Abstract

Shot peening (SP) process is performed on AA2024-T3 alloy to improve its fatigue strength, flexural strength and surface hardness. Response surface method (RSM) is used for designing the experiments. Experiments are conducted and the regression equations are framed using the Design Expert software. RSM based second order regression equations are used as input to Particle swarm optimisation (PSO) algorithm. PSO algorithm is used to find the best combination of shot peening process parameters, namely, peening pressure and peening distance for maximizing the responses. Validation of the solutions obtained from PSO is done by performing shot peening process with nickel balls. The results of mechanical properties of AA2024-T3 are found close to the predicted values obtained from PSO algorithm.

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