Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1984-12-11
1986-09-09
Levy, Stewart J.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73104, 73799, G01N 1908
Patent
active
046101578
ABSTRACT:
A test specimen has a carefully controlled series of cracks on its surface and is useful for evaluating surface penetrants employed in non-destructive inspection. A flat brass substrate has a nickel electroplating on one surface, which plating varies in thickness along the length of the panel. The opposing side of the panel has a multiplicity of grooves which locally concentrate strain in the plating when the panel is bent during manufacture, thus providing a crack associated with each groove. In a preferred embodiment, the texture of the cracked surface varies across the panel in the same direction in which the cracks run, thus enabling evaluation of the usefulness of penetrants in finding different size cracks under different surface finish conditions.
REFERENCES:
patent: 3164006 (1965-01-01), Alburger
patent: 3927551 (1975-12-01), Alburger
patent: 3946597 (1976-03-01), Tahbaz
patent: 4078417 (1978-03-01), Shigekawa
1965 (Proposed) U.S. Military Specification Mil-I-8963 (ASG) Inspection Materials, Fluorescent Penetrant pp. 1-3, 18-24.
Shimizu Setsuo
Vicki Frank J.
Levy Stewart J.
Nessler C. G.
Roskos Joseph W.
United Technologies Corporation
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