|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||Study of Deformation Characteristics CoCrFeMnNi and Associated Alloys at Very Low Temperatures
||Aditya Srinivasan, Theresa Hanemann, Klaus-Peter Weiss, Christian Reinhart, Guillaume Laplanche , Sabine Schlabach, Dorothee-Vinga Szabo, David Gei▀ler, Jens Freudenberger, Martin Heilmaier, Alexander Kauffmann
|On-Site Speaker (Planned)
The deformation of the Cantor alloy and single phase FCC subsets of the system was carried out at cryogenic temperatures. Through tensile tests conducted in the temperature interval between 4.2 K and 77 K, the observed serrated plastic flow was found to be largely unaffected by extrinsic experimental parameters. The serrations were evaluated statistically and the stress drop variation with progressive deformation shows a tendency towards an increased influence of dislocation-related events. Additionally, the misinterpreted effect of deformation twinning at these low temperatures has been addressed. Characteristic features of deformation seen at these temperatures, vis Ó vis, appearance of aforementioned deformation twinning, appearance of epsilon martensite (or the lack of in certain cases) and the corresponding effect on deformation was studied by comparing the alloys that exhibited these features. This was done utilizing characterization methods such as EBSD, BSE imaging and TEM.