標題: Deviatoric deformation kinetics in high entropy alloy under hydrostatic compression
作者: Huang, E-Wen
Lin, Chih-Ming
Juang, Jenh-Yih
Chang, Yao-Jen
Chang, Yuan-Wei
Wu, Chan-Sheng
Tsai, Che-Wei
Yeh, An-Chou
Shieh, Sean R.
Wang, Ching-Pao
Chuang, Yu-Chun
Liao, Yen-Fa
Zhang, Dongzhou
Huang, Tony
Tu-Ngoc Lam
Chen, Yi-Hung
材料科學與工程學系
電子物理學系
Department of Materials Science and Engineering
Department of Electrophysics
關鍵字: High pressure;High entropy alloys;Cantor alloy;Phase transformation
公開日期: 5-Jul-2019
摘要: An equiatomic CoCrFeMnNi high-entropy alloy under hydrostatic compression is investigated using insitu angular-dispersive X-ray diffraction to explore the polymorphism in high entropy alloy systems. The metallic system is of face-centered-cubic structure at ambient condition and applied hydrostatic pressures up to 20 GPa via diamond anvil cell. The angle-resolved diffraction-intensity evolutions of multiple diffraction peaks were collected simultaneously to elucidate the phase stability examinations. The phase transformation from face-centered-cubic to hexagonal-close-packed structure was evidently observed in CoCrFeMnNi alloy accompanied by a deviatoric strain subjected to the hydrostatic compression. We found lattice-asymmetric crossover before and after the phase transformation subjected to hydrostatic compression surroundings. Deviatoric strain triggers fcc-hcp phase transformation as local heterogeneity-driven lattice distortion is significant for CoCrFeMnNi alloy. (c) 2019 The Authors. Published by Elsevier B.V.
URI: http://dx.doi.org/10.1016/j.jallcom.2019.03.349
http://hdl.handle.net/11536/151963
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2019.03.349
期刊: JOURNAL OF ALLOYS AND COMPOUNDS
Volume: 792
起始頁: 116
結束頁: 121
Appears in Collections:Articles