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论文类型：期刊论文

发表时间：2013-10-05

发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物：SCIE、EI

卷号：573

页面范围：96-101

ISSN号：0925-8388

关键字：Alloy design; Microstructure; Mechanical property; Crystallography; Crystal growth

摘要：The AlCrFeNiMox (x = 0, 0.2, 0.5, 0.8, 1.0) high entropy alloys were produced by vacuum arc melting, and their microstructure and mechanical properties were investigated. AlCrFeNi, AlCrFeNiMo0.2, and AlCrFeNiMo0.5 alloys contained two body centered cubic (BCC) phases which were AlNi-type intermetallic compound and FeCr-type solid solution. The diffraction peaks of the two BCC phases separated with the increase of Mo content while Mo element preferred to dissolve into FeCr-type solid solution. When the value of x was higher than 0.5, the FeCrMo-type sigma phase appeared and replaced the FeCr-type solid solution. The AlCrFeNiMo0.2 had the highest fracture strength of 3222 MPa and plastic strain of 0.287. The hardness increased obviously from HV472.4 to HV911.5 with the addition of Mo element. The solid-solution strengthening of the BCC matrix and the sigma phase hardening were the two main factors that strengthened the alloys. The AlCrFeNiMo0.2 high entropy alloy possesses the excellent mechanical properties which imply its potential application in industrial areas. (C) 2013 Elsevier B. V. All rights reserved.