Effect of welding speed on the material flow patterns in friction stir welding of AZ31 magnesium alloy
来源期刊：Rare Metals2007年第2期
论文作者：ZHANG Hua), Wu Huiqiang), Huang Jihua), LIN Sanbao), and WU Lin) ) Materials Science and Engineering School, University of Science and Technology Beijing, Beijing , China ) Beijing Institute of Astronautical Systems Engineering, Beijing , China ) State Key Lab of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin , China
文章页码：158 - 162
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.
ZHANG Hua1), Wu Huiqiang2), Huang Jihua1), LIN Sanbao3), and WU Lin3) 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
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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