| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Advances in Surface Engineering
|
| Presentation Title |
Effect of Laser Shock Peening on Residual Stress Distribution of 304 Austenitic Steel |
| Author(s) |
Danbi Song, Ryoonhan Kim, Jeong Suh, Dongsig Shin |
| On-Site Speaker (Planned) |
Danbi Song |
| Abstract Scope |
Laser Shock Peening (LSP) is powerful surface technologies that has been widely used in Aerospace, nuclear power plant and marine industry. It is a process that propagates a shock wave into the material through plasma formed by irradiating a high energy laser pulse to the surface of a material. This causes a high residual compressive stress on the metal surface, which is beneficial to mechanical properties such as fatigue strength and stress corrosion.
In this study, the residual stress measurements in 304 austenitic stainless steel determined from Electron Backscatter Diffraction (EBSD) kernel average misorientation (KAM) analysis have been compared to residual stress results obtained by the hole drilling technique. High power laser was used to strengthen the surface of specimens with a single LSP. It was found that the grain size of the peened specimen was refined and the residual stress was increased. |