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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
Effect of Ti content on microstructure and properties of TixZrVNb refractory high-entropy alloys
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论文类型：期刊论文
发表时间：2020-12-29
发表刊物：INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
卷号：27
期号：10
页面范围：1318-1325
ISSN号：1674-4799
关键字：high-entropy alloys; mechanical properties; low density; elevated temperature
摘要：This study aimed to investigate the microstructure and mechanical properties of TixZrVNb (x= 1, 1.5, 2) refractory high-entropy alloys at room and elevated temperatures. The TiZrVNb alloy consisted of the body-centered cubic (BCC) matrix with a small amount of V2Zr phase. The Ti1.5ZrVNb and Ti2ZrVNb alloys exhibited a single-phase BCC structure. At room temperature, the tensile ductility of the as-cast alloys increased from 3.5% to 12.3% with the increase in the Ti content. The TixZrVNb alloys exhibited high yield strength at 600 degrees C, and the ultimate yield strength was more than 900 MPa. Softening occurred at 800 degrees C, but the ultimate yield strength could still exceed 200 MPa. Moreover, the TixZrVNb alloys displayed low densities but high specific yield strengths (SYSs). The lowest density of TixZrVNb alloys was only 6.12 g/cm(3), but the SYS could reach about 180 MPa center dot cm(3)center dot g(-1), which is better than those of most reported high-entropy alloys (HEAs).