Microstructure and Mechanical Properties of Laser Welded Wrought Fine-grained ZK60 Magnesium Alloy

摘要：

　　Fine-grained ZK60 magnesium alloy sheets of 2.0 mm in thickness were successfully joined by laser beam welding (LBW).The effects of welding parameters including laser power and weld ing speed on the microstructures and mechanical properties of the joints were investigated.A sound bead, with the ultimate tensile strength (UTS) of 300 MPa and elongation of 12.0%, up to 92.5% and 65 % of the base metal, respectivdy, is obtained with the optimized welding parameters.No liquation cracking is visible in the partially melted zone (PMZ) owing to the inhibitory action of the fine dis persed precipitates and the fine-grained micro structure in the as-rolled magnesium ahoy sheets.The fusion zone (FZ) is featured with the equlaxed dendritic grains of the average grain size about 8 μm, which are similar to those in the heat affected zone (HAZ), and this contributes to the relatively high joint efficiency.

关键词： Laser beam welding ZK60 Fine-grain size Fusion zone Partially melted zone Heat affected zone

作者: Hongge Yan Qiang Zhao Ping Chen Jihua Chen Bin Su

作者单位: School of Materials Science and Engineering,Hunan University,Changsha,P.R.China,410082

会议类型: 国际会议

会议名称: The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)

会议地点: 昆明

会议语种:英文

页码: 118-123

在线出版日期: 2013-11-19（万方平台首次上网日期，不代表论文的发表时间）