Impact of aluminum doping on the thermo-physical properties of refractory medium-entropy alloys
Impact of aluminum doping on the thermo-physical properties of refractory medium-entropy alloys
复制标题
铝掺杂对难熔中熵合金热物理性能的影响
DOI:
10.1063/1.4973489
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发表时间:
2017-01
影响因子:
3.2
通讯作者:
Vitos Levente
中科院分区:
文献类型:
--
作者:
Tian Fuyang;Wang Yang;Vitos Levente
We investigate the elastic moduli, ideal tensile strength, and thermodynamic properties of TiVNb and AlTiVNb refractory medium-entropy alloys (HEAs) by using ab initio alloy theories: the coherent potential approximation (CPA), the special quasi-random supercell (SQS), and a 432-atom supercell (SC). We find that with increasing number of alloy components, the SQS elastic constants become sensitive to the supercell size. The predicted elastic moduli are consistent with the available experiments. Aluminum doping decreases the stability of the body centered cubic phase. The ideal tensile strength calculation indicates that adding equiatomic Al to TiVNb random solid solution increases the intrinsic strength (ideal strain increase from 9.6% to 11.8%) and decreases the intrinsic strength (from 9.6 to 5.7 GPa). Based on the equation of states calculated by the CPA and SC methods, the thermodynamic properties obtained by the two ab initio methods are assessed. The L21 AlTiVNb (Ti-Al-V-Nb) alloy is predicted to be...
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影响因子:
9.4
作者:
Senkov, O. N.;Senkova, S. V.;Woodward, C.
通讯作者:
Woodward, C.
影响因子:
3.7
作者:
Tian, Fuyang;Varga, Lajos Karoly;Vitos, Levente
通讯作者:
Vitos, Levente
DOI:
10.1016/j.ijrmhm.2014.07.009
发表时间:
2014-11-01
影响因子:
3.6
作者:
Fazakas, E.;Zadorozhnyy, V.;Vitos, L.
通讯作者:
Vitos, L.
影响因子:
3.3
作者:
N. S. Weingarten;E. Byrd
通讯作者:
N. S. Weingarten;E. Byrd
影响因子:
3.7
作者:
Liu, JZ;van de Walle, A;Asta, M
通讯作者:
Asta, M