Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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The Effect of Welding Condition on Tensile Properties of Friction Stir Welds of KS5J32 Al Alloy

KS5J32 Al합금 마찰교반접합부의 인장성질에 미치는 접합조건의 영향

  • 윤태진 (부산대학교 하이브리드소재솔루션 국가핵심연구센터) ;
  • 김상주 (부산대학교 하이브리드소재솔루션 국가핵심연구센터) ;
  • 김남규 (한국기계연구원 부설 재료연구소) ;
  • 송상우 (한국기계연구원 부설 재료연구소) ;
  • 강정윤 (부산대학교 하이브리드소재솔루션 국가핵심연구센터)
  • Received : 2011.10.07
  • Accepted : 2011.10.27
  • Published : 2011.09.30
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Abstract

The effect of welding condition on tensile properties of KS5J32 Al Alloy was investigated under various welding conditions. The 1.6 mm thick KS5J32 alloy sheets were joined by friction stir welding (FSW) technique with butt joint. The tool rotation speeds were 1000, 1250 and 1500 rpm, and the welding speeds were varied within the range from 100 to 600 mm/min. Voids mainly occurred at the advancing side of the tool probe, when the tool rotation speed was low, due to insufficient materials flow. When the weld pitch exceeded 0.4 mm/rev, voids were observed under all welding conditions and the area of voids increased with increasing weld pitch. For void-free specimens, fracture always occurred at base materials. However voids affected the location of fractures, base metal or welded zone, when the voids existed within the welds.

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References

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