Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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VHCF Characteristics of A7075-T651 under Pressure Variation by Shot Peening Treatment

쇼트 피닝의 압력변화에 따른 A7075-T651재의 VHCF 피로특성

  • Suh, Chang-Min (School of Mechanical Engineering, Kyungpook National University) ;
  • Kim, Cheol (School of Mechanical Engineering, Kyungpook National University) ;
  • Kim, Tae-Joon (Gyeongbuk Hybrid Technology Institute)
  • 서창민 (경북대학교 기계공학부) ;
  • 김철 (경북대학교 기계공학부) ;
  • 김태준 (경북하이브리드부품연구원)
  • Received : 2011.12.01
  • Accepted : 2011.12.23
  • Published : 2011.12.31
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Abstract

In this paper, the fatigue characteristics of shot peened A7075-T651 alloy were compared with those of the specimens without the shot peening. The multi-spindle and single-spindle rotating bending fatigue testing machines were employed for the evaluation. Shot peening (SP) with various pressure (5 psi, 10 psi, 15 psi, 25 psi and 35 psi) were used in this test. In order to investigate the effect of the applied pressure during the SP, we carried out the surface roughness test, compressive residual stress test, hardness test, tensile test, VHCF (Very high cycle fatigue) test and SEM observation. SP induced the formation of remarkable compressive residual stress from the surface to certain depth of sample by means of the plastic deformation. The surface hardness and the fatigue characteristics of the specimens were also modified by the SP. According to the S-N curves, fatigue lives of shot peended sample with 25 psi measures 50 times higher than that of the untreated sample. The fatigue lives of shot peened sample with 15 psi and 35 psi measure approximately 10 times higher than that of the untreated ones.

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References

  1. Barsom, J.M. and Rolfe, S.T. (1999). "Fracture and Fatigue Control in Structure", Buttworth Heinemann, 3rd Edition, pp 163-192.
  2. Cheng, S.K., Lee, S.H. and Chung, S.C. (2001). "Effect of the Peening Intensity by Shot peening" Transactions of the KSME (A), 25 (10), pp 1590-1596.
  3. JIS Z 2274, Method of Rotating Bending Fatigue Testing of Metals.
  4. Knott, J.F (1979). Fundamentals of Fracture Mechanics, W. Collins and Co. Ltd, Edition, pp 234-245.
  5. Lee, C.J., Murakami, R.I. and Suh, C.M. (2010). "Fatigue Properties of Aluminum Alloy (A6061-T6) with Ultrosonic Nano-Crystal Surface Modification Journal of Modern Physics B, Vol 24, pp 2512-2517. https://doi.org/10.1142/S0217979210065180
  6. Pyun, Y.S., Han, C.H. and Azuma, N. (2001). "Development of an Automated Super Surface Finishing System for the 3D Sculptured Surface of Model and Dies using Ultrasonic Micro Burnishing Technology", Processing of the 32nd ISR.
  7. Sakai, T., Sato, Y., Nagano, Y., Takeda, M. and Oguma, N. (2006), "Effect of Stress Ratio on Long Life Fatigue Behavior of High Carbon Chromium Bearing Steel under Axial Loading", Int. J. of Fatigue 28, pp 1547-1554. https://doi.org/10.1016/j.ijfatigue.2005.04.018
  8. Shiozawa, K. and Lu, L. (2002). "Very High-Cycle Fatigue Behaviour of Shot-Peened High-Carbon-Chromium Bearing Steel" Fatigue & Fracture of Engineering Materials & Structure, 25 (8-9), pp 813-822. https://doi.org/10.1046/j.1460-2695.2002.00567.x
  9. Stephens, R.I., Fatemi, A., Stephens, R.R. and Fuchs, H.O. (2001). Metal Fatigue in Engineering, Wiley interscience Pub, 2nd Edition, pp 59-89.
  10. Suh, C.M. and Kitagawa, H. (1985), "Fatigue Microcracks in a Low Carbon Steel", Fatigue Fract. Engng. Mater. Struct., Vol 8-2, pp 193-203. https://doi.org/10.1111/j.1460-2695.1985.tb01203.x
  11. Suh, C.M. and Kitagawa, H. (1987). "Crack Growth Behaviour of Fatigue Microcracks in Low Carbon Steels" Fatigue Fract. Engng. Mater. Struct.: Vol 9-6, pp 409-424. https://doi.org/10.1111/j.1460-2695.1987.tb00468.x
  12. Suh, C.M., An, Y.D., Pyun, Y.S., Cho, L.H., Suh, M.S. (2011). "Improvement of VHCF properties of AISI 1045, 4137, 52100 & H13 steel by UNSM treatment", 2011년도 한국해양과학기술협의회 공동학술대회, pp 1574-1579.
  13. Suh, C.M., Hwang, J.K., Son, K.S. and Jang, H.K. (2005), "Fatigue Characteristics of Nitrided SACM 645 according to the Nitriding Condition and Notch" Materials Science and Engineering A 392, pp 31-37 https://doi.org/10.1016/j.msea.2004.07.066
  14. Suh, C.M., Song, G.H., Suh, M.S. and Pyoun, Y.S. (2007). "Fatigue and Mechanical Characteristic of Nano-Struc tured Tool Steel by Ultrasonic Cold Forging Technology", Materials Science and Engineering A 443, pp 101-106. https://doi.org/10.1016/j.msea.2006.08.066
  15. Suh, C.M., Yoon, K.B. and Hwang, N.S. (1995), "A Simulation of the Behavior of Multi-Surface Fatigue Crack in Type 304 Stainless Steel Plate", Fatigue Fract. Engng. Mater. Struct., Vol 18-4, pp 515-525. https://doi.org/10.1111/j.1460-2695.1995.tb01193.x
  16. Torres, M.A.S. and Voorwald, H.J.C. (2002), "An Evaluation of Shot Peening, Residual Stress and Stress Relaxation on The Fatigue Life of AISI 4340 Steel", International Journal of Fatigue, 24 (8), pp 877-886. https://doi.org/10.1016/S0142-1123(01)00205-5
  17. Wanger, L. (1999). "Mechanical Surface Treatments on Titanium, Aluminum and Magnesium Alloys," Materials Science & Engineering A pp 263-270.
  18. Zhang, P. and Lindemann, J. (2005). "Influence of Shot Peening on hIgh Cycle Fatigue Properties of The High-Strength Wrought Magnesium Alloy AZ80" Scripta materialia, 52 (6), pp 485-490. https://doi.org/10.1016/j.scriptamat.2004.11.003
  19. 박경동, 진영범, 박형동 (2004), "쇼트피닝 가공된 해양구조용강의 피로파괴에 미치는 응력비의 영향" 한국해양공학회지, 제18권, 제5호, pp 43-49.
  20. 심동석, 이승호, 이명호 (2004), "균열진전에 대한 쇼트피닝 효과" 한국해양공학회지, 제18권, 제6호, pp 91-95.

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