Mechanistic aspects of the intergranular stress corrosion cracking of ferritic steels
Conference
·
OSTI ID:99537
- Univ. of Newcastle upon Tyne (United Kingdom)
Evidence of intergranular attack in the absence of stress, together with dissolution kinetics, indicate that the intergranular stress corrosion cracking of ferritic steels in various environments is by a dissolution mechanism. Film rupture can play an important role in the rate of growth of cracks, but film rupture is not the mechanism of growth. The dual requirements of dissolution and filming, to sustain crack growth in the crack tip region, indicate the need for the system to display an active-passive transition in those regions of potential where cracking occurs, and such are observed. The localization of dissolution in grain boundary regions is due to the presence of segregates or precipitates, but there is need of appropriate measurements in this area if some the details of the mechanism of cracking are to be fully understood.
- OSTI ID:
- 99537
- Report Number(s):
- CONF-950304--
- Country of Publication:
- United States
- Language:
- English
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