Laser impact welding: Design of apparatus and parametric optimization

2015 ◽  
Vol 19 ◽  
pp. 118-124 ◽  
Author(s):  
Huimin Wang ◽  
Geoff Taber ◽  
Dejian Liu ◽  
Steve Hansen ◽  
Enam Chowdhury ◽  
...  
Keyword(s):  
Parametric Optimization ◽  
Impact Welding ◽  
Laser Impact ◽  
Laser Impact Welding

scholarly journals Simulation and Experimental Comparison of Laser Impact Welding with a Plasma Pressure Model

Metals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1196 ◽  
Author(s):  
Sepehr Sadeh ◽  
Glenn H. Gleason ◽  
Mohammad I. Hatamleh ◽  
Sumair F. Sunny ◽  
Haoliang Yu ◽  
...  
Keyword(s):  
Laser Beam ◽  
Numerical Simulations ◽  
Pressure Pulse ◽  
Weld Strength ◽  
Experimental Comparison ◽  
Lap Shear ◽  
Impact Welding ◽  
Laser Impact ◽  
Temporal Profiles ◽  
Laser Impact Welding

In this study, spatial and temporal profiles of an Nd-YAG laser beam pressure pulse are experimentally characterized and fully captured for use in numerical simulations of laser impact welding (LIW). Both axisymmetric, Arbitrary Lagrangian-Eulerian (ALE) and Eulerian dynamic explicit numerical simulations of the collision and deformation of the flyer and target foils are created. The effect of the standoff distance between the foils on impact angle, velocity distribution, springback, the overall shape of the deformed foils, and the weld strength in lap shear tests are investigated. In addition, the jetting phenomenon (separation and ejection of particles at very high velocities due to high-impact collision) and interlocking of the foils along the weld interface are simulated. Simulation results are compared to experiments, which exhibit very similar deformation and impact behaviors. In contrast to previous numerical studies that assume a pre-defined deformed flyer foil shape with uniform initial velocity, the research in this work shows that incorporation of the actual spatial and temporal profiles of the laser beam and modeling of the corresponding pressure pulse based on a laser shock peening approach provides a more realistic prediction of the LIW process mechanism.

Interface and Strength of Laser Impact Welding of Fe-Based Nanocrystalline Alloys to Aluminum

2020 ◽  
Vol 73 (5) ◽  
pp. 1199-1207
Author(s):  
Xiao Wang ◽  
Xiaojun Wang ◽  
Yapeng Luo ◽  
Jenn-Terng Gau ◽  
Feng Li ◽  
...  
Keyword(s):  
Nanocrystalline Alloys ◽  
Impact Welding ◽  
Laser Impact ◽  
Laser Impact Welding

scholarly journals Characteristics of Flyer Velocity in Laser Impact Welding

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 281 ◽  
Author(s):  
Huimin Wang ◽  
Yuliang Wang
Keyword(s):  
Laser Energy ◽  
Critical Parameters ◽  
Mechanism Study ◽  
Long Distance ◽  
Experimental Conditions ◽  
Before And After ◽  
Impact Welding ◽  
Laser Impact ◽  
Working Distance ◽  
Laser Impact Welding

The flyer velocity is one of the critical parameters for welding to occur in laser impact welding (LIW) and plays a significant role on the welding mechanism study of LIW. It determines the collision pressure between the flyer and the target, and the standoff working distance. In this study, the flyer velocity was measured with Photon Doppler Velocimetry under various experimental conditions. The laser energy efficiency was compared with measured flyer velocity for various laser energy and flyer thickness. In order to reveal the standoff working window, the peak flyer velocity and flyer velocity characteristic before and after the peak velocity and the flyer velocity was measured over long distance. In addition, the rebound behavior of the flyer was captured to confirm the non-metallurgical bonding in the center of the weld nugget in LIW. Furthermore, the flyer size and confinement layer effect on the flyer velocity were investigated.

scholarly journals Research Status and Prospect of Laser Impact Welding

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1444 ◽  
Author(s):  
Kangnian Wang ◽  
Huimin Wang ◽  
Hongyu Zhou ◽  
Wenyue Zheng ◽  
Aijun Xu
Keyword(s):  
Solid State ◽  
Welding Process ◽  
Research Progress ◽  
Weld Strength ◽  
Welding Parameters ◽  
Base Materials ◽  
Atomic Force ◽  
Impact Welding ◽  
Laser Impact ◽  
Laser Impact Welding

The demands for the connection between thin dissimilar and similar materials in the fields of microelectronics and medical devices has promoted the development of laser impact welding. It is a new solid-state metallurgical bonding technology developed in recent years. This paper reviews the research progress of the laser impact welding in many aspects, including welding principle, welding process, weld interface microstructure and performance. The theoretical welding principle is the atomic force between materials. However, the metallurgical combination of two materials in the solid state by atomic force but almost no diffusion has not been confirmed by microstructure observation. The main theories used to explain the wave formation in impact welding were compared to conclude that caved mechanism and the Helmholz instability mechanism were accepted by researchers. The rebound of the flyer is still a critical problem for its application. With proper control of the welding parameters, the weld failure occurs on the base materials, indicating that the weld strength is higher than that of the base materials. Laser impact welding has been successfully applied in joining many dissimilar materials. There are issues still remained unresolved, such as surface damage of the flyer. The problems faced by laser impact welding were summaried, and its future applications were proposed. This review will provide a reference for the studies in laser impact welding, aiming process optimization and industrial application.

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