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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Thermoelastic Stress Analysis: An NDE Tool for Residual Stress Assessment of Metallic Alloys

[+] Author and Article Information
A. L. Gyekenyesi

Ohio Aerospace Institute, NASA Glenn Research Center, 21000 Brookpark Road, MS 6-1, Cleveland, OH 44135

J. Eng. Gas Turbines Power 124(2), 383-387 (Mar 26, 2002) (5 pages) doi:10.1115/1.1417982 History: Received November 01, 1999; Revised February 01, 2000; Online March 26, 2002
Copyright © 2002 by ASME
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References

Figures

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Schematic diagram of TSA system (DeltaTherm 1000 User’s Manual)
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Typical IR test image for TIMETAL 21S specimen. The rectangular box within the specimen indicates the area where the average signal was obtained. The scale displays the dimensionless digital values of the IR camera signal.
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Temperature dependence of TSA IR signal. Data consists of eight tests utilizing three specimens. All tests normalized by corresponding IR signals at 23°C. Equation represents first-order linear regression fit of all data.
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Mean stress dependence of IR signal for three specimens. Equation represents first-order linear regression fit of all data.
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First harmonic IR signal output at various stress amplitudes (σm=0). The plot contains data from three specimens; each with three repetitions. Equation represents first-order linear regression fit of all data.
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Second harmonic IR signal output at various amplitudes (σm=0). The plot contains data from three specimens; each with three repetitions. Equation represents first-order linear regression fit of all data.

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