Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Optimum Shot Peening Condition for Al7075-T6

AL7075-T6의 최적 쇼트피닝 조건에 관한 연구

  • Published : 2003.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

Shot peening process is most often used to improve the fatigue properties of metal parts, In order to achieve an optimum, repeatable, and reliable fatigue enhancement from the shot peening process, the important shot peening parameters must be optimized, In this paper, the optimum peening intensity(Almen intensity) condition is investigated by experiment. Rotary bending fatigue test has been adopted to investigate the effects of optimum peening on the fatigue characteristics, Experimental results show that the fatigue strength and fatigue life has been tremendously increased by optimum-peening treatment. However, the fatigue strength and fatigue life has been decreased by under or over peening.

쇼트피닝 가공은 금속부품의 피로특성 향상을 위해 대부분 널리 이용되고 있는 방법이다. 쇼트피닝 가공에 있어 재현성이 있고 신뢰할 수 있는 최적화된 피로특성 증가를 위해 가장 중요한 점이 쇼트피닝 변수 조절이다. 본 논문에서는 최적 피닝강도(알멘강도) 조건에 대한 실험적인 연구가 수행되었다. 피로 특성에 관한 최적피닝의 효과를 검토하기 위하여 회전굽힘피로시험법을 채택하였다. 실험 결과 피로강도와 피로수명이 최적피닝 조건에 의해 크게 증가하였으나 언더피닝 및 오버피닝의 경우에는 감소함을 보였다.

Keywords

References

  1. Aoki, H., Nagashima. E., and Miura. T., "Effect of Shot Peening Conditions on Fatigue Strength of Carburized Steel," The 4th ICSP, 1990, pp.513-518
  2. Bergstron. J., and Ericsson. T., "Relaxation of Shot Peening Induced Compressive Stress During Fatigue of Notched Steel Samples," The 2nd ICSP, 1984, pp.241-248
  3. Hilpert. M., and Wagner. L., "Effect of Mechanical Surface Treatments on The Fatigue Behavior of the High-Strength Magnesium Alloy AZ 80, Magnesium Alloys and Their Applicaions," DGM, 1998, pp.409-414
  4. Dorr. T., Hilpert. M., Bechmerhagen. P., Kiefer. A., and Wagner. L., "Influence of Shot Peening on Fatigue Performance of High-Strength Aluminium and Magnesium Alloys," The 7th ICSP, 1999, pp.153-160
  5. Drechsler. A., Kiese. J., and Wagner. L., "Effects of Shot Peening and Roller-burnishig on Fatigue Performance of Various Titanium Alloys," The 7th ICSP, 1999, pp.145-152
  6. Iida. K., "Dent and Affected Layer Produced by Shot Peening," The 2nd ICSP, 1984, pp.283-292
  7. Al-Hassani., S.T.S., "Mechanical Aspects of Residual Stress Development in Shot Peening," The 4th ICSP, 1990, pp.583-602
  8. "SAE HAND BOOK PART 1 MATERIALS PARTS AND COMPONENTS," 1976, pp. 9.7-9.8
  9. Eckersley, J. S., "Shot Peening Plays a Vital Roll in Rejuvenation of Aging Aircraft," Shot Peening Theory and Application, Institute for Industrial Technology Transfer International, 1991, pp.241-255