|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Anisotropic Lattice Distortion Induced by Hydrogen in CoCrFeMnNi High-entropy Alloy
||Hung-Wei Yen, Shi-Wei Chen, Yu-Ting Mai, Yi-Ting Lin
|On-Site Speaker (Planned)
CoCrFeMnNi high-entropy alloy (HEA) owns high resistance to hydrogen embrittlement. This fact was explained by the enhancement of deformation twinning when hydrogen is involved. However, the relationship between mechanical twin and hydrogen in CoCrFeMnNi HEA is still absent. The current work investigated behavior of hydrogen in CoCrFeMnNi HEA by using thermal desorption analysis, synchronicity diffraction, and neutron scattering. It was found that stored hydrogen in CoCrFeMnNi HEA leads to anisotropic lattice strain on (1 1 1) plane. Stored hydrogen in the alloy is in the form of localized hydrogen clusters. This result conflicts the proposition claimed by W. Johnson since 1875. Moreover, this metallurgical principle can be developed into an approach to prevent from hydrogen embrittlement in advanced alloys.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume