Electromagnetic Detection of Stress Gradients at the Surfaces of Metals

Journal Article · Thu Feb 26 00:00:00 EST 2004 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1711767· OSTI ID:20632911

Schmidt, William F ^[1]; Zinke, Otto H ^[2]

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1. Mechanical Engineering Department, University of Arkansas, Fayetteville, AK, 72701 (United States)
2. International Validators, Inc., 817 North Jackson, Fayetteville, AK 72701 (United States)

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.

• OSTI ID: 20632911
• Journal Information: AIP Conference Proceedings, Vol. 700, Issue 1; Conference: 30. annual review of progress in quantitative nondestructive evaluation, Green Bay, WI (United States), 27 Jul - 1 Aug 2003; Other Information: DOI: 10.1063/1.1711767; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BENDING
ELECTROMAGNETIC RADIATION
FATIGUE
IRON
RESIDUAL STRESSES
SHOT PEENING
STEELS
STRESS ANALYSIS
SURFACES
TESTING