Chemistry: electrical and wave energy – Processes and products
Patent
1978-08-21
1980-02-26
Tung, T.
Chemistry: electrical and wave energy
Processes and products
204195R, 204195F, G01N 2746
Patent
active
041905016
ABSTRACT:
An apparatus and procedure for measuring internal metal stress and determining the effectiveness of metal stress-relief treatments. More specifically, an apparatus and procedure for determining the effectiveness of metal stress-relief by heat treatment in the heat-affected zone surrounding a metal weld. The apparatus comprises an electrical half-cell and a unique bridge system designed to provide intimate physical contact between the electrical half-cell and a metal surface. The apparatus permits a metal to half-cell electrical potential measurement to be made at various locations upon the metal surface. The electrical potential measurements provide a means of evaluating the efficiency of a stress-relief treatment in reducing internal stress within a metal.
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Addison William G.
Transworld Drilling Company
Tung T.
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