대한용접접합학회:학술대회논문집 (Proceedings of the KWS Conference)

대한용접접합학회 (The Korean Welding and Joining Society)
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Mg 합금의 제조 방법에 의한 FSW 접합성 평가

The Evaluation of Weldability for Different Manufactured Mg Alloys in FSW

  • 노중석 (포항산업과학연구원(RIST)) ;
  • 김홍주 (조선대학교 생산가공 공학과) ;
  • 장웅성 (포항산업과학연구원(RIST)) ;
  • 방국수 (부경대학교 소재프로세스 공학과)
  • 발행 : 2003.11.01
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초록

Hot-rolled and Extruded plates of AZ type magnesium alloys were successfully joined by friction stir welding(FSW). AZ31B-H24 and AZ61 plates with the thickness of 4mm were used, and the microstructural development in the stir zone were investigated using optical and scanning electron microscopes. The grain size of base metal and stir zone were investigated using the line-intersecter method. Hardness of the stir zone was remarkably increased due to very fine recrystallized grain structure both in AZ3l and AZ6l alloys. Tensile strengths of the FS welded Mg alloys AZ31 and AZ61 were strongly affected by formation of the intermetallic compounds, ${\beta}$-Al$\sub$12/Mg$\sub$17/.

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