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Structure and mechanical properties of an in-situ refractory Al20Cr10Nb15Ti20V25Zr10 high entropy alloy composite
Materials Letters ( IF 3.019 ) Pub Date : 2020-01-17 , DOI: 10.1016/j.matlet.2020.127372
N. Yurchenko; E. Panina; M. Tikhonovsky; G. Salishchev; S. Zherebtsov; N. Stepanov

Structure, deformation behavior, and mechanical properties of a refractory Al20Cr10Nb15Ti20V25Zr10 high entropy alloy are reported. In the as-cast state, the alloy had a composite-like hypoeutectic microstructure comprised of a softer primary B2 phase and a harder eutectic mixture consisting of a C14 Laves and the B2 phases. Annealing at 1200°C retained the composite-like constitution and led to the formation of a small amount of a Zr5Al3-type phase. The annealing also had a positive effect on strength and ductility of the alloy at 22 and 800°C; compatibility of plastic deformation at 800°C can be ascribed to the relative softness of the B2 phase. Reasonable agreement was found between the experimental structures and the results of thermodynamic modeling.
更新日期:2020-01-21

 

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