Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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The Weldability of the Dissimilar Magnesium Alloy Welded by Fiber Laser

파이버 레이저를 이용한 이종 마그네슘 합금의 용접성에 관한 연구

  • Kim, Jong-Do (Division of Marine Engineering, Korea Maritime University) ;
  • Kim, Young-Sik (ReSEAT Program, Korea Institute of Science and Technology Information) ;
  • Song, Mook-Keun (Graduate School, Korea Maritime University) ;
  • Lee, Jung-Han (Technical Institute of Sungwoo Hitech Co., LTD.)
  • 김종도 (한국해양대학교 기관공학부) ;
  • 김영식 (한국과학기술정보연구원 ReSEAT 프로그램) ;
  • 송무근 (한국해양대학교 대학원) ;
  • 이정한 (성우하이텍 기술연구소)
  • Received : 2012.11.27
  • Accepted : 2013.04.19
  • Published : 2013.04.30
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Abstract

Magnesium alloys have gained increased attention in recent years as the structural materials, because of their attractive properties such as good specific strength, excellent sound damping capability. However, to expand their applications, a reliable joining process is absolutely necessary. In this study, a CW fiber laser was used to investigate the lap weldability of sand casting and wrought magnesium alloys. The effect of defocused distance on lap weldability was examined, and it was found that spatters always generated at the around focused distance because of the high power density of the laser beam. Thus, defocused distance was required to obtain sound welds. In addition, the application of fillet welding was evaluated for minimizing the affect of sand casting magnesium alloy that have relatively poor weldability. As a result of this study, we could confirm good weldability without weld defects.

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References

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