A novel bulk eutectic high-entropy alloy with outstanding as-cast specific yield strengths at elevated temperatures

被引：262
|
作者：
Wang, Mingliang [1 ]
Lu, Yiping [1 ]
Wang, Tongmin [1 ]
Zhang, Chuan [2 ]
Cao, Zhiqiang [1 ]
Li, Tingju [1 ]
Liaw, Peter K. [3 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Solidificat Control & Digital Preparat Te, Dalian 116024, Peoples R China
[2] CompuTherm LLC, Middleton, WI 53562 USA
[3] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
来源：
SCRIPTA MATERIALIA | 2021年 / 204卷 / 204期
基金：
中国博士后科学基金; 美国国家科学基金会; 中国国家自然科学基金;
关键词：
Eutectic high-entropy alloy; L2(1) structure; Hardness; Specific yield strength; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; MICROSTRUCTURE; DESIGN; SYSTEM; SOLIDIFICATION; RESISTANCE; MORPHOLOGY; STABILITY; DUCTILITY;
D O I：
10.1016/j.scriptamat.2021.114132
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Due to their excellent properties and great potential for industrial application, eutectic high-entropy alloys (EHEAs) have been a hot topic of study over the past few years. The current study reports a novel AlCr1.3TiNi2 EHEA with a low density and outstanding mechanical properties at elevated temperatures. A kilogram-scale EHEA ingot with uniform and ultrafine L2(1) and BCC lamellar structures (interlamellar spacing similar to 400 nm) was firstly prepared by a direct solidification method. The as-cast AlCr1.3TiNi2 EHEA exhibits much higher room- and high-temperature hardness and specific yield strength values than most reported refractory high-entropy alloys (RHEAS), EHEAs, and conventional Ni- and Ti-based alloys. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页数：7
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