Finite element analysis of the plastic deformation in tandem process of simple shear extrusion and twist extrusion |
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| Affiliation: | 1. Dept. Mater. Sci. Eng., Pohang Univ. Sci. Tech., Pohang, South Korea;2. Dept Mater. Sci. Eng., Shiraz Univ., Shiraz, Iran;3. Inst. Nat. Acad. Sci. Ukraine, Donetsk, Ukraine;1. Structural Integrity Group, Escuela Politécnica Superior, Avenida Cantabria s/n, 09006 Burgos, Spain;2. Civil Engineering Department, University of Burgos, Calle Villadiego s/n, 09001 Burgos, Spain;1. School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China;2. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore;3. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China;1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;2. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA;1. School of Physics Science and Technology, Yangzhou University, Yangzhou 225002, PR China;2. State Key Laboratory of Bioelectronics and School of Electronic Science and Engineering, Southeast University, Nanjing 210096, PR China;1. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;2. Ministry of Education (MOE), Key Laboratory of Special Functional Materials and Technology, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | Recently, simple shear extrusion (SSE) and twist extrusion (TE) are introduced to fabricate ultrafine grained bulk rod metallic materials. The SSE and TE processes generate significant deformation inhomogeneity, with higher and lower strains in the center, respectively, which easily causes mechanical instability of the materials. In this study, to overcome this deformation inhomogeneity problem in SSE and TE, a tandem process of SSE and TE (TST) is suggested. The finite element method is applied for plastic deformation behavior during the TST process. The results demonstrate that the TST process can produce relatively homogeneously deformed materials. In particular, the effects of back pressure and processing order on the plastic deformation behaviors in the TST process are systematically analyzed. |
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| Keywords: | Severe plastic deformation Twist extrusion Simple shear extrusion Finite element analysis Back pressure |
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