Title: Experimental study of the shot peening treatment effect on austenitic stainless steel

Authors: Mohammed Chaib; Abdelkader Megueni; Abdelkader Ziadi; Mario Guagliano; Francisco Javier Varela Belzunce

Addresses: Laboratory of Structures and Solids Mechanics (LMSS), Faculty of Technology, University Djilali Liabes of Sidi Bel Abbès (22000), Algeria ' Laboratory of Structures and Solids Mechanics (LMSS), Faculty of Technology, University Djilali Liabes of Sidi Bel Abbès (22000), Algeria ' Laboratoire des structures intelligentes, Ctr univ. Ain Temouchent, Algeria ' Department of Mechanical Engineering, Politecnico di Milano, Via La Masa, 1, 20156 Milano, Italy ' Material Science Department, University of Oviedo, Campus Universitario, 33203, Gijón, Spain

Abstract: Surface treatments are increasingly used to enhance fatigue resistance of metal parts by improving the properties of the surface layer of materials. The aim of this study is to highlight the effect of shot peening on the surface state of an austenitic stainless steel, both in terms of surface work hardening and as regards the residual stress field. An extensive experimental work by means of X-ray diffraction, micro hardness and microscopy observation allowed to assess that shot peening is also able to generate a nanostructured layer of material. An analytical equation was defined to relate the treatment parameters and its main effect based on the experimental results with the aim to provide a useful tool for a correct design of the shot peening treatment.

Keywords: surface treatment; shot peening; austenitic stainless steel; hardening; residual stress; microhardness; fatigue resistance; nanostructured layers; nanotechnology.

DOI: 10.1504/IJMPT.2016.079197

International Journal of Materials and Product Technology, 2016 Vol.53 No.3/4, pp.298 - 314

Received: 04 Feb 2016
Accepted: 11 Mar 2016
Published online: 22 Sep 2016 *

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