Numerical and Experimental Evaluation of Residual Stress and Fatigue Strength of Steel CK35 in Shot Peening Process

Document Type : Persian


1 Professor, Science and Research Branch, Islamic Azad University, Arak, Iran

2 Associate Professor, Malek Ashtar University of Technology, Tehran, Iran

3 MSc Student, Islamic Azad University, Science and Research Branch, Tehran, Iran


In shot peening process the work piece surface is struck by a large number of balls and compressive residual stress is generated on the surface. So, mechanical properties such as fatigue strength, stress corrosion resistance, smooth shape and ... will improve. In this paper, the balls with a speed of 100 to 200 m/s were struck on the steel samples and fatigue strength compared with specimens without shot peening. The results indicated a significant increase in fatigue strength. Also the balls deep changes on the samples were calculated using ANSYS software and the results were compared with the experimental results. Results showed that, if the ball speed is 100 m/s, it leads 25% increase in fatigue strength while the residual stress will increase to 250 MPa. Furthermore, if the ball speed is 200 m/s, fatigue strength and residual stress increase up to 40% and 300 MPa, respectively. It is also concluded that the stress in the balls is twice as the work piece surface residual stress.


[1] Metals Handbook, Shot Peening, Vol. 9, 1982.
[2] Eleiche A.M., Megahed M.M., Abd- Allah N.M., The Shot Peening Effect on the HFC Behavior of High Strength Martensitic Steels, journal of Material Processing Technology, vol. 113, 2002, pp. 604-608.
[3] Schwarzer J., Schulze V., Vohringer O., Finite Element Simulation of Shot Peening- A Method to Evaluate the Influence of Peening Parameters on Surface Characteristics, Proceedings from International Conference of Shot Peening, ICSP-8, Munich, Germany.
[4] Oguri K., Fatigue life enhancement of aluminum alloy for aircraft by Fine Particle Shot Peening (FPSP), Journal of Materials Processing Technology, vol. 211, 2011, pp. 1395-1399.
[5] Zhang P., Lindemann J., Influence of shot peening on high cycle fatigue properties of the high-strength wrought magnesium alloy AZ80, Scripta Materialia, vol. 52, 2005, pp. 485–490.
[6] Tekeli S., Enhancement of fatigue strength of SAE 9245 steel by shot peening, Materials Letters, vol. 57, 2002, pp.604-608.
[8] Miao H.Y., Larose S., Perron C., Lévesque M., On the potential applications of a 3D random finite element model for the simulation of shot peening, Advances in Engineering Software, vol. 40, 2009, pp. 1023-1038.
[9] Majzoobi G.H., Azizi R., three-D numerical method of shot peening process using multiple shot impacts, Proceeding ISCP-9, 2005, Paris, France.
[10] Zoin H. L., a dynamic finite element simulation of the shot-peening Process, Ph.D. thesis, Georgia Institute of technology, USA, 2003.
[11] Boyce B.L., Chen X., Hutchinson J.W., Ritchie R.O., the residual stress state due to a spherical hard-body impact., Mechanics of Materials, vol. 33, 2001, pp. 441-454.
[12] Guagliano M., Vergani L., Bandini M., Gili F., an approach to relate the shot peening parameters to the induced residual stresses, Proceeding ISCP-9, 1999, Warsaw, Pland.
[13] Guagliano M., Relating Almen intensity to residual stresses induced by shot peening: a numerical approach, Journal of Materials Processing Technology, vol. 110, 2001, pp. 277-286.
[14] Luo J., Harding R.A., Bowen P., evaluation of the fatigue behavior of ductile irons with various matrix microstructures, Metallurgical and materials transaction, vol. 33, 2002, pp. 3719-3730.  
[15] Dai P.Q., He R.Z., Wu W.Q. Mao Z.Y, Mechanical behavior of graphite in fracture of austempered ductile iron, Materials Science and technology, vol. 18, 2002, pp. 1052-1056.
[16] Hong T., Ooi J.Y., Shaw B., A numerical simulation to relate the shot peening parameters to the induced residual stresses, Engineering Failure Analysis, vol. 15, 2008, pp. 1097-1110