자유표면변형을 고려한 저에너지밀도 및 고에너지밀도 레이저 용접공정 통합 해석A Unified Analysis of Low-Power and High-Power Density Laser Welding Processes with Evolution of Free Surface
- Other Titles
- A Unified Analysis of Low-Power and High-Power Density Laser Welding Processes with Evolution of Free Surface
- Authors
- 하응지; 김우승
- Issue Date
- Oct-2005
- Publisher
- 대한기계학회
- Keywords
- Laser Welding; Free Surface; Marangoni Convection; Keyhole; Knudsen Layer; Recoil Pressure; 레이저 용접; 자유표면; 마랑고니 대류; 키홀; Knudsen 층; 증발압력
- Citation
- 대한기계학회논문집 B, v.29, no.10, pp.1111 - 1118
- Indexed
- KCI
- Journal Title
- 대한기계학회논문집 B
- Volume
- 29
- Number
- 10
- Start Page
- 1111
- End Page
- 1118
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/46238
- ISSN
- 1226-4881
- Abstract
- In this study, a unified numerical investigation has been performed on the evolution of weld pool and key-hole geometry during low-power and high-power density laser welding. Unsteady phase-change heat transfer and fluid flow with the surface tension are examined. The one-dimensional vaporization model is introduced to model the overheated surface temperature and recoil pressure during high-power density laser welding. It is shown that Marangoni convection in the weld pool is dominant at low-power density laser welding, and the keyhole with thin liquid layer and the hump are visible at high-power density laser welding. It is also shown that the transition from conduction welding to penetration welding for iron plate exists when the laser power density is about 106W/cm2.
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Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MECHANICAL ENGINEERING > 1. Journal Articles
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