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论文类型：期刊论文

发表时间：2011-08-01

发表刊物：MATERIALS & DESIGN

收录刊物：SCIE、EI

卷号：32

期号：7

页面范围：3730-3735

ISSN号：0261-3069

关键字：Welding; Microstructure; Destructive testing

摘要：A novel weld-bonding hybrid process is carried out to join Mg alloy and Al alloy, and the technology combines a modified metal inert gas (MIG) spot welding process with adhesive bonding. The Mg base metal and the fusion zone are metallurgical connected by an Al-Mg transition layer with the thickness of 30-60 mu m. Single nugget of spot welded joint can offer high shear strength of 130 MPa, which reach 81% of that of Mg base metal. The increased strength is due to the intermetallic layer being formed at the region with low stress, so the joint fractures in an Al-rich dendritic region. Superior mechanical properties can be obtained by weld bonded joint, benefiting from the advantages of both welding and adhesive bonding. (C) 2011 Elsevier Ltd. All rights reserved.