|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Advanced High Strength Steels V
||Twinning-induced Plasticity of Austenitic Lightweight High-entropy Steel
||Hung-Wei Yen, Zen-Hao Lai, Yi-Hsuan Sun, Yi-Ting Lin, Jui-Fan Tu
|On-Site Speaker (Planned)
The current work investigated mechanical behaviors of a novel austenitic lightweight steel which combined the originally contradictory two systems, lightweight steel and TWIP steel, by compositional complexity. This steel initially deformed via planar gliding of perfect dislocation, followed by slip of partial dislocations and deformation twin though its stacking fault energy is actually high. Moreover, the Hall-Petch constant of this steel is over 600 MPaμm-1/2, indicating a very effective strengthening by grain refinement. Combined with microband-induced plasticity and twinning-induced plasticity, this austenitic lightweight steel reached its yield strength of 400-500 MPa, ultimate tensile strength of 800-950 MPa, and total elongation of about 70%.