Method of simulating spherical voids for use as a radiographic s

Details Method of simulating spherical voids for use as a radiographic s Method of simulating spherical voids for use as a radiographic s

1976-02-17

1977-06-07

Willis, Davis L.

Radiant energy

Calibration or standardization methods

G01D 1800

Patent

active

040285456

ABSTRACT:
A method of simulating small spherical voids in metal is provided. The method entails drilling or etching a hemispherical depression of the desired diameter in each of two sections of metal, the sections being flat plates or different diameter cylinders. A carbon bead is placed in one of the hemispherical voids and is used as a guide to align the second hemispherical void with that in the other plate. The plates are then bonded together with epoxy, tape or similar material and the two aligned hemispheres form a sphere within the material; thus a void of a known size has been created. This type of void can be used to simulate a pore in the development of radiographic techniques of actual voids (porosity) in welds and serve as a radiographic standard.

REFERENCES:
patent: 3183354 (1965-05-01), Amrehn
patent: 3911271 (1975-10-01), Mitchell

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