Journal
CORROSION SCIENCE
Volume 128, Issue -, Pages 120-129Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2017.09.001
Keywords
Stress corrosion cracking; Multiple cracking; Crack interactions; Digital image correlation; Electrochemical noise; Acoustic emission
Funding
- National French Research Agency (ANR) [MATETPRO ANR-12-RMNP-0020]
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Digital Image Correlation (DIC), Acoustic Emission and Electrochemical Noise measurements were applied to study the growth of multiple intergranular cracks as a colony on an Alloy 600 in a tetrathionate solution. Cracks exceeding 55 mu m in length and 0.45 mu m in opening were successfully detected by DIC. Moreover, crack population was classified into initiating, active and dormant cracks, active population being the larger one. The emergence and intensification of interactions produced a modification on the colony growth behavior. They range from a mostly surface crack propagation (in the absence of interactions), to in depth propagation predominantly governed by crack shielding.
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