Deviatoric deformation kinetics in high entropy alloy under hydrostatic compression

E-Wen Huang*, Chih Ming Lin, Jenh-Yih Juang, Yao Jen Chang, Yuan Wei Chang, Chan Sheng Wu, Che Wei Tsai, An Chou Yeh, Sean R. Shieh, Ching Pao Wang, Yu Chun Chuang, Yen Fa Liao, Dongzhou Zhang, Tony Huang, Tu Ngoc Lam, Yi Hung Chen


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13 引文 斯高帕斯(Scopus)


An equiatomic CoCrFeMnNi high-entropy alloy under hydrostatic compression is investigated using in-situ 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.

頁(從 - 到)116-121
期刊Journal of Alloys and Compounds
出版狀態Published - 5 7月 2019


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