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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：材料科学与工程学院院长、党委副书记
其他任职：辽宁省高熵合金材料工程研究中心常务副主任、大连理工大学滇西产业发展研究院先进材料制备及装备技术工程研究中心主任
性别：男
毕业院校：西北工业大学
学位：博士
所在单位：材料科学与工程学院
学科：材料加工工程. 材料学. 材料物理与化学
办公地点：辽宁省凝固控制与数字化制备技术重点实验室315室
联系方式：0411-84709400
电子邮箱：luyiping@dlut.edu.cn
Effects of annealing treatment on microstructure and hardness of bulk AlCrFeNiMo0.2 eutectic high-entropy alloy
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论文类型：期刊论文
发表时间：2015-10-05
发表刊物：MATERIALS & DESIGN
收录刊物：SCIE、EI、Scopus
卷号：82
页面范围：91-97
ISSN号：0264-1275
关键字：High entropy alloy; Eutectic cell; Intermetallics; Annealing; Hardness
摘要：Bulk AlCrFeNiMo0.2 (in molar ratio) alloy ingot was prepared by vacuum induction melting and casting methods. The effects of annealing temperature variations (550-1050 degrees C) on the crystal structure, microstructure, and hardness were investigated. The hardness of the as-cast alloy was HV467, and the alloy exhibited a typical eutectic cell microstructure consisting of FeCrMo-rich solid solution (BCC structure) and NiAl-rich intermetallic compound (B2 structure). After annealing at 750-950 degrees C, a Mo-rich sigma phase precipitated from the FeCrMo-rich solid solution, and apparent annealing hardening appeared. The hardness increased from HV479 to HV542. The hardening of this alloy was attributed to the transformation of the BCC phase to the sigma phase. The sigma phase changed back to the BCC phase at 1050 degrees C and the hardness decreased to HV478 which was nearly equal to that of the as-cast alloy. Overall, the AlCrFeNiMo0.2 alloy exhibited excellent annealing softening resistance. (C) 2015 Elsevier Ltd. All rights reserved.