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论文类型：期刊论文

发表时间：2011-10-01

发表刊物：INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES

收录刊物：Scopus、SCIE、EI

卷号：31

期号：7

页面范围：660-665

ISSN号：0143-7496

关键字：Fracture mechanics; Lap-shear; Peel; Laser weld bonding

摘要：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.