2008Characteristics of laser welded wrought Mg–Al–Mn alloy.pdfVIP

M A T E R I A L S C H A R A C T E R I Z A T I O N 5 9 ( 2 0 0 8 ) 1 7 9 9 – 1 8 0 4 Characteristics of laser welded wrought Mg–Al–Mn alloy ⁎ Yajie Quan , Zhenhua Chen, Zhaohui Yu, Xiaosan Gong, Mei Li School of Materials Science and Engineering, Hunan University, Changsha, Hunan, 410082, PR China A R T I C L E D A T A A B S T R A C T Article history: Magnesium alloys have gained increased attention in recent years as a structural metal Received 16 April 2008 because of their property merits, which necessitates the development of welding Accepted 9 May 2008 techniques qualified for applications in the aeronautic and automotive industries. Laser welding is known to be an excellent method for joining metals. In this paper, a 3 kW CO2 Keywords: laser beam was used to weld the wrought Mg–Al–Mn alloy. The characteristics of the Wrought Mg–Al–Mn alloy microstructure and the mechanical properties of the joints were analyzed by optical Precipitated particles microscopy (OM), energy dispersive spectrometry (EDS), scanning electron microscopy Tensile strength (SEM), tensile testing and hardness testing. The experimental results show that the wrought Microhardness Mg–Al–Mn alloy can be joined successfully using optimized welding conditions. The results Elemental analysis of tensile testing show that the highest ultimate tensile strength (UTS) of the joints is up to