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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
Mechanism of alloy microstructure globularisation during cooling slope process
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论文类型：期刊论文
发表时间：2014-10-01
发表刊物：MATERIALS RESEARCH INNOVATIONS
收录刊物：SCIE、EI
卷号：18
期号：6
页面范围：412-417
ISSN号：1432-8917
关键字：Semisolid process; Cooling slope; Globularisation mechanism
摘要：Cooling slope process is a simple method to produce feedstock materials for semisolid processing. When the melt is poured onto a cooling slope, a semisolid slurry with spheroidal microstructure can be obtained. In this work, the mechanism of alpha-Al globularisation during cooling slope process is investigated. It shows that the cooling slope process can be divided into two stages. The first stage occurs at the upper position of the slope plate and cooling of the melt domains at this area. At the second stage, the melt breaks dendrite arms while flowing on the plate, and globular solids are formed at lower position. The combined effects of heterogonous nucleation and dendrite fragmentation are the main mechanisms for globularisation of the alloy microstructure.