| Autor: |
Duan, Chuyi, Reiberg, Marius, Kutlesa, Peter, Li, Xiaohu, Pippan, Reinhard, Werner, Ewald |
| Předmět: |
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| Zdroj: |
Continuum Mechanics & Thermodynamics; Mar2022, Vol. 34 Issue 2, p475-489, 15p |
| Abstrakt: |
An equiatomic MoNbTaTiVZr refractory high-entropy alloy (HEA) produced by arc melting was processed by high-pressure torsion (HPT) at room temperature. Thermodynamic calculations and experimental results indicated a dual-phase microstructure composed of about 85% BCC Zr-depleted and 15% BCC Zr-rich phase in the as-cast condition. HPT causes grain refinement and an increase in dislocation density without the formation of new phases. After four revolutions, the Zr-depleted phase was hardened to ∼ 540 HV, while the Zr-rich phase exhibited softening with a decrease in hardness to ∼ 480 HV. The occurrence of a vortex-like microstructure and the analysis of elemental concentrations indicated a shear-induced mechanical homogenization, which was supposed to be the cause of the observed softening. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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