Eulerian Modeling of Plasma-Pressure Driven Laser Impact Weld Processes

Gleason, Glenn; Sunny, Sumair; Sadeh, Sepehr; Yu, Haoliang; Malik, Arif

doi:10.1016/j.promfg.2020.05.039

Cited by 13 publications

(2 citation statements)

References 22 publications

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“…Wang et al [14] explored the flying speed of the flyr under different processes in laser impact welding, and verified the process window of LIW. Gleason et al [15] established a plasma-driven flyer model, which provided a scientific basis for subsequent exploration of LIW.…”

Section: Introductionmentioning

confidence: 99%

Variety of microstructure and mechanical properties along the laser impact welded interface

Wang

et al. 2023

Science and Technology of Welding and Joining

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Laser impact welding (LIW) is an attractive technique for thin film dissimilar materials solid-state welding. To understand the mechanism of laser impact welding, the wave character of wavy interfaces, the morphology of intermetallics, the diffusion phenomenon and the hardness along the welding direction were investigated with Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometer (EDS), and nanoindentation, respectively. There is a microstructure and mechanical property gradient not only along the welding direction, but also perpendicular to it. The variety of both microstructure and mechanical properties is the combined result of impact pressure and impact angle. The gradient of the nanoindentation demonstrated the variety of the strengthening mechanism nearby the weld interface. The study provides valuable knowledge for welding process understanding and control.

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Section: Introductionmentioning

confidence: 99%

Variety of microstructure and mechanical properties along the laser impact welded interface

Wang

et al. 2023

Science and Technology of Welding and Joining

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“…The characteristics of wavy morphologies are usually discussed with the help of high velocity oblique impact experiment whose results can only be imaged at the end of experiments which do not reveal the evolution processes 3 , 4 , 15 , 16 , not mentioning another issue of recovering sample without severe fragmentations under high velocity loading 17 . Although oblique impact processes can be exhibited by computer simulations, besides acquiring adequately fine mesh distributions, the accuracy of calculations is largely determined by different arithmetic of capturing material interface 15 , 18 – 20 . For KHI on metals, it is surprising that relevant simulations have not been shown for now but only theoretical analysis with traditional normal mode method which merely presents growth rate and involves impossibility of analytical treatments due to nonlinear governing equations and nonlinear constitutive relations of metal 5 , 18 .…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Kelvin–Helmholtz instability on metallic surface

Wang

et al. 2023

Sci Rep

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Kelvin–Helmholtz instability on metallic surface is relevant to intense oblique impact in many physical processes such as explosive welding, Inertial Confinement Fusion and planetary impact events. Evolution of instability results in the formation of wavy morphology leading to material bonding or even mixing. However, mostly due to lack method to describe the dynamic behavior, instability mechanism controlled by elastoplastic properties of metal remains elusive. Here, we introduce a theory to reveal the evolution characteristics aroused by tangential velocity. Our simulations find that the unstable metallic surfaces exhibit amplitude growth and tangential motion by overcoming the depression of yield strength to generate wavy morphology. For diverse loading velocities, corrugated surfaces and material properties, an instability boundary distinguishes all unstable evolutions. Our analytical method with scale-independent variables reproducing numerical findings reveals plentiful characteristics of instability in strength materials. For designed loading velocities and material in oblique impact experiment in laboratory, the property of corrugated surfaces becomes an important factor to determine instability evolution.

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