|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Entropy Alloys V
||Structural Transition in High Entropy Alloy CoCrFeMnNi under High Pressure
||Yi-Hung Chen, E-Wen Huang, Chin-Ming Lin, Chia-En Hsu, Jien-Wei Yeh, Ke An
|On-Site Speaker (Planned)
The equiatomic CoCrFeMnNi high entropy alloy is in a single Face-Centered Cubic phase. High entropy alloys have different mechanical properties other than traditional alloys due to severe lattice distortion. It leads to extremely low stacking fault energy of this HEA at about 77K. Low stacking fault will cause nano twining or hexagonal close packing. Increasing pressure also make atoms distance shorten. We apply Advanced Photon Source to get diffraction pattern of different pressure. Results shows that this HEA begins phase transformation at about 7.1 Gpa. Some face centered cubic phases transfer to hexagonal close packing phases. The mechanism of phase transformation is related to appearance of stacking fault.
||Planned: Supplemental Proceedings volume