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.

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.

Solid State Welding Process for Aerospace Components

2015 ◽  
Vol 1119 ◽  
pp. 597-600
Author(s):  
Hyun Ho Jung ◽  
Ye Rim Lee ◽  
Jong Hoon Yoon ◽  
Joon Tae Yoo ◽  
Kyung Ju Min ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Solid State ◽  
Structural Integrity ◽  
Welding Process ◽  
Diffusion Welding ◽  
Intimate Contact ◽  
Friction Stir ◽  
Base Materials ◽  
Welding Processes ◽  
And Diffusion

Since solid state welded joint is formed from an intimate contact between two metals at temperatures below the melting point of the base materials, the structural integrity of welding depends on time, temperature, and pressure. This paper provides some of examples of friction stir welding and diffusion welding process for aerospace components. Friction stir welding process of AA2195 was developed in order to study possible application for a large fuel tank. Massive diffusion welding of multiple titanium sheets was performed and successful results were obtained. Diffusion welding of dissimilar metals of copper and stainless steel was necessary to manufacture a scaled combustion chamber. Diffusion welding of copper and steel was performed and it is shown that the optimum condition of diffusion welding is 7MPa at 890°C, for one hour. It is shown that solid state welding processes can be successfully applied to fabricate lightweight aerospace parts.

Laser Transmission Welding of Thermoplastics—Part II: Experimental Model Validation

2007 ◽  
Vol 129 (5) ◽  
pp. 859-867 ◽  
Author(s):  
James D. Van de Ven ◽  
Arthur G. Erdman
Keyword(s):  
Polyvinyl Chloride ◽  
Welding Process ◽  
Weld Strength ◽  
Average Error ◽  
Welding Parameters ◽  
Laser Transmission Welding ◽  
Weld Width ◽  
Additional Information ◽  
Primary Model ◽  
Clamping Pressure

Two laser transmission welding experiments involving polyvinyl chloride are presented that aim to validate a previously presented welding model while helping to further understand the relationship between welding parameters and weld quality. While numerous previous research papers have presented the results of laser welding experiments, there exists minimal work validating models of the welding process. The first experiment explores the interaction of laser power and welding velocity while the second experiment explores the influence of clamping pressure. Using the weld width as the primary model output, the agreement between the welding experiments and the model have an average error of 5.6%. This finding strongly supports the validity of the model presented in Part I of this two paper set (Van de Ven and Erdman, 2007, ASME J. Manuf. Sci. Eng., 129, pp. 849–858). Additional information was gained regarding the operating window for laser transmission welding and the thermal decomposition of polyvinyl chloride. Clamping pressure was found to provide a small, but not statistically significant, influence on the visual appearance, weld width, and weld strength.

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

An Investigation about Welding Parameters of Polypropylene Matrix Composite

2015 ◽  
Vol 729 ◽  
pp. 67-72
Author(s):  
Umit Huner ◽  
E. Selcuk Erdogan
Keyword(s):  
Matrix Composite ◽  
Welding Process ◽  
Break Point ◽  
Heating Time ◽  
Inorganic Materials ◽  
Weld Strength ◽  
Welding Parameters ◽  
Butt Welding ◽  
Base Strength ◽  
Polypropylene Matrix

This paper presents an experimental investigation of heated tool welding of polypropylene matrix composite. The goals of this paper are to investigate the issues of local changes of welding strength that depends on heating time. For experimental procedure, specimens were injection molded as ISO tensile test specimens and matrix was reinforced by organic and inorganic materials. In addition, welding of specimens was carried out by non-contact heated tool butt welding process. Within the range of the weld process parameters were investigated, the highest weld strength dependent on heating time was achieved of the order of 94% to the base strength of the material. And then these specimen’s maximum welding strengths and energy at break point properties that were depend on heating time have been compared.

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