Title: When shot-peening does not enhance fatigue life of leaf springs

Authors: M.L. Aggarwal, R.A. Khan, R.K. Garg

Addresses: Department of Mechanical Engineering, YMCA Institute of Engineering, Faridabad, 121006, India. ' Department of Mechanical Engineering, Jamia Millia Islamia, New Delhi 110025, India. ' Department of Industrial Engineering, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar, Punjab, India

Abstract: Fatigue life of shot-peened components and assemblies is found to be lower than expected owing to various reasons. In this paper, the fatigue strength of EN45A spring steel shot-peened samples has been evaluated experimentally at various shot-peening conditions. A wide difference was noticed in the fatigue testing results of leaf springs and sample data. Various contributing causes were analysed and the extent in improvement of fatigue life of shot-peened leaf springs has been discussed. The paper discusses circumstances when the shot-peening does not improve fatigue and fretting fatigue resistance of mating components.

Keywords: fatigue life; shot peening; specimen; fretting fatigue; leaf springs; spring steel.

DOI: 10.1504/IJSURFSE.2008.020499

International Journal of Surface Science and Engineering, 2008 Vol.2 No.3/4, pp.281 - 293

Published online: 27 Sep 2008 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article