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논문 기본 정보

자료유형
학술저널
저자정보
Won-Ik Cho (Bremer Institut für angewandte Strahltechnik GmbH) Suck-Joo Na (Xi’an Jiaotong University)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第38卷 第3號
발행연도
2020.6
수록면
235 - 240 (6page)

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초록· 키워드

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Numerical simulations of the multi-㎾ laser welding of structural carbon steel were conducted to analyze the effects of laser wavelength on fusion zone shape. For the heat and mass transfer analysis, the basic governing equations were utilized in addition to the volume-of-fluid (VOF) conservation equation to calculate the free surface boundary. Laser welding models that considered phenomena such as multiple reflections of the laser beam at the keyhole, absorption, recoil pressure, and shear stress and heat source by metal vapor generated were used as well. Two models: a general and a simplified model, which were both based on the Fresnel equations, were considered with the wavelengths of CO₂, disk, and green lasers for calculating of the laser absorptivity of the material. The difference found in the results of the general model and the simplified model in the range of the wavelengths considered, was negligible. In addition, the results obtained for disk laser welding and green laser welding did not exhibit any considerable difference in terms of their impact on the fusion zone shape.

목차

Abstract
1. Introduction
2. Methodology
3. Results and discussion
4. Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2020-581-000842333