Professorship for materials mechanics

Organisational unit: Professoship

Organisation profile

The professorship for materials mechanics with a focus on process simulation is a shared professorship carried out in cooperation with the Helmholtz-Zentrum hereon GmbH. In particular, this is concerned with the digital modelling of technological production processes and materials, whereby considerable focus is placed on local modification processes, solid state joining processes and forming processes. The modelling approaches which are used for these range from micromechanics (e.g. crystal plasticity and phase field simulations), to continuum mechanics for describing material behaviour, to approaches for complex process simulations.

Main research areas

At the same time, one of the main focuses of the activities carried out by the professorship at the Leuphana is the development and application of mathematical models (material models) for describing microstructure development and the deformation behaviour of various metallic materials across multiple length scales. These developments often take place in close conjunction with the experimental work being carried out at the hereon. The length scale and timescale on which the relevant processes in the material take place or on which these are modelled depends on the material, the process and the component. Over the past few years, the work group has built up a vast wealth of experience when it comes to modelling many material systems such as these. In addition to carrying out intense studies on deformation processes in metallic materials, the work group has also dealt with additional material systems such as metallic glasses and polymers.

At the Helmholtz-Zentrum hereon, the professorship deals specifically with the experimental study and process modelling of solid state joining processes and manufacturing processes which act on a local level. Some named examples of these are joining processes such as friction stir welding and laser welding, as well as additive manufacturing processes such as friction welding and laser deposition welding. This is accompanied by local modification processes for the targeted adjustment of residual stresses (residual stress engineering), such as laser shock peening and hammer peening. One of the fundamental goals of these research activities is to investigate the entire system of process, microstructure and property through a combination of experimental and simulation-based approaches in order to achieve an improved physical understanding thereof. By adapting the process parameters in a targeted manner, the insights gained can be used to optimise material or structural behaviour, e.g. with regard to deformation and failure behaviour.

The professorship plays an active role in various national and international organisations such as the GAMM (International Association of Applied Mathematics and Mechanics) or the ZHM (Centre for Advanced Materials).

Key teaching focuses are in the fields of applied mechanics and material modelling, as well as in the provision of additional engineering basics.

  1. 2023
  2. Published

    Refill friction stir spot welding of thermoplastic composites: Case study on Carbon-fiber-reinforced polyphenylene sulfide

    Schäfer, H., Blaga, L. A., Stöver, E. & Klusemann, B., 01.10.2023, In: Thin-Walled Structures. 191, 111037.

    Research output: Journal contributionsJournal articlesResearch

  3. Published

    Correlation of Microstructure and Local Mechanical Properties Along Build Direction for Multi-layer Friction Surfacing of Aluminum Alloys

    Kallien, Z., Hoffmann, M., Roos, A. & Klusemann, B., 10.2023, In: JOM: Journal of The Minerals, Metals & Materials Society. 75, 10, p. 4212-4222 11 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  4. Published

    Microstructural development of as-cast AM50 during Constrained Friction Processing: grain refinement and influence of process parameters

    de Castro, C. C., Shen, J., dos Santos, J. F. & Klusemann, B., 01.09.2023, In: Journal of Materials Processing Technology. 318, 11 p., 118018.

    Research output: Journal contributionsJournal articlesResearch

  5. Published

    Rapid grain refinement and compositional homogenization in a cast binary Cu50Ni alloy achieved by friction stir processing

    Escobar, J., Gwalani, B., Silverstein, J., Ajantiwalay, T., Roach, C., Bergmann, L., dos Santos, J. F., Maawad, E., Klusemann, B. & Devaraj, A., 01.08.2023, In: Materials Characterization. 202, 10 p., 112999.

    Research output: Journal contributionsJournal articlesResearch

  6. Published

    Semi-stationary shoulder bobbin-tool: A new approach in tailoring macrostructure and mechanical properties of bobbin-tool friction stir welds in magnesium alloy

    Li, G., Chen, T., Fu, B., Shen, J., Bergmann, L., Zhou, L., Chen, K., Santos, J. F. D. & Klusemann, B., 01.08.2023, In: Journal of Materials Processing Technology. 317, 117984.

    Research output: Journal contributionsJournal articlesResearch

  7. Published

    Fatigue behaviour of multi-spot joints of 2024-T3 aluminium sheets obtained by refill Friction Stir Spot Welding with polysulfide sealant

    Bernardi, M., Suhuddin, U. F. H., Fu, B., Gerber, J. P., Bianchi, M., Ostrovsky, I., Sievers, B., Faes, K., Maawad, E., Lazzeri, L., dos Santos, J. F. & Klusemann, B., 01.07.2023, In: International Journal of Fatigue. 172, 107539.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  8. Published

    Fatigue crack propagation in AA5083 structures additively manufactured via multi-layer friction surfacing

    Kallien, Z., Knothe-Horstmann, C. & Klusemann, B., 01.07.2023, In: Additive Manufacturing Letters. 6, 7 p., 100154.

    Research output: Journal contributionsComments / Debate / ReportsResearch

  9. Published

    Quasi-in-situ observation of microstructure at the friction interface: Shear deformation, dynamic recrystallization and mechanical responses during friction welding process

    Jin, F., Fu, B., Shen, J., Li, J., Li, W., Santos, J. F. D. & Klusemann, B., 01.06.2023, In: Materials Characterization. 200, 112911.

    Research output: Journal contributionsJournal articlesResearch

  10. Published

    Friction Riveting of FR4 substrates for printed circuit boards: Influence of process parameters on process temperature development and joint properties

    Rodrigues, C. F., Blaga, L. & Klusemann, B., 01.05.2023, In: Journal of Materials Research and Technology. 24, p. 4639-4649 11 p.

    Research output: Journal contributionsJournal articlesResearch

  11. Published

    On anisotropic tensile mechanical behavior of Al-Cu-Li AA2198 alloy under different ageing conditions

    Examilioti, T. N., Li, W., Kashaev, N., Ventzke, V., Klusemann, B., Tiryakioğlu, M. & Alexopoulos, N. D., 01.05.2023, In: Journal of Materials Research and Technology. 24, p. 895-908 14 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  12. Published

    Temperature-dependent mechanical behavior of aluminum AM structures generated via multi-layer friction surfacing

    Kallien, Z., Roos, A., Knothe-Horstmann, C. & Klusemann, B., 26.04.2023, In: Materials Science & Engineering A. 871, 11 p., 144872.

    Research output: Journal contributionsJournal articlesResearch

  13. Published

    Friction extrusion processing of aluminum powders: Microstructure homogeneity and mechanical properties

    Chan, C. Y. C., Rath, L., Suhuddin, U. F. H. & Klusemann, B., 19.04.2023, Material Forming: The 26th International ESAFORM Conference on Material Forming - ESAFORM 2023 - held in Kraków, Poland, April 19-21, 2023. Madej, L., Sitko, M. & Perzynski, K. (eds.). Millersville: MaterialsResearchForum LLC, Vol. 1. p. 515-522 8 p. 56. (Materials Research Proceedings; vol. 28).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  14. Published

    Process characteristics of constrained friction processing of AM50 magnesium alloy

    de Castro, C. C., Shen, J., Dos Santos, J. F. & Klusemann, B., 19.04.2023, Material Forming: The 26th International ESAFORM Conference on Material Forming - ESAFORM 2023 - held in Kraków, Poland, April 19-21, 2023. Madej, L., Sitko, M. & Perzynski, K. (eds.). Millersville: MaterialsResearchForum LLC, Vol. 3. p. 1739-1746 8 p. 188. (Materials Research Proceedings; vol. 28).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  15. Published

    Process simulation of friction extrusion of aluminum alloys

    Diyoke, G., Rath, L., Chafle, R., Ben Khalifa, N. & Klusemann, B., 19.04.2023, Material Forming: The 26th International ESAFORM Conference on Material Forming - ESAFORM 2023 - held in Kraków, Poland, April 19-21, 2023. Madej, L., Sitko, M. & Perzynski, K. (eds.). Millersville: MaterialsResearchForum LLC, Vol. 1. p. 487-494 8 p. (Materials Research Proceedings; vol. 28).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  16. Published

    Analysis of a phase‐field finite element implementation for precipitation

    Safi, A. R., Chafle, R. & Klusemann, B., 01.03.2023, In: PAMM. 22, 1, 6 p., e202200238.

    Research output: Journal contributionsConference article in journalResearch

  17. Published

    Anisotropy and mechanical properties of dissimilar Al additive manufactured structures generated by multi-layer friction surfacing

    Rath, L., Kallien, Z., Roos, A., dos Santos, J. F. & Klusemann, B., 03.2023, In: The International Journal of Advanced Manufacturing Technology. 125, 5-6, p. 2091-2102 12 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  18. Published

    Strengthening Mechanisms and Strain Hardening Behavior of 316L Stainless Steel Manufactured by Laser-Based Powder Bed Fusion

    Taghipour, A., Mazaheri, Y., McDavid, J., Sheikhi, S., Braun, M., Shen, J., Klusemann, B. & Ehlers, S., 02.2023, In: Advanced Engineering Materials. 25, 4, 16 p., 2201230.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  19. Published

    Effect of Welding Speed on Friction Stir Welds of PM2000 Alloy

    Wang, J., Fu, B., Bergmann, L., Liu, F. & Klusemann, B., 01.2023, In: Journal of Materials Engineering and Performance. 32, 2, p. 577-586 10 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  20. 2022
  21. Published

    Heterogenous activation of dynamic recrystallization and twinning during friction stir processing of a Cu-4Nb alloy

    Escobar, J., Gwalani, B., Olszta, M., Silverstein, J., Ajantiwalay, T., Overman, N., Fu, W., Li, Y., Bergmann, L., Maawad, E., Klusemann, B., Santos, J. F. D. & Devaraj, A., 20.12.2022, In: Journal of Alloys and Compounds. 928, 9 p., 167007.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  22. Published

    Influence of laser shock peening on the residual stresses in additively manufactured 316L by Laser Powder Bed Fusion: A combined experimental-numerical study

    Sandmann, P., Keller, S., Kashaev, N., Ghouse, S., Hooper, P. A., Klusemann, B. & Davies, C. M., 01.12.2022, In: Additive Manufacturing. 60, Part A, 14 p., 103204.

    Research output: Journal contributionsJournal articlesResearch