14th International Conference on Shot Peening

The effect of temperature and Almen intensity on surface integrity of AA2024-T351 strips during shot peening

A. Sadallaha, B. Changeux, J. badreddine, H. Y. Miao, S. Turenne, M. Lévesque, E. Martin

Département de Génie Mécanique, École Polytechnique de Montréal, C.P. 6079, Succ. Centre-ville, Montréal, Québec, H3C 3A7 Canada

Aluminum Research Center, REGAL, Université Laval, 1065, avenue de la Médecine, Québec, G1V 0A6 Canada

Safran Tech, Materials & Processes department, Rue des Jeunes Bois, 78772 Magny-Les-Hameaux, France

Introduction

Shot peening is one of the competitive mechanical treatment used to modify surface mechanical properties of automotive and aircraft components by inducing compressive residual stresses [1]. Warm shot peening consists of impacting metals with high velocity shots at a specific temperature. In this study, shot peening at room temperature and at elevated temperatures in the range of 150⁰C to 300⁰C was conducted, using low, medium, and high Almen intensities to highlight the influence of the process on the arc height, the surface roughness, the hardness, and microstructure changes of AA2024-T351 specimens.

Objectives

Study the influence of temperature and Almen intensity on the surface roughness, hardness and microstructural changes of AA2024-T351 during shot peening. Moreover, obtain the potential dynamic strain aging (DSA) temperature by analysing the hardness, and microstructure changes.