Comparison between residual stress induced by waterjet peening and shot peening

Mahmoudi, A. H.; Salahi, F.; Ghasemi, A.

Abstract

Surface modification techniques have received much attention among the researchers around the world. Yet, finding the best way to enhance the surface properties remains one of the challenges in engineering. Most of the fatigue cracks begins from the surface of the engineering components. A well-known technique to delay the crack initiation or slow its propagation rate is to induce compressive residual stresses on the surface of the components. Peening processes have been developed to create surface compressive residual stresses. There are various kinds of peening methods available in different industries. Shot peening and water jet peening are more popular in comparison with other methods. In shot peening, the surface is peppered with shots whereas in water jet peening high energy water jet impacts the surface. Both techniques create a local plastic region. The plastic region in turn creates a compressive region beneath the surface. In the current study, the residual stresses induced by both peening techniques are compared. Furthermore, the surface roughness of both methods are studied.

• Presentation Conference Type: Conference Paper (unpublished)
• Conference Name: The 30th X International Conference on Surface Modification Technologies (SMT30)
• Start Date: Jun 29, 2016
• End Date: Jul 1, 2016
• Deposit Date: Sep 15, 2024
• Peer Reviewed: Peer Reviewed
• Public URL: https://uwe-repository.worktribe.com/output/12889310