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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 electro-negativity on the stability of topologically close-packed phase in high entropy alloys
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论文类型：期刊论文
发表时间：2014-09-01
发表刊物：INTERMETALLICS
收录刊物：SCIE、EI
卷号：52
页面范围：105-109
ISSN号：0966-9795
关键字：Alloy design; Crystallography; Phase stability; prediction
摘要：Topologically close-packed (TCP) phases with complex structures are often observed in high entropy alloys (HEAs). Currently, these TCP phases are garnering significant interest from both theoretical and experimental perspectives due to the ductility deterioration of the high strength HEAs. Alternatively, there are instances when TCP phases can actually benefit the mechanical performances of alloys, such as the wear resistance. Therefore, the stability of TCP phases should be taken into consideration in the alloy design. In this paper, the relationship between the TCP phase stability and the physicochemical/thermodynamic properties of alloying components in HEAs was systematically studied. The stability of TCP phases was found to correlate well with the electro-negativity difference (Delta X) for most of the reported HEAs. The stability of TCP phases is well delineated by the electro-negativity difference (Delta X): i.e., TCP phases are stable at Delta X > 0.133 except for some HEAs that contain a significant amount of aluminum. (C) 2014 Elsevier Ltd. All rights reserved.