|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Fundamental Mechanisms of Preventing Stress Corrosion Cracking of Austenitic Alloys by Laser Shock Peening
||Bai Cui, Xueliang Yan, Fei Wang, Chenfei Zhang, Yongfeng Lu, Michael Nastasi
|On-Site Speaker (Planned)
Stress corrosion cracking (SCC) is a significant problem for austenitic alloys in hot water corrosive environments, which limits their lifetime in petroleum, chemical, and nuclear industries. Laser shock peening (LSP) is a new approach that can effectively prevent SCC of austenitic alloys, but the fundamental mechanisms remain poorly understood. This study applies LSP to commercial 304 steels and oxide-dispersion-strengthened (ODS) 304 steels. In this process, laser-driven shock waves are generated which can penetrate to a depth of more than 1 mm from the surface, inducing significant compressive residual stresses. The shock waves can also result in microstructures of plastic deformation such as a high density of dislocations, stacking faults, and deformation twins in the affected region. This research will use experimental approaches to determine the processing-microstructure-property relationship of austenitic alloys in the LSP process, and understand the mechanisms that enable LSP to mitigate SCC of austenitic alloys.
||Planned: Supplemental Proceedings volume