Numerical simulation and experimental investigation on densification,shape deformation,and stress distribution of Ti6Al4V compacts during hot isostatic pressing |
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| Authors: | Shun Zhou Bo Song Pengju Xue Chao Cai Jie Liu Yusheng Shi |
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| Affiliation: | 1.State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Technology,Huazhong University of Science and Technology,Wuhan,People’s Republic of China |
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| Abstract: | Hot isostatic pressing of metal powders involves a complex thermal and mechanical coupling process. A constitutive model based on Perzyna’s elastic-viscoplasticity equation was proposed, and a Lagrangian finite element method was applied to analyze the large deformation, nonlinear friction, powder flow, and densification behavior during hot isostatic pressing. The mechanical behavior of the powders was analyzed in terms of stress distribution. For comparison to the simulation results, the density, shape deformation, and residual stress of the specimens were evaluated using Archimedes’ principle, 3D measuring technology, and Empyrean X-ray diffractometer. |
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