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

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-d...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2019-10, Vol.9 (1), p.14788-10, Article 14788
Main Authors: Huang, E-Wen, Chou, Hung-Sheng, 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, Chang, Yuan-Wei, Jao, Yu-Lun
Format: Article
Language:English
Subjects:
639/301/1023/1026
639/301/1023/303
Alloys
High temperature
Humanities and Social Sciences
MATERIALS SCIENCE
Mechanical properties
Metals and alloys
multidisciplinary
Neutron diffraction
Neutrons
Science
Science & Technology - Other Topics
Science (multidisciplinary)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-51297-4