Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Fatigue Crack Growth Properties of Friction Stir Welded Dissimilar Aluminum Alloys

이종알루미늄합금 FSW 접합부의 피로균열진전 특성

  • Lee, Won-Jun (Department of Mechanical and Precision Engineering, Graduate School, Gyeongsang Nat'l Univ.) ;
  • Lee, Hyo-Jae (EMSCO INC.) ;
  • Kim, Hyung-Jin (Department of Mechanical System Engineering, Institute of Marine Industry, Gyeongsang Nat'l Univ.) ;
  • Park, Won-Jo (Department of Energy and Mechanical Engineering, Institute of Marine Industry, Gyeongsang Nat'l Univ.)
  • 이원준 (경상대학교 대학원 정밀기계공학과) ;
  • 이효재 ((주)엠스코) ;
  • 김형진 (경상대학교 기계시스템공학과, 해양산업연구소) ;
  • 박원조 (경상대학교 에너지기계공학과, 해양산업연구소)
  • Received : 2012.09.20
  • Accepted : 2013.02.14
  • Published : 2013.02.28
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Abstract

The presence of a crack can increase the local stress or strain, which can cause inelastic deformation and significantly reduce the life of a component or structure. Therefore, in this study, the fatigue crack growth (FCG) behaviors of friction stir welded Al 2024-T3 and Al 7075-T6 specimens were examined, with fatigue cracks growing parallel to the dynamically recrystallized zone at variable ${\Delta}K$ values and an R ratio of 0.3. In addition, the FCG values of the base metal Al 2024-T3 and Al 7075-T6 were tested under the same conditions and parameters as comparative groups. The results showed that compared with the base metal Al 2024 specimen, which had the best fatigue property, the welded specimen had only 88% of the fatigue cycles.

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References

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