Optimization of micro welds in leaf springs used in automotive vehicles

Leaf springs withstand varying stresses and vibrations due to road conditions. Influence of high contact pressures and temperatures results in micro welds between two mating leaf surfaces. The work presented in this paper relates to improvement in fatigue and fretting fatigue performance of leaf springs used in automotive vehicles. The fatigue strength of 65Si7 spring steel has been evaluated experimentally as a function of shot peening parameters for application in automotive vehicles. Effects of shot peening and coating on fatigue life of leaf springs are discussed.