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TECHNICAL PAPERS: Gas Turbines: Manufacturing, Materials, and Metallurgy

Stress Relaxation Testing of Service Exposed IN738 for Creep Strength Evaluation

[+] Author and Article Information
David A. Woodford

Materials Performance analysis, Inc., 1707 Garden Street, Santa Barbara, CA 93101

J. Eng. Gas Turbines Power 122(3), 451-456 (May 15, 2000) (6 pages) doi:10.1115/1.1287345 History: Received March 09, 1999; Revised May 15, 2000
Copyright © 2000 by ASME
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References

Figures

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Stress-strain curves for specimen 6L at 860C
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Stress versus Ln time at 850C for specimen 6L
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Stress versus creep rate at 850C for specimen 6L
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Pseudo stress-strain curves at 850C as a function of creep rate
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Stress versus creep rate curves from 0.4 percent strain as a function of test temperature
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Stress versus parameter plot showing possible design points at 800C and 850C
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Stress versus predicted time to 0.5 percent creep compared with actual long time creep data
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Stress-strain curves at 850C for miniature specimens from vane
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Stress-strain curves at 850C for miniature specimens from blade
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Stress versus predicted time to 0.5 percent creep for blade specimens
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Stress versus creep rate for all specimens at 850C
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Tensile tests to failure of miniature specimens

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