A Study on Welding Characteristics of Laser Beam Coatings by Fe-Based Bulk Metallic Glass

Lee, Hanseop; Lim, Byung-Chul; Park, Sang-Heup

doi:10.14257/ijmue.2016.11.4.31

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2017

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“…As the advantages of high power intensity, fast welding speed, deep penetration, narrow affected zone and good flexibility, laser welding has been found wide use in modern industries like automobile engineering, nuclear power plant and spacecraft manufacturing [1,2]. Nevertheless, it is concerned that the welding defects generated in the weld affect the performance and quality of the welded joints seriously.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Modeling of Shielding Gas on the Welding Defects in the Fiber Laser Keyhole Welding

Liu¹,

Ai²,

Jiang³

et al. 2017

dtmse

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In this paper, a numerical model is proposed to investigate the keyhole dynamic behaviors and the formation process of hump. Both of the welding processes with and without shielding gas are calculated during the simulation. It is revealed that the hump generated in the weld is caused by the metal flows in the rear part of the keyhole aperture driven by the resultant force of surface tension, recoil pressure and buoyance force. The shielding gas can significantly change the fluid flows in the molten pool and hence suppress the formation of the hump. The proposed method is validated by the confirmation experiments and good agreement between the simulated and experimental results have been found.

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Section: Introductionmentioning

confidence: 99%

Simulation and Modeling of Shielding Gas on the Welding Defects in the Fiber Laser Keyhole Welding

Liu¹,

Ai²,

Jiang³

et al. 2017

dtmse

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A Study on Welding Characteristics of Laser Beam Coatings by Fe-Based Bulk Metallic Glass

Abstract: In this study, the mechanical properties and microstructure of a surface hardenings coating layers formed by laser cladding using bulk metallic glass (BMG)

Cited by 1 publication

References 5 publications

Simulation and Modeling of Shielding Gas on the Welding Defects in the Fiber Laser Keyhole Welding

Simulation and Modeling of Shielding Gas on the Welding Defects in the Fiber Laser Keyhole Welding

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