Joint performance in laser welding Al alloy with filler wire

来源期刊：中国有色金属学报(英文版)2005年第z2期

论文作者：陈彦宾 李俐群 彭小云 方俊飞 张雅利

文章页码：87 - 91

Key words：aluminum alloy； laser welding； filler wire； mechanical property

Abstract: CO₂ laser welding aluminum alloy with filler wire was studied. The results indicate that the problems in CO₂ laser welding of Al alloy, such as bad appearance of weld, easily excessive penetration and low strength, can be improved effectively by using laser welding with filler wire, and the maximum tensile strength of weld can reach 94% for the base metal. It also can be found that, the linear energy have great influence on the microstructure and mechanical properties of the joint. As the heat input increases, the cellular fir-tree crystals in the weld zone become sparse and the form of tensile fracture transforms from gliding fracture to brittle fracture.