Experimental and numerical investigation of laser shock synchronous welding and forming of Copper/Aluminum

Wang, Xiao; Zhang, Hongfeng; Shen, Zongbao; Li, Jianwen; Qi, Qian; Liu, Huixia

doi:10.1016/j.optlaseng.2016.06.018

Cited by 15 publications

(1 citation statement)

References 24 publications

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“…In addition, a short element diffusion layer with width of approximately 2 μm emerges at the sheet/wire welding interface during shock welding, as shown in Figure 9 . A short element diffusion layer was also detected by Wang et al [ 24 ]. There are some advantages for element diffusion: on the one hand, element diffusion is advantageous to narrow the distance between two metal atoms and then keep a balance between attraction and repulsion.…”

Section: Resultsmentioning

confidence: 65%

Laser Indirect Shock Welding of Fine Wire to Metal Sheet

et al. 2017

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Abstract: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.

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Section: Resultsmentioning

confidence: 65%