A Geometry-Based Method for Prediction of Shot-Peening Coverage


Article Preview

Shot-peening is the process of repeatedly hitting the work piece surface with small balls, making overlapping indentations on the surface. This process is extensively used on shafts, gears, springs, and jet engine parts because it imparts compressive residual stresses on the surface, thus improving the fatigue life of components. Under-peening does not give a sufficient fatigue life while over-peening induces cracking and reduces fatigue performance. Hence, determining optimal peening conditions such as peening time is very important. In general, optimal peening conditions are experimentally determined by measuring arc-height using Almen-strip or calculating coverage using microscope images. Shot-peening coverage is defined as the proportion of the exposed surface that has been impacted in a given time of shot-peening. To save the time and effort spent in repeating experimental measurement needed whenever the geometry of a work piece and peening conditions change, this paper presents a computer simulation algorithm for the prediction of shot-peening coverage, which is based on the geometry of a work piece. An example is presented to validate the proposed method.



Edited by:

W.B. Lee, C.F. Cheung and S. To




H. S. Kim et al., "A Geometry-Based Method for Prediction of Shot-Peening Coverage", Key Engineering Materials, Vol. 516, pp. 527-532, 2012

Online since:

June 2012




[1] A. Wick, V. Schulze, O. Vöhringer, Effects of warm peening on fatigue life and relaxation behavior of residual stresses in AISI 4140 steel, Mater. Sci. Eng. A 293 (2000) 191-197.

DOI: 10.1016/s0921-5093(00)01035-2

[2] S.A. Martinez, S. Sathish, M.P. Blodgett, S. Mall, S. Namjoshi, Effects of fretting fatigue on the residual stress of shotpeened Ti–6Al–4V samples, Mater. Sci. Eng. A 399 (2005) 58-63.

DOI: 10.1016/j.msea.2005.02.028

[3] H.T. Kim, K.H. Shin, Relationship between feed rate and fatigue life of Al7075-T6 specimens before and after shotpeening, Mater. Sci. Forum 580-582 (2008) 109-112.

DOI: 10.4028/www.scientific.net/msf.580-582.109

[4] S. Di, X. Yang, D. Fang, G. Luan, The influence of zigzag-curve defect on the fatigue properties of friction stir welds in 7075-T6 Al alloy, Mater. Chem. Phys. 104 (2007) 244-248.

DOI: 10.1016/j.matchemphys.2007.01.023

[5] A. Cerrini, S. Beretta, Failure investigation and design improvements of Al 7075 piston for hydraulic actuators, Eng. Fail. Anal. 13 (2006) 18-31.

DOI: 10.1016/j.engfailanal.2004.12.026

[6] M. Guagliano, Relating Almen intensity to residual stresses induced by shot peening: a numerical approach, J. Mater. Process. Technol. 110 (2001) 277-286.

DOI: 10.1016/s0924-0136(00)00893-1

[7] H. Chardin, F. N'Guyen, F. Grillon, M. Jeandin, Random approach to peening coverage in ultrasonic shot-peening, Mater. Manuf. Processes 10 (1995) 1101-1106.

DOI: 10.1080/10426919508935092

[8] Y. Tirupataiah, B. Venkataraman, G. Sundararajan, The nature of the elastic rebound of a hard ball impacting on ductile, metallic target materials, Mater. Sci. Eng. A 124 (1990) 133-140.

DOI: 10.1016/0921-5093(90)90143-q

Fetching data from Crossref.
This may take some time to load.