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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 Tungsten on Microstructure and Mechanical Properties of CrFeNiV0.5W (x) and CrFeNi2V0.5W (x) High-Entropy Alloys
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论文类型：期刊论文
发表时间：2015-12-01
发表刊物：JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
收录刊物：SCIE、EI、Scopus
卷号：24
期号：12
页面范围：4594-4600
ISSN号：1059-9495
关键字：high-entropy alloys; mechanical properties; microstructure
摘要：CrFeNiV0.5W (x) and CrFeNi2V0.5W (x) (x = 0.25, 0.5, 0.75, and 1.0) high-entropy alloys were prepared by vacuum arc melting. The effects of W element on the microstructures and mechanical properties of these alloys were investigated. The experimental results indicated that the CrFeNiV0.5W (x) alloys were composed of sigma, FCC, and BCC phases. Although the microstructures of the CrFeNi2V0.5W (x) alloys were still constituted by FCC, BCC, and sigma phases, the volume fraction of the FCC phase increased significantly. Dendrite morphology was also observed in the CrFeNi2V0.5W (x) alloys. With the addition of W element, the hardness of the CrFeNiV0.5W (x) alloys declined from 869 to 633 HV, while the hardness of the CrFeNi2V0.5W (x) alloys increased from 226 to 305 HV. Moreover, the CrFeNi2V0.5W (x) alloys exhibited better compressive ductility than the CrFeNiV0.5W (x) alloys. This study was the first known incidence in which the FCC phase increased in the HEAs with a decrease of the valence electron concentration (VEC) value (i.e., the FCC phase of the CrFeNiV0.5W (x) alloys increased with the addition of the BCC-structured W elements).