NDE method for stress corrosion cracking
NDE method for stress corrosion cracking
bhart192;
Proper cleaing is necessary for surface nondestructive testing. I would recommend wet fluorescent magnetic particle testing (WFMT). This nondestructive examination method is one of the most sensitive to surface inspection, and this is what you need for cracking which typically initiates along an exposed surface.
Proper cleaing is necessary for surface nondestructive testing. I would recommend wet fluorescent magnetic particle testing (WFMT). This nondestructive examination method is one of the most sensitive to surface inspection, and this is what you need for cracking which typically initiates along an exposed surface.





RE: NDE method for stress corrosion cracking
SCC often consists of numerous small tight cracks along the grain boundaries that require extended dwell time and development time to be visible when examined under ultraviolet light.
Wet fluorescent magnetic particle testing is fine for fatigue cracks, but typically isn't sensitive enough for detecting SCC in the early stages of initiation.
Best regards - Al
RE: NDE method for stress corrosion cracking
For non-magnetic metals, use "Level III" [high sensitivity] Dye Penetrant -- my favorite is Ardrox P-133. For PT, surface cleaning is critical. I would use a "Hotsey" hydroblast; about 3-5000 psig, hot water, and a little soap [organic surfectant]. Vapor degreasing is best for anything you can fit into the degreaser enclosure.
RE: NDE method for stress corrosion cracking
RE: NDE method for stress corrosion cracking
Disagree with the above statement. SCC can begin as small pits, which can be seen via proper WFMT. SCC can begin as small branched cracks, which can also be seen by proper WFMT.