期刊
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
卷 15, 期 4, 页码 319-324出版社
MANEY PUBLISHING
DOI: 10.1179/136217109X12568132624208
关键词
Friction stir spot welding; Al alloy; Mg alloy; Lap shear strength; Microstructure; Interfacial layer
资金
- Japanese Ministry of Education, Science, Sports and Culture
- Materials Integration International Center of Education and Research at Tohoku University
In the present study, an attempt was made to join two dissimilar light metal alloys which are becoming increasingly familiar in the automotive industry, i.e. AA5083 aluminium alloy and AZ31 magnesium alloy, by the friction stir spot welding process. Lap welds were produced with various welding parameters, and interfacial microstructures and lap shear strengths of these welds were examined. Friction stir spot welding produced defect-free welds, even though a thick interfacial layer composed mainly of intermetallic compounds was present. The thickness of the interfacial layer did not appear to affect the lap shear strength of the weld, whereas the distribution of intermetallic compounds in the interfacial layer did so. Microstructural factors of the interface governing the lap shear strength of the weld were examined.
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