Laser Solutions (한국레이저가공학회지)

Korean Society of Laser Processing (한국레이저가공학회)
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A study on the microstructure and micro-hardenss distribution in laser welded AZ31 magnesium alloy

AZ31 마그네슘합금 레이저 용접부의 미세조직 및 미소경도의 분포에 관한 연구

  • Choi, Y.H. (Department of Materials Science and Metallurgical Engineering, Sunchon University) ;
  • Lee, M.Y. (Advanced Metallic Material Research Department, RIST) ;
  • Choi, S.H. (Department of Materials Science and Metallurgical Engineering, Sunchon University)
  • 최영환 (순천대학교 공과대학 재료.금속공학과) ;
  • 이목영 (포항산업과학연구원) ;
  • 최시훈 (순천대학교 공과대학 재료.금속공학과)
  • Received : 2012.06.26
  • Accepted : 2012.09.21
  • Published : 2012.09.30
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Abstract

The laser weld of AZ31 magnesium alloy was characterized with OM, EBSD and micros vickers hardness tester in experiment. EBSD analysis and micro-hardness measurements were carried out at the three regions (Equiaxed Zone, Columnar Dendrite Zone, Base Metal) of the welded AZ31Mg alloy sheets. The magnesium alloy show the rectangular shape bead in laser weld. EBSD analysis revealed that the three regions show the heterogeneous distribution of grain size and microtexture. Micro-hardness measurement also revealed that the heterogeneous distribution of microstructure contributed to the heterogeneous micro-hardness distribution in the three regions.

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