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Elevated-temperature fatigue crack growth behavior of a rotor steel

โœ Scribed by P.K. Liaw; V.P. Swaminathan

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
460 KB
Volume
34
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

A~~act-Elevate-tem~rature fatigue crack growth behavior was investigated on a rotor steel. Increasing the tem~rature increased the rates of crack propagation. The activation energy for high-temperature crack growth was found to be comparable to that for oxide formation. A repeated process of crack-tip oxide formation and oxide cracking was suggested to be. the possible mechanism for promoting elevated-temperature, air-environment fatigue crack propagation. A comparison of crack growth rates in air and argon environments seemed to support the proposed mechanism.

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