Mechanical properties


We carry out macroscopic deformation experiments in compression using a ZWICK Z050 testing system, equipped with a high-temperature furnace (up to 1200 °C), a high-precision strain gauge (± 10 nm) and a video system for in-situ sample monitoring during deformation.

The group has long standing expertise in the analysis of mechanical testing experiments including incremental testing (e.g. stress-relaxation, temperature cycling, etc.) to determine thermodynamic activation parameters of the deformation process. We characterize the microstructure of deformed materials in depth, employing the transmission electron microscopes of the Ernst-Ruska Centre, and applying techniques such as Bragg-contrast imaging, Convergent Beam Electron Diffraction, and high-resolution imaging.

Particular achievements of the group are the consistent characterization of quasicrystal plasticity in terms of a cluster friction model, and the discovery of metadislocations, a novel class of defects enabling plastic deformation of complex, large unit-cell materials. Currently we are focusing on the mechanical characterization of high-entropy alloys.

M. Feuerbacher. Dislocations in Icosahedral Quasicrystals Invited Review. Chem. Soc. Rev. 41, 2012, 6745.
H. Klein, M. Feuerbacher, P.Schall and K.Urban. A novel type of dislocation in an Al-Pd-Mn quasicrystal approximant, Phys. Rev. Lett, 82 1999, 3468. 
M. Heggen, L. Houben, M. Feuerbacher. Plastic deformation mechanism in complex solids Nature Materials 9, 2010, 332.


Mechanical properties

Dr Michael Feuerbacher
Phone: +49 2461 61-2409
Fax: +49 2461 61-6444

Last Modified: 22.02.2023