期刊
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
卷 19, 期 2, 页码 111-118出版社
MANEY PUBLISHING
DOI: 10.1179/1362171813Y.0000000168
关键词
Aluminium; Copper; Dissimilar welding; Lap welding; Single mode fibre laser; Intermetallic compounds; Weldability; Extremely high welding speed
Conventional fusion welding of aluminium and copper dissimilar materials is difficult because of poor weldability arising from the formation of brittle intermetallic compounds on the weld zone as well as different chemical, mechanical and thermal properties of welded joints. Joining of Al and Cu plates or sheets offers a metallurgical challenge due to unavoidable formation of brittle intermetallic compounds. Therefore, it is necessary to effectively suppress the formation and growth of Al-Cu intermetallic compounds. For welding of dissimilar Al and Cu sheets, no systematic work has been conducted to reduce these defects. Thus, this paper focuses on the effect of welding speed on the quality of a lap weld joint in the Al and Cu sheets with a single mode fibre laser. It was found that consequently sound strong weld joints could be produced by the formation of intermetallic compounds in the interface zone at extremely high speeds.
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