Nondestructive detection of an undesirable metallic phase, T.sub

Details Nondestructive detection of an undesirable metallic phase, T.sub Nondestructive detection of an undesirable metallic phase, T.sub

1989-01-03

1990-08-07

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Plural tests

324234, G01N 2780, G01R 3312

Patent

active

049471171

ABSTRACT:
A method is disclosed for detecting the T.sub.1 phase in aluminum-lithium alloys through simultaneous measurement of conductivity and hardness. In employing eddy current to measure conductivity, when the eddy current decreases with aging of the alloy, while the hardness of the material continues to increase, the presence of the T.sub.1 phase may be detected.

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Review of Progress in Quantitative Non-Destructive Evaluation, by D. J. Bracci, P. Garikepati, D. C. Jiles, and O. Buck, vol. 6B, Thompson and Chimenti, Eds. (Plenum Publishing). Article entitled "NDE Methods for Determination of Thermo-History and Mechanical Properties of Al-Li Alloys", pp. 1395-1402, Jul. 1987.
Review of Progress in Quantitative Non-Destructive Evaluation, by D. J. Bracci, P. Garikepati, D. C. Jiles and O. Buck, vol. 7B, Thompson and Chimenti, Eds. (Plenum Publishing). Article entitled "Search for NDE Methods to Characterize Thermo-History and Mechanical Properties of Al-Li Alloys", pp. 1255-1262, Jul. 1988.
Review of Progress in Quantitative Non-Destructive Evaluation, by L. J. H. Brache, O. Buck, D. C. Jiles, J. D. Snodgrass, and D. C. Bracci, vol. 8, Thompson and Chimenti, Eds. (Plenum Publishing). Article entitled: "Determination of Selected Mechanical Properties of Aged Al-Li Alloys Using NDE Methods".

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