Sustained-Load Crack-Growth in Inconel 718 Under Nonisothermal Conditions

[+] Author and Article Information
G. K. Haritos

Department of Aeronautics and Astronautics, Air Force Institute of Technology, (AFIT/ENY), Wright-Patterson AFB, Ohio 45433

D. L. Miller

Department of Engineering Mechanics, USAF Academy (USAFA/DFEM), Colo. 80840

T. Nicholas

Materials Laboratory, Air Force Wright Aeronautical Laboratories (AFWAL/MLLN), Wright-Patterson AFB, Ohio 45433

J. Eng. Mater. Technol 107(2), 172-179 (Apr 01, 1985) (8 pages) doi:10.1115/1.3225795 History: Received May 14, 1984; Online September 23, 2009


Sustained-load crack-growth experiments were conducted under isothermal and nonisothermal conditions. Temperature cycling was conducted between 537° and 649°C. Hold times at minimum and/or maximum temperature were included in the temperature profiles. An analytical model was developed to predict crack-growth rates based solely on isothermal data. The linear cumulative damage model was able to predict crack-growth rates in Inconel 718 for all the temperature profiles investigated including a proof test.

Copyright © 1985 by ASME
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