Fatigue Crack Growth Rate Testing of Gun Steels

[+] Author and Article Information
J. Morrison

Defence Research Establishment Pacific, FMO Victoria, British Columbia, Canada

C. H. Laforce

Defence Research Establishment Valcartier, Courcelette, Quebec, Canada

J. Pressure Vessel Technol 108(4), 507-513 (Nov 01, 1986) (7 pages) doi:10.1115/1.3264821 History: Received November 28, 1984; Revised December 04, 1985; Online November 05, 2009


The experimental measurement of fatigue crack growth rates is an integral part of the fracture mechanics approach to safe life estimation in structures subjected to cyclical loading. To assess the variation in crack growth properties, data has been collected from five different gun steels from various sources. The experimental, analytical and statistical techniques are described, and an assessment is made of the applicability of a single growth rate expression. There are significant differences in strength, toughness and extent of autofrettage between these gun steels, and a correspondingly wide range of fatigue crack growth rates has been encountered.

Copyright © 1986 by ASME
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