Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1993-02-25
1995-05-30
Raevis, Robert
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73799, 324 711, G01N 332
Patent
active
054192013
ABSTRACT:
Devices and methods for determining the fatigue status of a metallic specimen are provided. The methods include contacting the specimen with-a cell containing an electrode and an electrolyte in contact with the specimen. A voltage is then applied, or galvanically created, between the specimen and the electrode, and the current is measured passing through the electrolyte during a period in which the specimen is subjected to cyclic stresses. A signature is then prepared which is representative of a measured current at the electrode, and the signature is analyzed to determine the fatigue status of the specimen.
REFERENCES:
Ortner et al., "The Mechanical Response of Copper Single Crystals to Corrosion-Fatigue in an Aqueous Oxide-Forming Environment", Acta Metall., vol. 35, No. 2, pp. 453-462 (1987).
Ortner, Summary and Conclusions of Thesis, University of Pennsylvania, pp. 160-168 (1985).
Yan et al., "Strain Localization in Single Crystals of Copper Cycled in 0.1 M Perchloric Acid Solution Under Potential Control", Acta Metall., vol. 33, No. 8, pp. 1533-1545 (1985).
Yan, Abstract of Thesis, University of Pennsylvania, pp. ii-iv (1984).
Magnin et al., "Corrosion Fatigue Mechanisms in B.C.C. Stainless Steels", Acta Metall., vol. 35, No. 8, pp. 2105-2113 (1987).
Yan et al., "The Interaction of Simultaneous Cyclic Straining and Aqueous Corrosive Attack in the Behavior of Persistent Slip Bands", Acta Metall., vol. 33, No. 9, pp. 1593-1600 (1985).
Pyle et al., "The Influence of Cyclic Plastic Strain on the Transient Dissolution Behavior of 18/8 Stainless Steel in 3.7M H.sub.2 SO.sub.4 ", Elec. Chem. Soc., vol. 122, No. 11, pp. 1445-1453 (1975).
Ortner et al., "The Electrochemical Response of Copper Single Crystals to Corrosion-Fatigue in an Aqueous, Oxide-Forming Environment", Acta Metall., vol. 35, No. 4, pp. 867-874 (1987).
Li et al., Abstract of Thesis, "Cyclic Response-Electrochemical Interaction in Mono- and Polycrystalline AISI316L Stainless Steel", University of Pennsylvania, pp. iv-v (Mar. 2, 1992).
Li et al., proposed article, "Cyclic Response-Electrochemical Interaction in Mono- and Polycrystalline AISI 316L Stainless Steel in H.sub.2 SO.sub.4 Solution: Part I", University of Pennsylvania, (unpublished).
Laird Campbell
Li Yuanfeng
Cronk Peter J.
Raevis Robert
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