Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Effect of Welding Condition and Tool Shape on Defect Formation of Extruded AA6005 with Non-uniform Thickness using Load-Controlled Friction Stir Welding Technique

두께 불균일 AA6005 압출재의 하중제어 마찰교반접합에서 접합 조건과 툴 형상이 결함발생에 미치는 영향

  • Yoon, Tae-Jin (Pusan National Univ., Graduate School of Convergence Science) ;
  • Kang, Myung-Chang (Pusan National Univ., Graduate School of Convergence Science) ;
  • Jung, Byong-Ho (Pukyong National Univ., School of Mechanical Engineering) ;
  • Kang, Chung-Yun (Pusan National Univ., School of Materials Science and Engineering)
  • Received : 2013.12.11
  • Accepted : 2013.12.23
  • Published : 2013.12.31
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Abstract

Friction stir welding using aluminum alloys has been widely applied for transportation vehicles because of the light specific weight, which can be used to obtain sound joint and high mechanical properties. This study shows the effects of rotation speed, welding speed, welding load, and tool shape on defect formation with extruded AA6005, which is used for railway vehicle structures of non-uniform thickness welded by friction stir welding using load control systems. Optical microscopy observations and liquid penetrant testing of each FSW joint were carried out in order to observe defect formation. Two kinds of defects, that of probe wear and that of lack of penetration in the bottom of the welded zone, were observed. In the case of using a taper shaped tool, the defect free zone is very narrow, within 100 kgf; however, in case of using a cylindrical shape tool, the defect free zone is wider.

Keywords

References

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