|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Entropy Alloys V
||Plastic Deformation Mechanisms in A3S and Cantor’s HEA Alloys Investigated by In Situ TEM Straining Experiments
||Marc Legros, Michal Mroz, Anna Fraczkiewicz
|On-Site Speaker (Planned)
In a non-equiatomic HEA from CoCrFeMnNi family (A3SŪ grade), mechanical resistance (YS) is strongly increased as compared with the equiatomic (Cantor’s) alloy of the same family. This behavior comes from a stable nanostructure, easily formed in the material after classical hot thermomechanical treatment (forging). In situ TEM straining experiments were carried out at room temperature in as-cast and annealed samples. Dislocations movements are analyzed with respect to the applied stress that is measured locally using dislocation curvature. Potential intrinsic (core structure) or extrinsic (grain boundary, forest mechanisms) strengthening mechanisms are discussed, as well as the collective motion of partial or perfect dislocations.
||Planned: Supplemental Proceedings volume