Wang Xiao, Huang Tao, Luo Yapeng, Liu Huixia
School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China.
Materials (Basel). 2017 Sep 12;10(9):1070. doi: 10.3390/ma10091070.
The purpose of this paper is to present an advanced method for welding fine wire to metal sheet, namely laser indirect shock welding (LISW). This process uses silica gel as driver sheet to accelerate the metal sheet toward the wire to obtain metallurgical bonding. A series of experiments were implemented to validate the welding ability of Al sheet/Cu wire and Al sheet/Ag wire. It was found that the use of a driver sheet can maintain high surface quality of the metal sheet. With the increase of laser pulse energy, the bonding area of the sheet/wire increased and the welding interfaces were nearly flat. Energy dispersive spectroscopy (EDS) results show that the intermetallic phases were absent and a short element diffusion layer which would limit the formation of the intermetallic phases emerging at the welding interface. A tensile shear test was used to measure the mechanical strength of the welding joints. The influence of laser pulse energy on the tensile failure modes was investigated, and two failure modes, including interfacial failure and failure through the wire, were observed. The nanoindentation test results indicate that as the distance to the welding interface decreased, the microhardness increased due to the plastic deformation becoming more violent.
本文的目的是介绍一种将细丝焊接到金属板上的先进方法，即激光间接冲击焊接（LISW）。该工艺使用硅胶作为驱动板，使金属板朝着细丝加速以实现冶金结合。进行了一系列实验以验证铝板/铜线和铝板/银线的焊接能力。发现使用驱动板可以保持金属板的高表面质量。随着激光脉冲能量的增加，板/线的结合面积增加，焊接界面几乎是平的。能谱分析（EDS）结果表明，不存在金属间相，并且出现了一个短的元素扩散层，该扩散层会限制焊接界面处金属间相的形成。使用拉伸剪切试验来测量焊接接头的机械强度。研究了激光脉冲能量对拉伸破坏模式的影响，观察到两种破坏模式，包括界面破坏和通过细丝的破坏。纳米压痕试验结果表明，随着到焊接界面距离的减小，由于塑性变形变得更加剧烈，显微硬度增加。
