual stresses. The third project phase focuses on the predictability of property improvements for the operation of the components, as well as the stability of residual stresses under specific operating conditions during continuous operation and in corrosive environments. The findings obtained will enable the design and manufacture of components tailored to specific requirements.
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
2020
Department(s):
Metallic materials and material fatigue
Funding organisations:
German Research Foundation
Funding reference number:
435265960
Running time:
2020–2022
Motivation & Objectives
Electrochemical conversion treatments, such as anodic or plasma-electrolytic oxidation, are an effective means of improving the corrosion and wear resistance of aluminium alloys. The type of conversion coating, with its respective structure and properties, has a direct influence on fatigue strength and the failure mechanisms under cyclic loading. This complex relationship between the adjustable system comprising the ‘substrate with an anodic/plasma-electrolytic coating’ and the fatigue properties is not yet fully understood. The aim of the proposed research project is to gain a comprehensive understanding of the effect of substrate and coating microstructure, coating thickness, as well as work hardening of the substrate surface and post-treatment of the conversion coatings, on fatigue strength in the HCF range and the mechanisms of coating damage. The focus is on fundamental insights into the relationships between a conversion coating, its microstructural properties and residual stresses, and its cyclic load-bearing capacity, crack initiation and crack propagation from the coating into the substrate.
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
2017
Sub-project:
T7: Integration of effective heat treatment strategies into the manufacturing process for high-strength aluminium screws
Department(s):
Metallic materials and material fatigue
Funding organisations:
German Research Foundation
Funding reference number:
14208545
Running time:
2017–2019
Motivation & Objectives
This transfer project aims to apply the findings on precipitation engineering (forming in the solution-annealed state followed by precipitation hardening) in aluminium alloys, obtained as part of SFB692, to the practical production of screws. The aim is to harness the positive effects of a reduced ageing time and increased strength within a novel process chain. In collaboration with the industry partner EJOT GmbH & Co. KG, the altered precipitation kinetics following inhomogeneous forming involving changes in direction are being investigated in model and process chain trials.
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
2006
Sub-project:
C1: Strength/Failure
Department(s):
Metallic materials and material fatigue
Funding organisations:
German Research Foundation
Funding reference number:
14208545
Running time:
2006–2017
Motivation & Objectives
This sub-project aims to carry out fundamental microstructural investigations into the damage mechanisms in highly plastically deformed materials with a nanoscale structure. A deliberate distinction will be made between unreinforced and reinforced materials. For the safety-critical design of components, fundamental insights into the failure process, based on materials physics, are essential. In addition to characterising the damage mechanism, experiments are planned to identify material model parameters for numerical simulation.
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003
Below you will find our publications.
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Hardening by annealing in the medium-entropy alloy CrCoNi following equal-channel angular pressing (Rymer, Lisa-Marie*; Höppel, Heinz Werner; Ortner, Patrick; Pfeffer, Nina; Stark, Andreas; Winter, Lisa; Lampke, Thomas)
Prediction of fatigue strength in incrementally formed sheet metal parts with varying residual stresses (Bergelt, Tim*; Winter, Lisa; Härtel, Markus; Grünewald, Steffen; Rymer, Lisa-Marie; Maaß, Fabian; Joghan, Hamed Dardaei; Korkolis, Yannis P.; Tekkaya, A. Erman; Lampke, Thomas)
Damage evolution of Cu-inductors used for electromagnetic forming (Rymer, Lisa-Marie*; Winter, Lisa; Linnemann, Maik; Winter, Sven; Psyk, Verena; Lampke, Thomas)
High-cycle fatigue behaviour of high-speed blanked 5754 aluminium sheets (Winter, Lisa*; Winter, Sven; Psyk, Verena; Drehmann, Rico; Lampke, Thomas)
Influence of punch velocity during high-speed blanking of 22MnB5 steel with electromagnetic drive (Galiev, E.; Linnemann, M.; Winter, S.; Winter, Lisa; Psyk, V.; Dix, Martin)
Microstructural and mechanical properties of a hard anodic coating applied to an elastically pre-stressed aluminium substrate (Thomas George, Linto*; Winter, Lisa; Simchen, Frank; Breitfeld, Tobias; Lampke, Thomas)
Evaluation of Fracture Toughness of Plasma Electrolytic Oxidised Al2O3-ZrO2 Coatings Utilizing Nano-Scratch Technique (Hashemzadeh, M.; Simchen, Frank; Winter, Lisa; Lampke, Thomas)
Micro-scratch tests as a method for determining the wear resistance of high-speed blanked surfaces (Winter, Lisa*; Drehmann, Rico; Lampke, Thomas)
Thin-walled Product Forming (Erman Tekkaya, A.; Maaß, F.; Hahn, M.; Volk, W.; Plötz, M.; Gilch, I.; Buhl, J.; Liewald, M.; Heinzelmann, P.; Lampke, Thomas; Winter, Lisa; Hirt, G.; Pavliuchenko, P.)
Influence of Microstructure on the Forming Behaviour of Bipolar Plates (Nestler, M.; Porstmann, S.; Winter, Lisa; George Thomas, Linto; Galiev, E.; Lampke, Thomas; Kräusel, Verena)
The combination of diamond smoothing and intermediate cooling during wire arc spraying of Ni-5w%Al onto 1.0032 to improve high-cycle fatigue behaviour (Rymer, Lisa-Marie*; Winter, Lisa; Liborius, Hendrik; Lindner, Thomas; Schubert, Andreas; Lampke, Thomas)
Numerical and experimental study of high-speed blanking of DC06 steel (Galiev, E.; Winter, S.; Linnemann, M.; Winter, Lisa; Psyk, V.; Kräusel, V.)
Evaluation of Fracture Toughness of Plasma Electrolytic Oxidised Al2O3-ZrO2 Coatings Utilizing Nano-Scratch Technique (Hashemzadeh, Mehri*; Simchen, Frank; Winter, Lisa; Lampke, Thomas)
Fatigue Resistance of an Anodized and Hardanodized 6082 Aluminum Alloy Depending on the Coating Thickness in the High Cycle Regime (Winter, Lisa*; Lampke, Thomas)
Fracture behaviour of plasma electrolytic oxide coatings on an aluminium substrate using acoustic emission (Albero Rojas, Claudia*; Simchen, Frank; Winter, Lisa; Rymer, Lisa-Marie; Lampke, Thomas)
Heat Treatment: Its Effect on the Porosity and Tensile Properties of Field-Assisted Sintered AlSi7Mg0.6 (Hirsch, Sarah Johanna*; Winter, Lisa; Grund, Thomas; Lampke, Thomas)
Influence of Hydrothermal Sealing on the High-Cycle Fatigue Behaviour of the Anodised 6082 Aluminium Alloy (Winter, Lisa*; Lampke, Thomas)
Influence of Pre-Ageing on the Artificial Ageing Behaviour of a 6056 Aluminium Alloy following Conventional Extrusion (Winter, Lisa*; Hockauf, Kristin; Scholze, Mario; Hellmig, Ralph Jörg; Lampke, Thomas)
The effect of artificial ageing time on the crack propagation behaviour of aluminium alloy 6060 processed by equal-channel angular pressing (Rymer, Lisa-Marie*; Winter, Lisa; Hockauf, Kristin; Lampke, Thomas)
Influence of Pre-Ageing on the Hardness and Formability of a Thread-Rolled 6056 Aluminium Alloy following Conventional Extrusion and Artificial Ageing (Winter, Lisa*; Hellmig, Ralph Jörg; Hockauf, Kristin; Lampke, Thomas)
Improvement in the fatigue strength of a conversion-treated AlMgSi1 alloy through ECAP forming of the substrate (Winter, Lisa; Lampke, Thomas)
The influence of equal-channel angular pressing on the mean stress sensitivity in the high-cycle fatigue regime of the 6082 aluminium alloy (Winter, Lisa*; Hockauf, Kristin; Winter, Sven; Lampke, Thomas)
Influence of heat treatment prior to plastic deformation on the ageing behaviour and hardness of aluminium alloy 6056 (Winter, Lisa*; Einer, F.; Geisler, C.; Hellmig, R. J.; Hockauf, Kristin; Lampke, Thomas)
Mean stress sensitivity of the fatigue strength following equal-channel angular pressing of aluminium alloys 6082 and 6060 (Winter, Lisa*; Hockauf, Kristin; Lampke, Thomas)
The Influence of Temperature and Particle Size on the High-Cycle Fatigue Behaviour of the SiC-Reinforced 2124 Aluminium Alloy (Winter, Lisa*; Hockauf, Kristin; Lampke, Thomas)
High-cycle fatigue behaviour of the severely plastically deformed 6082 aluminium alloy with an anodic and plasma electrolytic oxide coating (Winter, Lisa*; Hockauf, Kristin; Lampke, Thomas)
The effect of plasma electrolytic oxidation on the mean stress sensitivity of the fatigue life of the 6082 aluminium alloy (Winter, Lisa*; Morgenstern, Roy; Hockauf, Kristin; Lampke, Thomas)
The Effect of Plasma Electrolytic Oxidation on the Mean Stress Sensitivity of the Fatigue Life of the 6082 Aluminium Alloy (Winter, Lisa; Morgenstern, Roy; Hockauf, Kristin; Lampke, Thomas)
C1: Strength/Failure (Hockauf, Kristin; Winter, Lisa)
Contact person
Dr.-Ing.
Lisa Winter
Department:
Metallic materials and material fatigue
Function:
Department management
Phone:
+49 (0)371 531 –
32632
EMail:
lisa.winter@mb…
Room:
E06.003 (old: 3/E003)
