Characteristics of Joint Welded by Laser Welding of Aluminium-Lithium Alloy With Filler Wire
The characteristics of weld shape, microstructure and mechanical properties of 5A90 Al-Li alloy joint by laser welding (LBW) and laser welding with filler wire (LWFW) were studied. The results indicated that the microstructure of joint by LWFW was fine-grained layer and the equiaxed grain in most of seams, which were similar to the joint by LBW. Compared with the joint by LBW, the microstructure of joint by LWFW tended to fine, and the range of the columnar crystals zone was prone to decrease. The Microhardness of the joint by LWFW (92.57HV0.2) was lower than that by LBW (95.65HV0.2), but the uniformity was better. The ultimate tensile strength of the joint by LWFW was lower than that by LBW slightly, which reached to 73.03％ and 79.22％ of the base metal respectively. However, the elongation of the LWFW joint was higher than that of the LBW joint significantly, which reached to 38.65％ and 20.38％ of the base metal respectively. The microstructure and mechanical properties of 5A90 Al-Li alloy by LWFW were better than that by LBW.
al-li alloy laser beam welding (lbw) laser welding with filler wire (lwfw) weld shape microstructure mechanical properties
J.Yang X.Y.Li S.L.Gong L.Chen F.Xu
School of Material Science and Engineering, Beijing University of Technology, Beijing, P.R.China,Sci School of Material Science and Engineering, Beijing University of Technology, Beijing, P.R.China Science and Technology on Power Beam Processes Laboratory, Beijing Aeronautical Manufacturing Techno
国际会议
北京
英文
178-181
2010-10-25（万方平台首次上网日期，不代表论文的发表时间）