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Effects of Tool Rotation and Transition Speed during Friction Stir Welding of Al 7075-T651 Alloy

Al 7075-T651의 마찰교반 용접에 대한 회전속도와 이송속도의 영향

  • 한민수 (목포해양대학교 기관시스템공학부 대학원) ;
  • 전정일 (신양금속주식회사 생산관리팀) ;
  • 장석기 (목포해양대학교 기관시스템공학부 대학원)
  • Published : 2007.04.01

Abstract

The 7075-T651 Al alloy was welded by friction stir welding. Microstructure, macro behaviors and fracture type in the nugget, thermo-mechanically affected zone(TMAZ) and heat affected zone(HAZ) of the welded part were compared to base metal. The microsturctures of nugget zone were compared with tool rotation speeds and various tool transition speed. When the rotation speeds were decreased and transition speeds were increased, the hardness of nugget zone were decreased. Also, the optimal microstructure was observed at the low rotation speed of 800rpm and the high transition speed of 124mm/min. The transgranular dimple and quasi-cleavage at fractured part of nugget zone were investigated.

Keywords

Friction Stir Welding(FSW);Heat Affect Zone(HAZ);Thermo-Mechanically Affected Zone(TMAZ);Nugget;Base Metal(BM)

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  2. Friction Stir Welding of 7075-T651 Aluminum Plates and Its Fatigue Crack Growth Property vol.35, pp.10, 2011, https://doi.org/10.3795/KSME-A.2011.35.10.1347
  3. Mechanical Characteristics and Microstructure on Friction Stir Welded Joints with 6061-T6 Aluminium Alloy vol.33, pp.7, 2009, https://doi.org/10.3795/KSME-A.2009.33.7.693