Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Statistical Distribution of Fatigue Crack Growth Rate for Friction Stir Welded Joints of Al7075-T651

Al7075-T651의 마찰교반용접된 접합부의 피로균열전파율의 통계적 분포

  • Ahn, Seok-Hwan (A+ LINC, Pukyong National University) ;
  • Kim, Seon-Jin (Department of Mechanical & Automotive Engineering, Pukyong National University)
  • 안석환 (부경대학교 A+ LINC 사업단) ;
  • 김선진 (부경대학교 기계자동차공학과)
  • Received : 2013.04.04
  • Accepted : 2013.06.25
  • Published : 2013.08.31
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Abstract

This paper deals with the effects of driving force and material properties on statistical distribution of fatigue crack growth rate (FCGR) for the friction stir welded joints of Al 7075-T651 aluminum plate. In this work, the statistical probability distribution of fatigue crack growth rate was analyzed by using our previous constant stress intensity factor range controlled fatigue crack growth test data. As far as this study are concerned, the statistical probability distribution of fatigue crack growth rate for the friction stir welded (FSWed) joints was found to evaluate the variability of fatigue crack growth rate for base metal (BM), heat affected zone (HAZ) and weld metal (WM) specimens. The probability distribution of fatigue crack growth rate for FSWed joints was found to follow well log-normal distribution. The shape parameter of BM and HAZ was decreased with increasing the driving force, however, the shape parameter of WM was decreased and increased with increasing the driving force. The scale parameter of BM, HAZ and WM was increased with the driving force.

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References

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