Abstract

Consideration is given to the initiation of stress corrosion cracks at metal surfaces where structural features, such as grain boundaries or slip steps, emerge, as well as to initiation from pits, crevices or other geometrical discontinuities, in the context of a variety of metal-environment systems. The importance of localized environment composition and potential changes within discontinuities for some systems is discussed, as is the stress concentration associated with pits. Brief consideration is given to the phenomena of non-propagating cracks and crack coalescence, as matters having a significant influence on whether or not initiation proceeds to propagation.

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