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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：Professor in Process Mechanics
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：力学与航空航天学院
学科：制造工艺力学. 工程力学. 计算力学
办公地点：综合实验1号楼619
联系方式：0411-84708432
电子邮箱：zhangz@dlut.edu.cn
The Simulation of Precipitation Evolutions and Mechanical Properties in Friction Stir Welding with Post-Weld Heat Treatments
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论文类型：期刊论文
发表时间：2017-12-01
发表刊物：JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
收录刊物：SCIE、EI
卷号：26
期号：12
页面范围：5731-5740
ISSN号：1059-9495
关键字：friction stir welding; mechanical property; post-weld heat treatment; precipitate evolution model; re-meshing model
摘要：A finite element model of friction stir welding capable of re-meshing is used to simulate the temperature variations. Re-meshing of the finite element model is used to maintain a fine mesh resolving the gradients of the solution. The Kampmann-Wagner numerical model for precipitation is then used to study the relation between friction stir welds with post-weld heat treatment (PWHT) and the changes in mechanical properties. Results indicate that the PWHT holding time and PWHT holding temperature need to be optimally designed to obtain FSW with better mechanical properties. Higher precipitate number with lower precipitate sizes gives higher strength in the stirring zone after PWHT. The coarsening of precipitates in HAZ are the main reason to hinder the improvement of mechanical property when PWHT is used.