Structure and mechanical properties of an in situ refractory Al20Cr10Nb15Ti20V25Zr10 high entropy alloy composite

被引：47

作者：

Yurchenko, N. ^{[1
]}

Panina, E. ^{[1
]}

Tikhonovsky, M. ^{[2
]}

Salishchev, G. ^{[1
]}

Zherebtsov, S. ^{[1
]}

Stepanov, N. ^{[1
]}

机构：

[1] Belgorod Natl Res Univ, Lab Bulk Nanostruct Mat, Pobeda 85, Belgorod 308015, Russia

[2] NAS Ukraine, Kharkov Inst Phys & Technol, Natl Sci Ctr, UA-61108 Kharkov, Ukraine

来源：

MATERIALS LETTERS | 2020年 / 264卷

基金：

俄罗斯科学基金会;

关键词：

Refractory high-entropy alloys; In situ composite; Structure; Thermo-Calc; Deformation behavior; Mechanical properties; PRINCIPAL ELEMENT ALLOYS; LOW-DENSITY; MICROSTRUCTURE; ZR; CR; STABILITY;

D O I：

10.1016/j.matlet.2020.127372

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 degrees 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 degrees C; compatibility of plastic deformation at 800 degrees 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. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：5

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