Current Topics in Corrosion:Factors Influencing Stress Corrosion Crack Growth Kinetics
- 1 March 1987
- journal article
- Published by Association for Materials Protection and Performance (AMPP) in Corrosion
- Vol. 43 (3) , 130-139
- https://doi.org/10.5006/1.3583125
Abstract
One of the problems in relation to predicting the rates of defect growth in structures displaying stress corrosion cracking (SCC) is that knowledge relating to realistic stress corrosion crack velocities is very limited. In monotonic slow strain rate tests (SSRTs) taken to total failure at usual strain rates and in tests on precracked specimens at stress intensity factors in excess of KISCC, stress corrosion crack velocities may be appreciably higher than are likely to occur in service, except in the very late stages of crack growth before a service failure. These differences probably develop partly because of differences in the effective crack tip strain rate, and consideration is given to various expressions for calculating the latter from the applied strain rate. For multiple cracked specimens, as in SSRTs, the importance of considering the number of cracks is demonstrated, in which case it is possible to calculate (involving electrochemical data) the crack velocity-strain rate relationships i...Keywords
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