High temperature deformation behavior of dual-phase Al0.6CoCrFeNi high-entropy alloys

被引：32

作者：

Cao, Tangqing ^{[1
]}

Ma, Lili ^{[1
,2
]}

Wang, Lu ^{[1
]}

Zhou, Jinlian ^{[1
]}

Wang, Yangwei ^{[1
]}

Wang, Benpeng ^{[1
]}

Xue, Yunfei ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[2] Qinghai Univ, Sch Chem Engn, Xining 810016, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 836卷

基金：

中国国家自然科学基金;

关键词：

High-entropy alloy; Dual-phase; High temperature deformation; Recrystallization behavior; Mechanical property; TENSILE PROPERTIES; MICROSTRUCTURE; EVOLUTION; AL; RECRYSTALLIZATION; STABILITY; DUCTILITY; STRENGTH;

D O I：

10.1016/j.jallcom.2020.155305

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The deformation behavior of dual-phase (FCC + BCC) Al0.6CoCrFeNi high-entropy alloy (HEA) was investigated in a temperature range from 900 degrees C to 1200 degrees C and a strain rate range from 10(-3) to 1 s(-1). The BCC phase completely recrystallized when the deformation temperature exceeded 1100 degrees C, while the FCC phase did not even at 1200 degrees C. Continuing annealing at high temperature with long time (1200 degrees C for 20 h) can achieve an optimized microstructure, exhibiting that the island-shaped BCC phase uniformly distributed in the FCC phase with a fine equiaxed grain. Compared with the as-cast alloys, the annealed alloy shows an obvious increase in fracture strain with a relatively low decrease in yield stress, demonstrating that such a thermo-mechanical process is feasible for improving the mechanical property of dual-phase HEAs. (C) 2020 Elsevier B.V. All rights reserved.

引用

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