Table of Contents
ISRN Mechanical Engineering
Volume 2011, Article ID 867484, 7 pages
Research Article

Relationship between Damping Factor and Compressive Residual Stress for Shot-Peened Austenitic Stainless Steel

1Department of Mechanical Engineering, YMCA University of Science & Tech., Faridabad 121006, India
2Department of Mechanical Engineering, Jamia Millia Islamia, New Delhi 110025, India

Received 29 January 2011; Accepted 8 March 2011

Academic Editors: J.-L. Marcelin and A. Tounsi

Copyright © 2011 Lakhwinder Singh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The mechanical properties of austenitic stainless steel are rarely improved by heat treatment. Shot peening is a well-known cold working process that affects thin surface of materials. By controlling the shot peening intensity and shot size, the variable mechanical properties film thickness was obtained from 0.05 mm to 0.5 mm. The damping factor and compressive residual stress are determined experimentally and forming a relation between them. It was found that damping factor in thin film surface increases with depth of deformed layer. An investigation was carried out, and it was found that the increase in damping factor was due to introduction of compressive residual stress and increased hardness due to shot peening. The paper discusses a model of changing damping properties with compressive residual stress and depth of deformed layer of austenitic stainless steel.