Crystal plasticity simulation on intergranular stress corrosion cracking of bulked nanostructured metal

Aoyagi, Yoshiteru; Kaji, Yoshiyuki

no journal, , 

Stress corrosion cracking (SCC) is one of the critical concerns as degradation of structural components in light water reactors for long period. It takes the form of intergranular stress corrosion cracking (IGSCC). Many studies on IGSCC have been conducted over several decades, however the mechanism of IGSCC initiation and propagation is not fully understood. In this study, a crystal plasticity model expressing IGSCC is proposed by considering information of oxidation along grain boundaries and failure of oxide film due to localization of deformation. From a crystal plasticity finite element analysis and an oxygen reaction-diffusion finite difference analysis based on the presented model, IGSCC is numerically reproduced and we discuss about the effect of grain size on the crack propagation behavior.