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Indexed by:期刊论文

Date of Publication:2011-10-01

Journal:INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES

Included Journals:Scopus、SCIE、EI

Volume:31

Issue:7

Page Number:660-665

ISSN No.:0143-7496

Key Words:Fracture mechanics; Lap-shear; Peel; Laser weld bonding

Abstract:This paper presents the results of recent investigations on laser seam weld bonding (LWB) of magnesium alloy AZ61 sheets. There are two types of LWB structures: perpendicular weld seam (LWB-PE) and parallel weld seam (LWB-PA). In this paper the differences between the two structures are compared and discussed. In tensile shear tests, both LWB-PE and LWB-PA joints can offer higher failure force than that of laser welding or adhesive bonding alone, and LWB-PA joint offers better performance than LWB-PE joint. This is because the weld seam can increase the peel resistance at the free end of the adhesive bonded part, where a stress concentration exists. Maximum T-Peel strengths of LWB joints depend on the laser seam weld. The LWB-PA joint has both the advantages of maximum failure force caused by laser weld and the peel displacement caused by adhesive, so a synergistic effect is obtained in energy absorption. (C) 2011 Elsevier Ltd. All rights reserved.