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3D FEM simulation of multi-pass upsetting and stretching for TC11 alloy

WANG Zhong-tang1,DUAN Xiao-liang1,ZHANG Hai-yan2,SONG Hong-wu2,ZHANG Shi-hong2(1.School of Material Science and Engineering,Shenyang Ligong University,Shenyang 110168,China;2.Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)  
The finite element software DEFORM-3D was employed to simulate multi-pass upsetting and stretching of TC11 alloy in near β zone.The distribution of temperature and effective strain fields were investigated.Simulation results show that the optimal compression ratio of TC11 is 41% during multi-pass upsetting and stretching.The process of stretching is divided into two steps,and in each step,compression ratio is 50%.In the last pass,the workpiece should be upset to 210 mm first and rotated 180°,then upset to 140 mm.The initial coarse lamellar structure can be transferred to refined equaxied structure through multi-pass upsetting and stretching,which can provide eligible workpiece for the next forging process.
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