Deformation Mode and Microstructure on Stress Corrosion Cracking Path and Kinetics in High Temperature Water Environments

摘要

Stress corrosion cracking susceptibility of austenitic alloys subjected to various kinds of prior deformation and weld-shrinkage was investigated by material and microstructural characterization, crack growth rate tests in high temperature water, and crack tip characterization. The active cracking paths and cracking kinetics as functions of types and ratios of grain boundaries, microstructural anisotropy, strength or hardness, local strain in terms of the distribution of misorientation are quantitatively studied.