| Effect of welding speed on the material flow patterns in friction stir welding of AZ31 magnesium alloy |
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| 作者姓名： | ZHANG Hua Wu Huiqiang Huang Jihua LIN Sanbao WU Lin |
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| 作者单位： | [1]Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China [2]Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China [3]State Key Lab of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | The clear zigzag-line pattern on transverse cross sections can be used to explain the formation mechanism of the weld nugget when friction stir welded AZ31 magnesium alloy without any other insert material is used as mark. It provides a simple and useful method to research the joining mechanism of friction stir welding. The rotation speed is kept at 1000 r/min and the welding speed changes from 120 mm/min to 600 mm/min. The macrostructure on the transverse cross section was divided into several parts by faying surface. The results show that the shape and formation procedure of the weld nugget change with the welding speed. There are two main material flows in the weld nugget： one is from the advancing side and the other is from the retreating side. A simple model on the weld nugget formation of FSW is presented in this article.
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| 关 键 词： | AZ31镁合金 搅拌磨檫焊 焊接速度 物流类型 |
| 收稿时间： | 2005-12-28 |
Effect of welding speed on the material flow patterns in friction stir welding of AZ31 magnesium alloy |
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| ZHANG Hua Wu Huiqiang Huang Jihua LIN Sanbao WU Lin.Effect of welding speed on the material flow patterns in friction stir welding of AZ31 magnesium alloy[J].Rare Metals,2007,26(2):158-162. |
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| Authors: | ZHANG Hua Wu Huiqiang Huang Jihua LIN Sanbao WU Lin |
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| Affiliation: | 1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Jiangjun Road, Nanjing 210016, PR China;2. Technology Research Institute of Nanjing Chenguang Group Co., Ltd. (NCGC), China Aerospace Science and Industry Corporation (CASTC), 1 Zhengxue Road, Nanjing 210006, PR China |
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| Abstract: | The clear zigzag-line pattern on transverse cross sections can be used to explain the formation mechanism of the weld nugget when friction stir welded AZ31 magnesium alloy without any other insert material is used as mark. It provides a simple and useful method to research the joining mechanism of friction stir welding. The rotation speed is kept at 1000 r/min and the welding speed changes from 120 mm/min to 600 mm/min. The macrostructure on the transverse cross section was divided into several parts by faying surface. The results show that the shape and formation procedure of the weld nugget change with the welding speed. There are two main material flows in the weld nugget:one is from the advancing side and the other is from the retreating side. A simple model on the weld nugget formation of FSW is presented in this article. |
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| Keywords: | AZ31 magnesium alloy friction stir welding faying surface materials flow formation model |
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