|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Entropy Alloys V
||Dynamic Behavior and Grain Refinement of AlxCoCrFeNi High-entropy Alloy
||Zezhou Li, Shiteng Zhao, Haoyan Diao, Shima Sabbaghianrad, Terence G. Langdon, Peter K. Liaw, Marc A. Meyers
|On-Site Speaker (Planned)
The mechanical behavior of single phase (fcc) Al0.3CoCrFeNi HEA and dual phase (fcc and bcc) Al0.5CoCrFeNi HEA was studied in the low and high-strain-rate regimes. The combination of multiple strengthening mechanisms of alloys such as solid solution hardening, forest dislocation hardening, as well as mechanical twinning lead to an excellent work hardening rate, which is significantly larger than that for Al and is retained in the dynamic regime. The resistance to shear localization of Al0.3CoCrFeNi HEA was evaluated by dynamically loading hat-shaped specimens to induce forced shear localization but no adiabatic shear band could be observed. It is therefore proposed that the excellent strain hardening ability gives rise to remarkable resistance to shear localization, which makes Al0.3CoCrFeNi HEA an excellent candidate for armor. The coarse grained AlxCoCrFeNi HEA were subjected to severe plastic deformation using high-pressure torsion for grain refinement to achieve higher strength.
||Planned: Supplemental Proceedings volume