Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2011-08-01

Journal: MATERIALS & DESIGN

Included Journals: EI、SCIE

Volume: 32

Issue: 7

Page Number: 3730-3735

ISSN: 0261-3069

Key Words: Welding; Microstructure; Destructive testing

Abstract: 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.