|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||NOW ON-DEMAND ONLY – Mechanisms of Mitigating Chloride-induced Stress Corrosion Cracking of Austenitic Steels by Laser Shock Peening
||Yongchul Yoo, Xueliang Yan, Fei Wang, Qiuchi Zhu, Yongfeng Lu, Bai Cui
|On-Site Speaker (Planned)
This manuscript investigates the effect of laser shock peening (LSP) on the chloride-induced stress corrosion cracking (SCC) of 304 austenitic steels. LSP can induce a high compressive residual stress and plastic deformation. Constant-load SCC tests in a 42% MgCl2 solution suggested that LSP can retard the crack initiation and slow the crack growth. LSP-treated subsurface layers experience ductile fracture while the central regions exhibit intergranular SCC. The LSP-induced deformation structures may reduce slip-dissolution by impeding dislocation slips, while the LSP-induced compressive residual stress can lessen the stress intensity factor of crack tips and decrease the local stress for film rupture.