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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
Structure simulation in unidirectionally solidified turbine blade by dendrite envelope tracking model(I): numerical modeling
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论文类型：期刊论文
发表时间：2006-04-01
发表刊物：TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
收录刊物：SCIE、EI、ISTIC
卷号：16
期号：2
页面范围：235-241
ISSN号：1003-6326
关键字：turbine blade; dendrite envelope tracking model; structure simulation; unidirectional solidification
摘要：A 3D dendrite envelope tracking model was developed for estimating the solidification structure of unidirectionally solidified turbine blade. The normal vector of dendrite envelope was estimated by the gradient of dendrite volume fraction, and growth velocity of the dendrite envelope (dendrite tips) was calculated with considering the anisotropy of grain growth. The solute redistribution at dendrite envelope was calculated by introducing an effective solute partition coefficient(k(e)). Simulation results show that the solute-build-up due to the rejection at envelope affects grain competition and consequently the solidification structure. The lower value of ke leads to more waved dendrite growth front and higher solute rejection. The model was applied to predict the structure of turbine-blade-shape samples showing good ability to reproduce the columnar and single grain structures.