標題: | Element Effects on High-Entropy Alloy Vacancy and Heterogeneous Lattice Distortion Subjected to Quasi-equilibrium Heating |
作者: | Huang, E-Wen Chou, Hung-Sheng Tu, K. N. Hung, Wei-Song Tu-Ngoc Lam 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 交大名義發表 材料科學與工程學系 National Chiao Tung University Department of Materials Science and Engineering |
公開日期: | 15-Oct-2019 |
摘要: | 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. |
URI: | http://dx.doi.org/10.1038/s41598-019-51297-4 http://hdl.handle.net/11536/153014 |
ISSN: | 2045-2322 |
DOI: | 10.1038/s41598-019-51297-4 |
期刊: | SCIENTIFIC REPORTS |
Volume: | 9 |
起始頁: | 0 |
結束頁: | 0 |
Appears in Collections: | Articles |