Element Effects on High-Entropy Alloy Vacancy and Heterogeneous Lattice Distortion Subjected to Quasi-equilibrium Heating-Reference-Cited by-同舟云学术

Element Effects on High-Entropy Alloy Vacancy and Heterogeneous Lattice Distortion Subjected to Quasi-equilibrium Heating

Published:2019-10-15 Issue:1 Volume:9 Page:
ISSN:2045-2322
Container-title:Scientific Reports
language:en
Short-container-title:Sci Rep

Author:

Huang E-Wen^ORCID,Chou Hung-Sheng^ORCID,Tu K. N.,Hung Wei-Song,Lam Tu-Ngoc,Tsai Che-Wei,Chiang Ching-Yu,Lin Bi-Hsuan,Yeh An-Chou,Chang Shan-Hsiu,Chang Yao-Jen,Yang Jun-Jie,Li Xiao-Yun,Ku Ching-Shun,An Ke^ORCID,Chang Yuan-Wei,Jao Yu-Lun

Abstract

Abstract We applied Simmons–Balluffi methods, positron measurements, and neutron diffraction to estimate the vacancy of CoCrFeNi and CoCrFeMnNi high-entropy alloys (HEAs) using Cu as a benchmark. The corresponding formation enthalpies and associated entropies of the HEAs and Cu were calculated. The vacancy-dependent effective free volumes in both CoCrFeNi and CoCrFeMnNi alloys are greater than those in Cu, implying the easier formation of vacancies by lattice structure relaxation of HEAs at elevated temperatures. Spatially resolved synchrotron X-ray measurements revealed different characteristics of CoCrFeNi and CoCrFeMnNi HEAs subjected to quasi-equilibrium conditions at high temperatures. Element-dependent behavior revealed by X-ray fluorescence (XRF) mapping indicates the effect of Mn on the Cantor Alloy.

Publisher

Springer Science and Business Media LLC

Subject

Multidisciplinary

Link

http://www.nature.com/articles/s41598-019-51297-4.pdf

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