Crack propagation test specimen

Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Corrosion tester

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73 5301, 73104, 73785, 73799, 436 6, G01N 1700, G01N 1704

Patent

active

052924815

ABSTRACT:
A crack propagation test specimen has a base metal and a clad metal. The base metal has an upper surface and a bottom surface with a hole extending from the bottom surface toward the upper surface. The cladding metal is supported on the upper surface of the base metal and has a first slot cut therethrough which is in fluid flow communication with the hole in the base metal. A second slot is cut in the cladding metal adjacent to the first slot for receiving a wedge. The first slot and the second slot define a wall which closes over the first slot when a wedge is forced into the second slot to simulate a hairline crack. A mechanically deformed metal sample is disposed in the hole in the base metal to simulate a stressed base metal supporting a cladding metal subject to hairline cracking.

REFERENCES:
patent: 3116117 (1963-12-01), Marsh et al.
patent: 4267148 (1981-05-01), Dickson et al.
patent: 5147802 (1992-09-01), Aspden et al.
H. R. Copson et al. Corrosion 1960, 16, 123-129.
H. L. Craig et al. Ing "Handbook on Corrosion Testing and Evaluation".
W. H. Ailor, Ed., John Wiley and Sons, Inc., New York, 1971, 231-271.
"Corrosion Basics An Introduction Duction" National Association of Corrosion Engineers, Houston, Tex., 1984, 309-317.

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