Volume 27 Issue 4
Apr.  2012
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GAO Chao, CHENG Li, PENG Hua, SHEN Jing-sheng, QIU Chen-lin, LIU Yan-jie. Investigation of ultra-high cycle fatigue behavior of TC17 alloy at a frequency of 20kHz[J]. Journal of Aerospace Power, 2012, 27(4): 811-816.
Citation: GAO Chao, CHENG Li, PENG Hua, SHEN Jing-sheng, QIU Chen-lin, LIU Yan-jie. Investigation of ultra-high cycle fatigue behavior of TC17 alloy at a frequency of 20kHz[J]. Journal of Aerospace Power, 2012, 27(4): 811-816.

Investigation of ultra-high cycle fatigue behavior of TC17 alloy at a frequency of 20kHz

  • Received Date: 2011-05-22
  • Rev Recd Date: 2012-02-12
  • Publish Date: 2012-04-28
  • The bending fatigue system was developed using the piezoelectric ultrasonic fatigue testing technology and experimental investigation of the ultra-high cycles fatigue life for TC17 alloy subjected to bending fatigue deformation has been conducted.The experimental resultes show that the specimens were tested to failure in the range of 107-109 cycles and the fatigue limit decreases with the increasing number of cycles between 107 and 109 for R=-1.0 and there was no obvious fatigue limit.The S-N curve for TC17 is a continuous decline curve between 107 and 109 cycles.The fractographic study showes that fatigue failures are mostly initiated at the surface of the test specimens.When there are subsurface inclusions,fatigue cracks initiated from subsurface inclusions,and the composition of inclusions is mainly oxides of aluminums.

     

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