Electromagnetic Detection of Stress Gradients at the Surfaces of Metals

A general, integral expression is developed which relates measurements of the variations of the imaginary component of complex- reluctance with frequency to stress profiles near the surfaces of metals. The technique should yield either applied or residual stress profiles produced, for example, by he...

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Bibliographic Details
Published inAIP conference proceedings Vol. 700; no. 1
Main Authors Schmidt, William F., Zinke, Otto H.
Format Journal Article
LanguageEnglish
Published United States 26.02.2004
Subjects
BENDING
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTROMAGNETIC RADIATION
FATIGUE
IRON
RESIDUAL STRESSES
SHOT PEENING
STEELS
STRESS ANALYSIS
SURFACES
TESTING
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Summary:A general, integral expression is developed which relates measurements of the variations of the imaginary component of complex- reluctance with frequency to stress profiles near the surfaces of metals. The technique should yield either applied or residual stress profiles produced, for example, by heat-treating, metal-working, fatigue, or peening. It may even be applicable to carburizing. The technique of measurement cancels out the effects of any pre-treatment residual-stress profile (subject to the assumption of superposition). The general, integral expression is induced from the results of measurements on a steel bar which is subjected to both tensile tests and bending tests.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.1711767