Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)

The Korean Welding and Joining Society (대한용접접합학회)
권호 표지

Friction stir welding with back-bead to improve fatigue strength

이면비드를 가진 마찰교반용접에 대한 피로강도에 관한 연구

  • Rajesh, S.R. (Welding Research Center, Research Institute of Industrial Science and Technology) ;
  • Yun, Byeong-Hyeon (Welding Research Center, Research Institute of Industrial Science and Technology) ;
  • Kim, Heung-Ju (Welding Research Center, Research Institute of Industrial Science and Technology) ;
  • Kim, Teuk-Gi (Welding Research Center, Research Institute of Industrial Science and Technology) ;
  • Cheon, Chang-Geun (Welding Research Center, Research Institute of Industrial Science and Technology) ;
  • Jang, Ung-Seong (Welding Research Center, Research Institute of Industrial Science and Technology)
  • Published : 2007.11.15
Download PDF
⟨ Previous Next ⟩

Abstract

The fatigue experiments of friction stir welded Al-6061-T6 alloy with and with out back bead were performed to investigate the variation in fatigue strength and life of the Joint. It was found that there were always existed flaws at the roots of friction stir welds for the normal welding parameters and clamping conditions. In order to overcome this root flaws, friction stir welds with optimum back bead has been developed. The test results with root flaws and with back bead were compared. The fatigue life of weld with root flaws was 5-10 times shorter than that of the friction stir weld with back bead.

Keywords