A new constitutive analysis of hexagonal close-packed metal in equal channel angular pressing by crystal plasticity finite element method |
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| Authors: | Hejie Li Andreas Öchsner Prasad K. D. V. Yarlagadda Yin Xiao Tsuyoshi Furushima Dongbin Wei Zhengyi Jiang Ken-ichi Manabe |
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| Affiliation: | 1.Department of Mechanical Engineering, Graduate School of Science and Engineering,Tokyo Metropolitan University,Hachioji,Japan;2.Griffith School of Engineering,Griffith University Gold Coast Campus,Southport,Australia;3.School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty,Queensland University of Technology,Brisbane,Australia;4.Institute of Health and Biomedical Innovation, Science and Engineering Faculty,Queensland University of Technology,Brisbane,Australia;5.Department of Mechanical and Biofunctional Systems, Institute of Industrial Science,The University of Tokyo,Meguro,Japan;6.School of Electrical, Mechanical and Mechatronic Systems, Faculty of Engineering and Information Technology,University of Technology,Sydney,Australia;7.School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences,University of Wollongong,Wollongong,Australia |
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| Abstract: | Most of hexagonal close-packed (HCP) metals are lightweight metals. With the increasing application of light metal products, the production of light metal is increasingly attracting the attentions of researchers worldwide. To obtain a better understanding of the deformation mechanism of HCP metals (especially for Mg and its alloys), a new constitutive analysis was carried out based on previous research. In this study, combining the theories of strain gradient and continuum mechanics, the equal channel angular pressing process is analyzed and a HCP crystal plasticity constitutive model is developed especially for Mg and its alloys. The influence of elevated temperature on the deformation mechanism of the Mg alloy (slip and twin) is novelly introduced into a crystal plasticity constitutive model. The solution for the new developed constitutive model is established on the basis of the Lagrangian iterations and Newton Raphson simplification. |
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