Environment Sensitive Fracture

Abstract

The sections in this article are Introduction Phenomenology of Environmentally Assisted Cracking ( EAC ) Examples of EAC Phenomenology of Stress Corrosion Cracking ( SCC ) Material/Environment Systems Crack Morphology Mechanical Stress Initiation Versus Propagation Crack Propagation Temperature Material Composition and Structure Phenomenology of Corrosion Fatigue Crack Initiation Crack Propagation Role of Surface Films in Environmentally Assisted Cracking The Effect of Surface Films on the Fatigue behavior in Air The Effect of Protective Surface Films in Stress Corrosion Cracking Dealloyed Surface Films Crack Tip Environments Corrosion of Crack Faces Modeling the Crack Tip Environment An Example of Corrosion Fatigue Review of Localized Corrosion–Deformation Interactions Influence of Dissolution on the Mechanical Behavior Influence of Plasticity on Dissolution Processes An Example of Mechanical and Electrochemical Coupling Effects Cyclic Deformation Mechanisms in Air Influence of 3.5% Na Cl Solution Hydrogen‐Dislocation Interactions Introduction Stress‐Assisted Diffusion of Hydrogen Hydrogen Interaction with One Edge Dislocation Steady State Repartition of Hydrogen Temperature Dependence Stress Induced in the Slip Plane by Hydrogen Hydrogen Interaction with Two Edge Dislocations Hydrogen Effect on the Cross Slip Ability Environmentally Assisted Cracking ( EAC ) Models Film Rupture/Slip Dissolution Model Film Rupture/Slip Dissolution Mechanism Applying the Model to Practical Problems Limitations of the Film Rupture–Slip Dissolution Model Film Induced Cleavage Model Corrosion Assisted Cleavage Model Hydrogen Assisted Cracking Models Decohesion Models Hydrogen Induced Plasticity Models Corrosion Enhanced Plasticity Model Modeling Numerical Simulation of the Mobile Obstacle Conclusions

Mechanistic and fractographic aspects of stress-corrosion cracking (SCC)

“…The corrosion-enhanced localised-plasticity (CELP) mechanism of transgranular SCC in fcc materials, involving dissolution, adsorbed hydrogen and absorbed hydrogen, was proposed by Magnin and co-workers in the 1980s [9,104,105]. SCC was thought to occur by the following sequence of events: 3.…”