Modeling the Effects of Damage and Microstructural Evolution on the Creep Behavior of Engineering Alloys

[+] Author and Article Information
M. McLean, B. F. Dyson

Department of Materials, Imperial College of Science, Technology and Medicine, Prince Consort Road, London SW7 2BP, UK

J. Eng. Mater. Technol 122(3), 273-278 (Feb 23, 2000) (6 pages) doi:10.1115/1.482798 History: Received October 15, 1999; Revised February 23, 2000
Copyright © 2000 by ASME
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Grahic Jump Location
Illustrating the similarity in the shapes of creep curves of disparate commercial alloys
Grahic Jump Location
Demonstrating that tension/compression asymmetries can vary significantly between alloy systems
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Lifetimes of “new” and service-exposed 1Cr1/2Mo steels at 550°C: data and predictions (Ref. 8)
Grahic Jump Location
Demonstrating the benign effect of prior thermal aging on the creep response of a commercial precipitation-hardened alloy, IN738LC (Ref. 9)
Grahic Jump Location
Demonstrating the creep softening effect of prior plastic deformation. (a) Nimonic 80A at 154MPa/750°C; (b) aluminum alloy 2056 at 250MPa/175°C.
Grahic Jump Location
Demonstrating the effect of prior plastic prestrain at room temperature on the creep response of a commercial solid solution alloy, Nimonic 75 (Ref. 13)
Grahic Jump Location
Comparison between model predictions incorporating single and multiple damage mechanisms and strain rate data from a 12% Cr steel
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Comparison of lifetime predictions under two-step loading, using “strain hardening” and CDM methods. (a) 170 MPa to 250 MPa; (b) 250 to 170 MPa.



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