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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
In situ observation on the solidification of Sn-10Cu hyperperitectic alloy under direct current field by synchrotron microradiography
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论文类型：期刊论文
发表时间：2017-10-15
发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS
收录刊物：SCIE、EI
卷号：721
页面范围：126-133
ISSN号：0925-8388
关键字：Intermetallics; Synchrotron radiation; Microstructure; X-ray diffraction
摘要：The structural evolution of peritectic solidification under the direct current (DC) field action, mainly on the morphological evolution of primary phase epsilon (Cu3Sn) and peritectic phase 11 (Cu6Sn5), is in situ observed by high resolution X-ray real-time imaging with synchrotron radiation. The ultimate solidification microstructures after experiencing the imaging experiment are investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS). It is found that the eta phase precipitates directly from parent liquid phase without experiencing corresponding peritectic reaction when the DC field of 20 A/cm(2) or 200 A/cm(2) is imposed during the solidification process of the Sn-10%Cu alloy. It means that the DC field has altered the phase transformation sequence and suppressed the nucleation of primary e phase. Meanwhile, the growing and dissolving behaviors of secondary dendrite arm for intermetallic compound Cu6Sn5 under the DC field action are also in situ observed and discussed. (C) 2017 Elsevier B.V. All rights reserved.