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金属学报 1998
FRACTOGRAPHIC STUDY OF SCC OF 321 AUSTENITIC STAINLESS STEEL SINGLE CRYSTAL
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Abstract:
The observation of behavior of SCC of 321 austenitic stainless steel single crystal in boiling 42%MgCl2 showed that there was a relationship between the appearence of slip bands and the initiation or propagation of SCC. Although the stress corrosion cracks often nucleated at the intersection of two slip bands, they propagated along neither of these two slip bands. The SEM observations of the fractography of SCC showed that although the stress corrosion crack with river- markings or fan-patterns nucleated normally along the average macroscopic plane {100}, the detailed observations indicated that the microshear facets were along {111} plane.