What can micromechanics tell us about the surface integrity of shot-peened materials?

Robles-Linares, Jose A.; Luna, Gonzalo García; la Monaca, Andrea; Liao, Zhirong; Hardy, Mark C.

Abstract

Standard techniques for assessing shot peening include XRD and EBSD for measuring residual stresses and severe deformation beneath the surface; however, these techniques do not consider the localised micromechanical behaviour. Here, single-grain micropillar compression tests in a Ni-base superalloy reveal that the micromechanical effect of shot peening could be insignificant due to the machining-induced pre-strained condition of the surface. Further, it is shown that shot-peening-induced strengthened layer can extend much less (∼50%) than the depth at which compressive stresses are still present. This work highlights the need for employing micromechanics as a complementary shot peening assessment technique for machined components.

Citation

Robles-Linares, J. A., Luna, G. G., la Monaca, A., Liao, Z., & Hardy, M. C. (2023). What can micromechanics tell us about the surface integrity of shot-peened materials?. CIRP Annals - Manufacturing Technology, 72(1), 497-500. https://doi.org/10.1016/j.cirp.2023.04.003

• Journal Article Type: Article
• Acceptance Date: Apr 27, 2023
• Online Publication Date: Apr 27, 2023
• Publication Date: 2023
• Deposit Date: May 9, 2023
• Publicly Available Date: May 10, 2023
• Journal: CIRP Annals
• Print ISSN: 0007-8506
• Electronic ISSN: 1726-0604
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 72
• Issue: 1
• Pages: 497-500
• DOI: https://doi.org/10.1016/j.cirp.2023.04.003
• Keywords: Surface integrity; Nickel alloy; Micromechanics
• Public URL: https://nottingham-repository.worktribe.com/output/20008797
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0007850623000495