Jivkov's articles
Modelling intergranular stress corrosion cracking in simulated three-dimensional microstructures
Abstract
Microstructure can have a significant effect on the resistance to intergranular stress corrosion cracking. Certain grain boundaries are susceptible
to corrosion while others have high resistance and may form crack bridging ligaments as the crack deviates around them. To investigate the mechanics
of crack bridging, 3D computational model has been previously developed. An extension to the model, to include stress corrosion crack growth kinetics
is presented in this paper. An analysis of the effects of resistant grain boundary fraction demonstrates that the bridging ligaments can significantly
retard short crack propagation rates. Increasing the fraction of resistant boundaries is shown to improve microstructure resistance by reducing the
crack propagation rate.