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RESEARCH PAPERS

Fatigue-Crack Propagation Behavior of Incoloy 800 at Elevated Temperatures

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

Westighouse Hanford Co., Richland, Wash.

J. Eng. Mater. Technol 96(4), 249-254 (Oct 01, 1974) (6 pages) doi:10.1115/1.3443238 History: Received December 10, 1973; Revised February 27, 1974; Online August 17, 2010

Abstract

Linear-elastic fracture mechanics techniques were used to characterize the fatigue-crack propagation behavior of Incoloy 800 in an air environment over the temperature range 75 to 1200 deg F (24 to 649 deg F). Crack growth rates were measured over the range 5×10−7 to 5×10−5 in./cycle. Material Grades 1 and 2 were found to exhibit essentially the same behavior over this range. In general, crack growth rates increased with increasing test temperature, although the increases were less then previously noted for austenitic stainless steels. This difference is probably related to the superior oxidation resistance of Incoloy 800.

Copyright © 1974 by ASME
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