Notch-Strengthening Phenomenon Under Creep-Fatigue Loading Conditions

[+] Author and Article Information
N. Merah

Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, P.O. Box 1758, Dhahran 31261, Saudi Arabia

J. Pressure Vessel Technol 122(1), 15-21 (Oct 11, 1999) (7 pages) doi:10.1115/1.556140 History: Received October 19, 1998; Revised October 11, 1999
Copyright © 2000 by ASME
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Notched specimen geometry and dimensions
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σ-Nf curves of notched and unnotched plate specimens of SS 304 at 600°C and ν=1 Hz
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Nf variation with Kt and σ at T=600°C and ν=1 Hz
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Variation of slope m with applied nominal stress
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Variation of parameter A with strain-hardening exponent
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Creep-fatigue life in terms of applied stress for (a)th=1.0 min, and (b)th=5.0 min
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Local stress relaxation and redistribution at notch root plane
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Creep strain cumulation during hold-time
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Comparison between the experimental data and the results given by different methods for th=0 min
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Comparison between experimental data and predicted results given by different methods
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Cyclic behavior of local stresses in terms of local total strains
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Effect of frequency, Kt and σ on the creep-fatigue life of notched plate specimens
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Hold-time effect on the life of smooth plate specimens and notched plate specimens




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