Abstract
Blisters and their surrounding crack-tip areas in AISI 304 stainless steel have been imaged by Scanning Photo-Electrochemical Microscopy (SPEM), a technique providing photo-electrochemical images of hydrogen trapping and detrapping into blisters in real time, in situ and in continuous under hydrogen charging. The increased hydrogen concentration has also been imaged in the plastic enclave at the crack tip around a blister during its growth. The images acquired in time sequence can be examined as a single frame or assembled in a 2D or 3D movie, both in grey scale or false colour.
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