High-Speed Friction Stir Welding of SiCp/Al–Mg–Si–Cu Composite
来源期刊：Acta Metallurgica Sinica2019年第6期
论文作者：Chen Wang Bei-Bei Wang Dong Wang Peng Xue Quan-Zhao Wang Bo-Lv Xiao Li-Qing Chen Zong-Yi Ma
文章页码：677 - 683
摘 要：A 17 vol% SiCp/Al–Mg–Si–Cu composite plate with a thickness of 3 mm was successfully friction stir welded（FSWed） at a very high welding speed of 2000 mm/min for the first time. Microstructural observation indicated that the coarsening of the precipitates was greatly inhibited in the heat-affected zone of the FSW joint at high welding speed, due to the significantly reduced peak temperature and duration at high temperature. Therefore, prominent enhancement of the hardness was achieved at the lowest hardness zone of the FSW joint at this high welding speed, which was similar to that of the nugget zone. Furthermore, the ultimate tensile strength of the joint was as high as 369 MPa, which was much higher than that obtained at low welding speed of 100 mm/min（298 MPa）. This study provides an effective method to weld aluminum matrix composite with superior quality and high welding efficiency.
Chen Wang1,2，Bei-Bei Wang1,2，Dong Wang2，Peng Xue2，Quan-Zhao Wang2，Bo-Lv Xiao2，Li-Qing Chen1，Zong-Yi Ma2
1. State Key Laboratory of Rolling and Automation,Northeastern University2. Shenyang National Laboratory for Materials Science,Institute of Metal Research, Chinese Academy of Sciences
摘 要：A 17 vol% SiCp/Al–Mg–Si–Cu composite plate with a thickness of 3 mm was successfully friction stir welded（FSWed） at a very high welding speed of 2000 mm/min for the first time. Microstructural observation indicated that the coarsening of the precipitates was greatly inhibited in the heat-affected zone of the FSW joint at high welding speed, due to the significantly reduced peak temperature and duration at high temperature. Therefore, prominent enhancement of the hardness was achieved at the lowest hardness zone of the FSW joint at this high welding speed, which was similar to that of the nugget zone. Furthermore, the ultimate tensile strength of the joint was as high as 369 MPa, which was much higher than that obtained at low welding speed of 100 mm/min（298 MPa）. This study provides an effective method to weld aluminum matrix composite with superior quality and high welding efficiency.
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