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A stress corrosion cracking mechanism based on surface mobility

Authors
Journal
Corrosion Science
0010-938X
Publisher
Elsevier
Publication Date
Volume
27
Issue
1
Identifiers
DOI: 10.1016/0010-938x(87)90117-x

Abstract

Abstract A mechanism for stress corrosion cracking (SCC) is developed from simple metallurgical principles and assuming that high surface mobility is present in the process. An equation is found for crack velocity as a function of surface mobility and stress concentration at the tip of the crack. This mechanism is shown to predict SCC specificity, as well as the effect of temperature on SCC, and the enhancement of crack velocity by hydrogen. A correlation between SCC, liquid metal embrittlement and hydrogen embrittlement of non-hydride forming metals is established.

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