The effect of high temperature shot peening on the surface integrity of 2024-T351 aluminum alloy.

Author:  A. Sadallah1, J. Badreddine2, B. Changeux2, S. Turenne1, H. Y. Miao1, M. Lévesque1, and E. Martin1 1 Département de Génie Mécanique, École Polytechnique de Montréal, C.P. 6079, Succ. Centre-ville, Montréal, Québec, H3C 3A7, Canada. 2 Safran Tech, Material
Source:  ICSP14 Milan
Doc ID:  2022096
Year of Publication:  2022
ABSTRACT Shot peening is considered to be an important surface modification procedure for structural materials to improve their fatigue properties. The surface properties can be further improved by changing the temperature of the surface during the process of peening. In this study, shot peening at room temperature and at high temperatures ranging from 100°C to 250°C was conducted using an Almen intensity of 0.12 mmA to study the influence of the process on the arc height, the surface roughness, and the work hardening of AA2024- T351 specimens. Arc height measurements, 2D roughness measurements, and Rockwell B hardness tests were performed on each shot peening condition. The results show that the high temperature shot peening process at 200°C had an effect on increasing the arc heights of specimens when compared to specimens peened at the other high temperatures, the surface roughness increased with the increase of the peening temperature, and the highest value of surface hardness was seen at a temperature of 250°C. Keywords High temperature shot peening, Almen intensity, 2024-T351 aluminum alloy, Surface roughness, Surface hardness, Arc height.

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