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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：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
Real time investigation of the grain refinement dynamics in zinc alloy by synchrotron microradiography
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论文类型：期刊论文
发表时间：2015-05-05
发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS
收录刊物：SCIE、EI、Scopus
卷号：630
页面范围：60-67
ISSN号：0925-8388
关键字：Synchrotron radiation; ZA27; TiB2; Kinetics; Nucleation; Dendrite fragmentation
摘要：The grain refining performance of titanium diboride particles in zinc alloy was investigated by adding in situ formed Al-TiB2 master alloy into ZA27 alloy. The results showed that TiB2 particles could significantly refine the structure of ZA27. After adding 1.1% TiB2, the average grain size decreased markedly from 205.4 mu m to 65.8 mu m. To characterize the mechanism by which TiB2 refines the grain size, synchrotron microradiography technique was used for the first time to investigate the effect of TiB2 on the grain nucleation and growth kinetics. Real-time observations revealed that TiB2 particles refine ZA27 by facilitating heterogeneous nucleation, enhancing dendrite fragmentation and constraining the dendrite growth. (C) 2015 Elsevier B.V. All rights reserved.