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

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

doi:10.1038/s41598-019-51297-4

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

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

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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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.

Original language	English
Article number	14788
Journal	Scientific Reports
Volume	9
Online published	15 Oct 2019
DOIs	https://doi.org/10.1038/s41598-019-51297-4
Publication status	Published - 2019
Externally published	Yes

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Huang, E.-W., Chou, H.-S., Tu, K. N., Hung, W.-S., Lam, T.-N., Tsai, C.-W., Chiang, C.-Y., Lin, B.-H., Yeh, A.-C., Chang, S.-H., Chang, Y.-J., Yang, J.-J., Li, X.-Y., Ku, C.-S., An, K., Chang, Y.-W., & Jao, Y.-L. (2019). Element Effects on High-Entropy Alloy Vacancy and Heterogeneous Lattice Distortion Subjected to Quasi-equilibrium Heating. Scientific Reports, 9, Article 14788. https://doi.org/10.1038/s41598-019-51297-4

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

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.",

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

year = "2019",

doi = "10.1038/s41598-019-51297-4",

language = "English",

volume = "9",

journal = "Scientific Reports",

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Huang, E-W, Chou, H-S, Tu, KN, Hung, W-S, Lam, T-N, Tsai, C-W, Chiang, C-Y, Lin, B-H, Yeh, A-C, Chang, S-H, Chang, Y-J, Yang, J-J, Li, X-Y, Ku, C-S, An, K, Chang, Y-W & Jao, Y-L 2019, 'Element Effects on High-Entropy Alloy Vacancy and Heterogeneous Lattice Distortion Subjected to Quasi-equilibrium Heating', Scientific Reports, vol. 9, 14788. https://doi.org/10.1038/s41598-019-51297-4

TY - JOUR

T1 - Element Effects on High-Entropy Alloy Vacancy and Heterogeneous Lattice Distortion Subjected to Quasi-equilibrium Heating

AU - Huang, E-Wen

AU - Chou, Hung-Sheng

AU - Tu, K. N.

AU - Hung, Wei-Song

AU - Lam, Tu-Ngoc

AU - Tsai, Che-Wei

AU - Chiang, Ching-Yu

AU - Lin, Bi-Hsuan

AU - Yeh, An-Chou

AU - Chang, Shan-Hsiu

AU - Chang, Yao-Jen

AU - Yang, Jun-Jie

AU - Li, Xiao-Yun

AU - Ku, Ching-Shun

AU - An, Ke

AU - Chang, Yuan-Wei

AU - Jao, Yu-Lun

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

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U2 - 10.1038/s41598-019-51297-4

DO - 10.1038/s41598-019-51297-4

M3 - RGC 21 - Publication in refereed journal

C2 - 31616021

SN - 2045-2322

VL - 9

JO - Scientific Reports

JF - Scientific Reports

M1 - 14788

ER -

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

Abstract

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