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论文类型：期刊论文

发表时间：2008-09-01

发表刊物：MATERIALS CHARACTERIZATION

收录刊物：SCIE、EI、Scopus

卷号：59

期号：9

页面范围：1279-1284

ISSN号：1044-5803

关键字：laser-GTA hybrid welding; magnesium alloy; steel; interface of Mg-Fe; oxide

摘要：A laser-GTA hybrid welding technique was chosen to study the weld of the dissimilar alloys of AZ31B Mg alloy and 304 steel. A lap joint was formed between the two. The weld penetration, which determines the mechanical properties of the welded joints, depends on the laser power. A transition zone formed at the interface of the Mg-Fe during laser-GTA hybrid welding and Mg element diffused into the Fe matrix by forming oxides and reacting in the transition. During tensile testing, the joints fractured at the interface between the Mg alloy and the steel. Metallic oxides produced at the Mg-Fe interface were the reason for the poor mechanical properties of the weld joints. (C) 2007 Elsevier Inc. All rights reserved.