온간 쇼트피닝에 의한 압축응력의 변화
The Improvement of Compressive Residual Stress by Warm Shot Peening
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Abstract
The requirements of getting spring steel with higher fatigue strength have been increased to achieve the weight reduction of a vehicle. As the possible increment in fatigue strength by using the conventional shot peening treatment is found to be limited, it is necessary to modify the shot peening treatment. In this study, to investigate the effects of warm shot peening on increasing fatigue strength, tests are conducted on spring steel SAE9524. By the results of rotating bending fatigue tests, the fatigue strength increases up to 23.8% in warm shot peening specimens at 200oC compared with conventional shot peening. The major reason why the warm shot peening is effective to the improvement of fatigue strength is the increment of the compressive residual stress, which can be effectively formed by shot peening under the condition of warm temperature than room temperature.
참고문헌 (9)
- T. Akira,, "Study on Warm Shot Peening for Suspension Coil Spring Society of Automotive Engineers" (1999)
- Iida, "Dent and Affected Layer Produced by Shot Peening of the 2nd International Conference on Shot Peening", pp.283~292 (1984)
- .M. C. Sharma, "Assessment of over Peening by Time on Fatigue Behavior of Spring Steel", pp.1397~1402 (1996)
- 신용승, "쇼트피닝한 SCM 22강의 피로특성평가", pp.126~131 (1998)
- 이종규, "피로강도 및 수명에 미치는 Shot Peening에 의한 잔류응력의 영향", pp.1498~1506 (1997)
- Eckersley, "Shot Peening Plays a Vital Roll in Rejuvenation of Aging Aircraft Institute for Industrial Technology Transfer International", pp.241~255 (1991)
- Ericsson, "Relaxation of Shot Peening Induced Compressive Stress During Fatigue of Notched Steel Samples of the 2nd International Conference on Shot Peening", pp.241~248 (1984)
- A, "Effect of Shot Peening on the Fatigue Life of Axially Loaded Notched Components of the 4th International Conference on Shot Peening", pp.349~358 (1993)
- W. Andreas,, "Effects of Stress and Warm Peening of AISI 4140 on Fatigue Life", 71(8), pp.316~321 (2000)