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Abstract
Austenitic stainless steel cannot be hardened by any form of heat treatment, in fact, quenching from 10000C merely softens them. They are usually cold worked to increase the hardness. Shot peening is a cold working process that changes micro-structure as well as residual stress in the surface layer. In the present work, the compressive residual stress and fatigue strength of AISI 304 austenitic stainless steel have been evaluated at various shot peening conditions. The improvement in various mechanical properties such as hardness, damping factors and fatigue strength was noticed. Compressive residual stress induced by shot peening varies with cyclic loading due to relaxation of compressive residual stress field. The consideration of relaxed compressive residual stress field instead of original compressive residual stress field provides reliable fatigue design of components. In this paper, the exact reductions in weight and control of mechanical properties due to shot peening process are discussed.
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References
- Aaron, D., 1985, "Machine Design," 3rd Ed, Macmillan Publishing Co. USA, pp 750-757.
- Aggarwal, M.L, Khan, R.A. and Agrawal, V.P, 2005, "Influence of Shot Peening Intensity of Fatigue Design Reliability of 65Si7 Spring Steel," Indian Journal of Engg. & Materials Science, Vol. 12(6), pp 515-520.
- Aggarwal, M.L, Agrawal, V.P. and Khan, R.A., 2006, "A Stress Approach Model for Predicting Fatigue Life of EN45A Spring Steel," Int. J. Fatigue, Elsevier Publication, Vol. 28(12), pp. 1845-53.
- Aggarwal, M.L., 2008, "Shot Peened High Nitrogen Austenitic Stainless Steel: An Alternate to Ni Rich Austenitic Stainless Steel for Medical Applications," Int. J. of Materials and Product Technology, (Accepted).
- Devdutt and Aggarwal M.L., 2006, "Trends and Advances in Austenitic Stainless Steel," National Conf. on Trends and Advances in Mech. Engg., YMCAIE Faridabad, India, p. 470.
- Gao, Y.K., Yin, Y.F. and Yao, M., 2003, "Effects of Shot Peening on Fatigue Properties of 0Cr13Ni8Mo2Al Steel," Materials Science and Technology. Vol.19(3), pp. 372-374.
- GAO Yukui., 2004, "Microstructure Changes and Residual Stresses of each Phase caused by Shot Peening in 304 Austenitic Stainless Steel," Journal of Aeronautical Materials. Vol. 24(4), pp. 18-21.
- Meriam, J.L. and Kraige, L.G., 2002, "Engineering Mechanics," Vol. 2, 5th Ed. (John Wiley & Sons, Inc., Singapore), pp. 593-600.
- Mitsubayashi, M., Miyata T. and Aihara, H., 1995, "Prediction of Improvement in Fatigue Strength by Shot Peening and Selection of Most Effective Peening Condition," Trans. Jpn Soc. Mech. Eng. Ser A, Vol. 61, pp. 1172-1178.
- Pandey, R.K. and Deshmukh, M.N., 2001, "Shot Peening and its Effect on Fatigue Life of Engineering Components," Int. Conf. on Shot Peening and Shot Blasting, pp. 1-20.
- SAE Annual Book of ASTM Standards Part - 10, 1977, pp. 536-554.
- Schijve, J., 2003, "Fatigue of Structures and Materials in the 20th Century and the State of the Art," Int. J. of Fatigue, Vol. 25(8), pp. 679-700.
- Shaw, B.A., Aylott, C., Hara, P.O. and Brimble, K., 2003, "The Role of Residual Stress on the Fatigue Strength of High Performance Gearing," Int. J. of Fatigue, Vol. 25, pp. 1279-1283.
- Sharma, M.C., 2001, "Shot Peening and Blasting," Int. Conf. on Shot Peening and Sand Blasting, pp. 190-195.
References
Aaron, D., 1985, "Machine Design," 3rd Ed, Macmillan Publishing Co. USA, pp 750-757.
Aggarwal, M.L, Khan, R.A. and Agrawal, V.P, 2005, "Influence of Shot Peening Intensity of Fatigue Design Reliability of 65Si7 Spring Steel," Indian Journal of Engg. & Materials Science, Vol. 12(6), pp 515-520.
Aggarwal, M.L, Agrawal, V.P. and Khan, R.A., 2006, "A Stress Approach Model for Predicting Fatigue Life of EN45A Spring Steel," Int. J. Fatigue, Elsevier Publication, Vol. 28(12), pp. 1845-53.
Aggarwal, M.L., 2008, "Shot Peened High Nitrogen Austenitic Stainless Steel: An Alternate to Ni Rich Austenitic Stainless Steel for Medical Applications," Int. J. of Materials and Product Technology, (Accepted).
Devdutt and Aggarwal M.L., 2006, "Trends and Advances in Austenitic Stainless Steel," National Conf. on Trends and Advances in Mech. Engg., YMCAIE Faridabad, India, p. 470.
Gao, Y.K., Yin, Y.F. and Yao, M., 2003, "Effects of Shot Peening on Fatigue Properties of 0Cr13Ni8Mo2Al Steel," Materials Science and Technology. Vol.19(3), pp. 372-374.
GAO Yukui., 2004, "Microstructure Changes and Residual Stresses of each Phase caused by Shot Peening in 304 Austenitic Stainless Steel," Journal of Aeronautical Materials. Vol. 24(4), pp. 18-21.
Meriam, J.L. and Kraige, L.G., 2002, "Engineering Mechanics," Vol. 2, 5th Ed. (John Wiley & Sons, Inc., Singapore), pp. 593-600.
Mitsubayashi, M., Miyata T. and Aihara, H., 1995, "Prediction of Improvement in Fatigue Strength by Shot Peening and Selection of Most Effective Peening Condition," Trans. Jpn Soc. Mech. Eng. Ser A, Vol. 61, pp. 1172-1178.
Pandey, R.K. and Deshmukh, M.N., 2001, "Shot Peening and its Effect on Fatigue Life of Engineering Components," Int. Conf. on Shot Peening and Shot Blasting, pp. 1-20.
SAE Annual Book of ASTM Standards Part - 10, 1977, pp. 536-554.
Schijve, J., 2003, "Fatigue of Structures and Materials in the 20th Century and the State of the Art," Int. J. of Fatigue, Vol. 25(8), pp. 679-700.
Shaw, B.A., Aylott, C., Hara, P.O. and Brimble, K., 2003, "The Role of Residual Stress on the Fatigue Strength of High Performance Gearing," Int. J. of Fatigue, Vol. 25, pp. 1279-1283.
Sharma, M.C., 2001, "Shot Peening and Blasting," Int. Conf. on Shot Peening and Sand Blasting, pp. 190-195.