Numerical simulation of residual stress in a stainless steel powder compact under hot isostatic pressing
Residual stress distribution in an AISI 316L stainless steel powder compact under hot isostatic pressing (HIP) was investigated by using finite element method (FEM). The thermal elasto-viscoplastic constitutive equations were established based on the Perzyna viscoplastic rheological theory. An ellipsoidal yield criterion was used for the porous compact during HIP process. The coupled thermo-mechanical calculation was solved by employing the incremental Newton-Raphson iterative solution strategy on a finite element analysis program (MSC.Marc). The results of the simulation indicate that the final compact is dominated by residual tension stress, and shear failure play an important role in cracks of the compact; it is also found that tension stress of the compact has a dramatic raise during the unloading stage of HIP progress. The simulated results are compared with an experiment and good agreement is found in cracks.
hot isostatic pressing (HIP) metal powder residual stress numerical simulation
LIU Guo-cheng SHI Yu-sheng WANG Ji-Wei WEI Qing-song
State Key Laboratory of Materials Processing and Die&Mould Technology, Huazhong University of Scienc
国内会议
长沙
英文
1-7
2010-06-19（万方平台首次上网日期，不代表论文的发表时间）