Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Study on the Weldability of Magnesium Alloy by Laser Heat Source (II) - Mechanical Properties of laser-welded AZ31B-H24 and AZ31B-O -

레이저 열원을 이용한 마그네슘 합금의 용접성에 관한 연구 (II) - AZ31B-H24 및 AZ31B-O 레이저 용접부의 기계적 특성 -

  • Lee, Jung-Han (Technical Institute of Sungwoo Hitech Co., LTD.) ;
  • Kim, Jong-Do (Division of Marine Engineering, Korea Maritime University) ;
  • Lee, Mun-Yong (Technical Institute of Sungwoo Hitech Co., LTD.)
  • Received : 2012.10.16
  • Accepted : 2012.12.28
  • Published : 2012.12.31
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Abstract

Magnesium alloy sheet which is commercially available in the market presently is AZ31B, a Mg-Al-Zn three elements alloy. AZ31B is used by being classified into AZ31B-H24 and AZ31B-O depending on temper designation. In this study, AZ31B-H24 and AZ31B-O alloy sheets with 1.25mm thickness were butt-welded using CW Nd:YAG laser. And the effect of materials on mechanical properties was investigated by tensile and hardness tests. As a result of this study, regardless of materials, the butt-welded joint did not show a significant difference in tensile strength and hardness values. However, compared with the basemetal, the AZ31B-O showed more outstanding mechanical properties than AZ31B-H24, and that is because H24 material lost the effect of work hardening during welding.

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References

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