Abstract
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.
Highlights
The method of heat treatment in stainless steel depends on the type of stainless steel and the reason for the treatment
The paper has accomplished the following for 304 austenitic stainless steel
(1) Shot peening increases the hardness of 304 austenitic stainless steel
Summary
The method of heat treatment in stainless steel depends on the type of stainless steel and the reason for the treatment Heat treatment processes such as annealing, hardening, stress relieving, and so forth restore desirable properties such as corrosion resistance, hardness, toughness, ductility, and damping. From the classification on the basis of the predominant phase constituent of the microstructure, the austenitic stainless steel is most corrosion resistant. This makes its wide application in chemical and food processing equipments, medical equipments, cryogenic vessels, and so forth. It is better to have hardenability, fatigue strength, damping, and tensile strength, along with the corrosion resistant in various applications
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