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Materials 2017, 10(9), 1070;

Laser Indirect Shock Welding of Fine Wire to Metal Sheet

School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
Author to whom correspondence should be addressed.
Received: 27 July 2017 / Revised: 2 September 2017 / Accepted: 8 September 2017 / Published: 12 September 2017
(This article belongs to the Section Manufacturing Processes and Systems)
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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. View Full-Text
Keywords: laser indirect shock welding; wire; metal sheet; interface; tensile shear test; nanoindentation hardness laser indirect shock welding; wire; metal sheet; interface; tensile shear test; nanoindentation hardness

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Wang, X.; Huang, T.; Luo, Y.; Liu, H. Laser Indirect Shock Welding of Fine Wire to Metal Sheet. Materials 2017, 10, 1070.

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