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Effect of Plastic Deformation on Microstructure and Properties of 347 Austenite Steel
Kejian Li1, Dengming Chen1, Pengjun Cao1
1School of Metallurgy and Materials Engineering, Chongqing University of Science & Technology, Chongqing 401331, China.
Abstract:
A popular issue of recent scientific research is the surface modification induced by plastic deformation, such as ultrasonic shot peening (USP) on workpiece surface. USP is an efficient way to improve the mechanical behavior of specimens by inducing severe plastic deformation on their surface. Nevertheless, this surface treatment induced complex microstructural evolutions, such as grain refinement and phase transformation. In this work, the microstructure and properties of 347 austenite steel samples before and after USP for 5, 10, and 15 min treatments have been investigated. The affected layers show a significant hardness increase (~450 μm in depth) on the USP treated surface, and the 10 min USP treated specimen shows the best corrosion resistance in all tested specimens. The magnetic properties and microstructures of the tested specimens show gradient evolution during deformation.
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