|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||Anisotropic Lattice Excitation Induced by Hydrogen in CoCrFeMnNi High-entropy Alloy
||Hung-Wei Yen, Shih-Wei Chen, Yan-Gu Lin, Chun-Ming Wu, Tsai Che-Wei, Yu-Ting Mai
|On-Site Speaker (Planned)
CoCrFeMnNi high-entropy alloy (HEA) has been reported to own high resistance to hydrogen embrittlement. This fact was explained by the enhancement of deformation twinning when hydrogen is involved. However, the relationship between deformation twin and hydrogen in CoCrFeMnNi HEA is still unknown. 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. Moreover, stored hydrogen in the alloy is in the form of localized hydrogen clusters. This result breaks the proposition claimed by Johnson since 1875. The metallurgical principle can be developed into an new approach to prevent from hydrogen embrittlement.