Three-dimensional Monte Carlo simulation of discontinuous grain growth in HAZ of stainless steel during GTAW process |
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| Authors: | Yanhong Wei Yanli Xu Zhibo Dong Xiaohong Zhan |
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| Affiliation: | 1. Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China;2. State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China;1. Central Iron and Steel Research Institute, Beijing 100081, China;2. Shougang Jingtang United Iron and Steel Co. Ltd., Tangshan 063200, Hebei, China;1. Laboratorio de Sólidos Amorfos, INTECIN, Facultad de Ingeniería, Universidad de Buenos Aires – CONICET, Paseo Colón 850, C1063ACV Buenos Aires, Argentina;2. Laboratoire des Matériaux et du Génie Physique (CNRS UMR 5628), Grenoble Institute of Technology, MINATEC, Grenoble Cedex 1, France;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2. Pangang Group Panzhihua Steel and Vanagium Co., Ltd., Panzhihua 617000, Sichuan, China;1. College of Materials Science and Engineering, Hebei Province Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology, Tangshan 063009, Hebei, China;2. Shijiazhuang Iron & Steel Co. Ltd., Hebri Iron & Steel Group, Shijiazhuang 050031, Hebei, China;3. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, Hebei, China;1. School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China;2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, PR China |
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| Abstract: | The Monte Carlo (MC) simulations of grain growth in the heat affected zone (HAZ) of titanium alloys and ultra fine austenite steels are widely used. In single-phase alloys, the pinning effect of the grain boundary precipitates is one of the important factors to influence grain growth. However, it has not been considered in most of the simulations. In this study, both thermal pinning and precipitates pinning effects were taken into account to simulate grain growth in HAZ of austenite stainless steel SUS316 during gas tungsten arc welding (GTAW) process. By using heat transfer and fluid flow model, the thermal process of welding that influences grain structure evolution is obtained as well. The results of the simulation agree with the experiment and demonstrate that the grains in HAZ grow discontinuously when a large amount of carbides lie on the grain boundary. |
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