Formation of intermetallic compounds in Al and Mg alloy interface during friction stir spot welding
Formation of intermetallic compounds in Al and Mg alloy interface during friction stir spot welding
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DOI：
10.1016/j.intermet.2010.08.030
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发表时间：
2011-02-01
期刊：
影响因子：
4.4
通讯作者：
Jung, Seung-Boo
中科院分区：
文献类型：
--
作者：
Choi, Don-Hyun;Ahn, Byung-Wook;Jung, Seung-Boo
采用搅拌摩擦点焊技术，通过改变工具转速和工具作用时间，对铝板和镁板进行点焊，以研究焊接参数对铝镁合金反应的影响。利用光学显微镜、扫描电子显微镜和X射线衍射对界面微观结构和相进行了研究。通过拉伸试验评估了接头的力学性能。实验结果表明，在铝镁合金界面形成了金属间化合物。金属间化合物层的厚度随着工具转速和作用时间的增加而增加，并且对接头强度有显著影响。过厚的金属间化合物层会严重降低接头的力学性能。金属间化合物层主要包含Al₃Mg₂和Al₁₂Mg₁₇。© 2010 Elsevier Ltd. 版权所有。
The spot welding of Al plate to Mg plate was produced by friction stir spot welding using various tool rotation speed and duration time of the tool to investigate the effects of the welding parameters on the reaction of Al and Mg alloy. The interface microstructure and phase were investigated using optical microscopy, scanning electron microscopy and X-ray diffraction. The mechanical properties of the joints are evaluated using tensile test. Experimental results show that intermetallic compounds were formed in the interface of the Al and Mg alloys. The thickness of intermetallic compounds layer increases with increasing tool rotation speed and duration time, and has a significant effect on the strengths of the joints. Heavy thickness of intermetallic compounds layer seriously deteriorates the mechanical properties of the joints. The intermetallic compounds layer mainly contains Al3Mg2 and Al12Mg17 (C) 2010 Elsevier Ltd. All rights reserved.