|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Thermally Activated Processes and Labusch-type Analysis of Deformation Behavior in Equiatomic Alloys
||Zhenggang Wu, Hongbin Bei, Yanfei Gao
|On-Site Speaker (Planned)
A large class of equiatomic or near equiatomic alloys with more than three elements and random solid-solution FCC structures has been recently developed. These alloys exhibit an unusual temperature-dependent flow stress, an unusual hardening behavior with respect to the crystallographic orientation, and extraordinary ductility at cryogenic conditions. Experimental measurements suggest the lattice friction be the dominant mechanism, which is modeled by the motion of non-straight dislocations by thermally activated processes involving local bowing of the dislocation lines. Although this process resembles that in BCC crystals, the hardening behavior exhibits multiple hardening stages as in FCC metals. Labush-type models can be successfully employed to understand these findings.
Acknowledgements: Research supported by the US Department of Energy, BES, Materials Sciences and Engineering Division.
||Planned: Supplemental Proceedings volume