Method of simulating spherical voids for use as a radiographic standard

Patent · Sat Jan 01 00:00:00 EST 1977

OSTI ID:862849

Foster, Billy E ^[1]

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1. Oak Ridge, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 4028545
• OSTI ID: 862849
• Country of Publication: United States
• Language: English

Related Subjects

method
simulating
spherical
voids
radiographic
standard
metal
provided
entails
drilling
etching
hemispherical
depression
desired
diameter
sections
flat
plates
cylinders
carbon
bead
placed
guide
align
void
plate
bonded
epoxy
tape
similar
material
aligned
hemispheres
form
sphere
size
created
type
simulate
pore
techniques
porosity
welds
serve
method entails
similar material
flat plate
desired diameter
spherical voids
flat plates
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