王同敏

个人信息Personal Information

教授

博士生导师

硕士生导师

主要任职:研究生院常务副院长

其他任职:辽宁省凝固控制与数字化制备技术重点实验室主任

性别:男

毕业院校:大连理工大学

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

办公地点:研究生院;材料科学与工程学院

联系方式:tmwang@dlut.edu.cn

电子邮箱:tmwang@dlut.edu.cn

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In Situ Tomographic Observation of Dendritic Growth in Mg/Al Matrix Composites

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论文类型:会议论文

发表时间:2019-01-01

收录刊物:EI、CPCI-S

页面范围:1561-1567

关键字:Metal matrix composites; Microstructural evolution; Dendrite; Nanoparticles; Tomography

摘要:Understanding the interaction of nano/micro-particles with evolving microstructures during solidification is critical for developing new materials with improved mechanical properties through either particulate reinforcement and/or via microstructural refinement. In this study, we investigate the influence of nanoparticles on the evolving dendrites in both Mg and Al based metal matrix composites via in situ synchrotron tomography. Ultrasonic treatment was applied during the raw material preparation to break the particle agglomeration. The solidification of primary dendrites was characterized and quantified. The results reveal the underlying physical mechanisms that enable nanoparticles to modify the grain size in both alloy systems. These insights into dendrite evolution help both to inform and validate numerical models of the solidification microstructures of metal matrix composites.