Electricity: measuring and testing – Magnetic – Stress in material measurement
Patent
1990-07-23
1992-11-17
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Stress in material measurement
73598, 73801, 324227, 324232, G01B 3312, G01B 724, G01B 1704, G01N 2918
Patent
active
051646692
ABSTRACT:
The invention is a method and apparatus for characterizing residual uniaxial stress in a ferromagnetic test member by distinguishing between residual stresses resulting from positive (tension) forces and negative (compression) forces by using the distinct and known magnetoacoustic (MAC) and a novel magnetoacoustic emission (MAE) measurement circuit means. A switch permits the selective operation of the respective circuit means.
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Low-Field Magnetoacoustic Residual Stress Measurement In Steel, dated Sep. 18-20, 1985--M. Namkung et al.
Grainger John L.
Kushnick Peter W.
Namkung Min
Yost William T.
Osborne Kevin B.
Strecker Gerard R.
The United States of America as represented by the Administrator
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