Acta Metallurgica Sinica (English Letters) ›› 2020, Vol. 33 ›› Issue (8): 1151-1158.DOI: 10.1007/s40195-020-01080-6
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Jia-Qi Zhao1, Hua Tian2(), Zhong Wang1, Xue-Jiao Wang1, Jun-Wei Qiao1(
)
Received:
2020-01-17
Revised:
2020-03-02
Online:
2020-08-10
Published:
2020-08-06
Contact:
Hua Tian,Jun-Wei Qiao
Jia-Qi Zhao, Hua Tian, Zhong Wang, Xue-Jiao Wang, Jun-Wei Qiao. FCC-to-HCP Phase Transformation in CoCrNix Medium-Entropy Alloys[J]. Acta Metallurgica Sinica (English Letters), 2020, 33(8): 1151-1158.
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BCC | HCP | FCC | |
---|---|---|---|
CoCrNi | 1.112 | - 0.418 | - 0.435 |
CoCrNi0.9 | 1.180 | - 0.367 | - 0.379 |
CoCrNi0.8 | 1.227 | - 0.308 | - 0.315 |
CoCrNi0.7 | 1.314 | - 0.264 | - 0.269 |
CoCrNi0.6 | 1.357 | - 0.217 | - 0.221 |
CoCrNi0.5 | 1.390 | - 0.168 | - 0.171 |
Table 1 Mixing energies of CoCrNix (x = 1-0.5) MEAs (eV/atom)
BCC | HCP | FCC | |
---|---|---|---|
CoCrNi | 1.112 | - 0.418 | - 0.435 |
CoCrNi0.9 | 1.180 | - 0.367 | - 0.379 |
CoCrNi0.8 | 1.227 | - 0.308 | - 0.315 |
CoCrNi0.7 | 1.314 | - 0.264 | - 0.269 |
CoCrNi0.6 | 1.357 | - 0.217 | - 0.221 |
CoCrNi0.5 | 1.390 | - 0.168 | - 0.171 |
c11 | c12 | c44 | c' | B | G | E | ν | B/G | |
---|---|---|---|---|---|---|---|---|---|
CoCrNi | 291.144 | 168.035 | 145.812 | 61.555 | 209.071 | 103.166 | 265.780 | 0.288 | 2.027 |
CoCrNiexp | 203.127 | 98.605 | 239.374 | 0.307 | 2.060 | ||||
CoCrNi0.9 | 289.615 | 168.564 | 149.345 | 60.526 | 208.914 | 103.962 | 267.511 | 0.287 | 2.010 |
CoCrNi0.9exp | 201.364 | 101.167 | 246.811 | 0.303 | 1.990 | ||||
CoCrNi0.8 | 275.136 | 175.459 | 148.155 | 49.839 | 208.685 | 105.820 | 271.559 | 0.283 | 1.972 |
CoCrNi0.8exp | 200.278 | 102.972 | 261.493 | 0.282 | 1.945 | ||||
CoCrNi0.7 | 292.022 | 168.380 | 146.139 | 61.821 | 209.594 | 108.829 | 278.316 | 0.279 | 1.926 |
CoCrNi0.7exp | 208.742 | 109.634 | 278.645 | 0.274 | 1.904 | ||||
CoCrNi0.6 | 304.563 | 165.484 | 151.275 | 69.540 | 211.844 | 110.74 | 282.922 | 0.277 | 1.913 |
CoCrNi0.6exp | 214.751 | 114.837 | 282.379 | 0.268 | 1.870 | ||||
CoCrNi0.5 | 315.125 | 137.512 | 154.855 | 73.807 | 216.716 | 115.015 | 293.179 | 0.275 | 1.884 |
CoCrNi0.5exp | 219.331 | 123.444 | 305.014 | 0.263 | 1.777 |
Table 2 Simulation results of three cubic constants c11, c12, and c44(GPa), the tetragonal shear modulus c′ (GPa), the bulk elastic modulus B (GPa), the shear modulus G (GPa), the Young's modulus E (GPa), Poisson's ratio ν, and the B/G ratio
c11 | c12 | c44 | c' | B | G | E | ν | B/G | |
---|---|---|---|---|---|---|---|---|---|
CoCrNi | 291.144 | 168.035 | 145.812 | 61.555 | 209.071 | 103.166 | 265.780 | 0.288 | 2.027 |
CoCrNiexp | 203.127 | 98.605 | 239.374 | 0.307 | 2.060 | ||||
CoCrNi0.9 | 289.615 | 168.564 | 149.345 | 60.526 | 208.914 | 103.962 | 267.511 | 0.287 | 2.010 |
CoCrNi0.9exp | 201.364 | 101.167 | 246.811 | 0.303 | 1.990 | ||||
CoCrNi0.8 | 275.136 | 175.459 | 148.155 | 49.839 | 208.685 | 105.820 | 271.559 | 0.283 | 1.972 |
CoCrNi0.8exp | 200.278 | 102.972 | 261.493 | 0.282 | 1.945 | ||||
CoCrNi0.7 | 292.022 | 168.380 | 146.139 | 61.821 | 209.594 | 108.829 | 278.316 | 0.279 | 1.926 |
CoCrNi0.7exp | 208.742 | 109.634 | 278.645 | 0.274 | 1.904 | ||||
CoCrNi0.6 | 304.563 | 165.484 | 151.275 | 69.540 | 211.844 | 110.74 | 282.922 | 0.277 | 1.913 |
CoCrNi0.6exp | 214.751 | 114.837 | 282.379 | 0.268 | 1.870 | ||||
CoCrNi0.5 | 315.125 | 137.512 | 154.855 | 73.807 | 216.716 | 115.015 | 293.179 | 0.275 | 1.884 |
CoCrNi0.5exp | 219.331 | 123.444 | 305.014 | 0.263 | 1.777 |
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