Prediction of the quality of resistance welds by computer based color image analysis [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 15 pages : digital, PDF file
Additional Creators:: Westinghouse Savannah River Company, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

This report discusses experiments which have been completed to correlate the quality of electric resistance pinch welds with an automated computer analysis of the weld surface. The pinch welds were performed on small diameter stainless steel tubes after they were annealed in air at several different temperatures to form an oxide layer on the weld surfaces. The images of the tube bore were collected with a borescope, stored in a computer and analyzed. The analysis consisted of computing a parameter which gave a representation of the color integrated over the inspected region. This color parameter was then used to rank the tubes in order of their relative oxidation level. Once this was performed the tubes were welded and low magnification metallography was performed on the welds. It was found that the color analysis gave a perfect correlation with the oxidation levels and that the weld quality was inversely proportional to the amount of oxidation. It was also shown that the color analysis was robust in the sense that the sorting was independent of the borescope illumination level over a large range for both oxidized and unoxidized stems. Thus the color parameter chosen was an excellent predictor of the weld quality.

Report Numbers:

E 1.99:wsrc-ms--92-051
E 1.99: conf-9208178--1
conf-9208178--1
wsrc-ms--92-051

Subject(s):

Other Instrumentation

Other Subject(s):

Note:

Published through SciTech Connect.
11/01/1992.
"wsrc-ms--92-051"
" conf-9208178--1"
"DE93002402"
International Metallographic Society annual meeting,Denver, CO (United States),2-5 Aug 1992.
Pechersky, M.J.; Kestin, P.A.; Zeoli, K.A.

Funding Information:

AC09-89SR18035

View MARC record | catkey: 14674587