The Effect of Specimen Thickness Upon the Fatigue Crack Growth Rate of A516-60 Pressure Vessel Steel

[+] Author and Article Information
A. M. Sullivan, T. W. Crooker

Engineering Materials Division, Naval Research Laboratory, Washington, D.C.

J. Pressure Vessel Technol 99(2), 248-252 (May 01, 1977) (5 pages) doi:10.1115/1.3454528 History: Received June 15, 1976; Online October 25, 2010


Fatigue crack growth rate studies on A516-60 pressure vessel steel indicate no effect of specimen thickness in stress-relieved specimens ranging in thickness from 0.25 to 2.0 in. (6.35 to 50.8 mm). A regression curve equation for all thicknesses relating cyclic crack growth rate (da/dN) to crack-tip stress-intensity factor range (ΔK) is obtained. The significance of these results is discussed in the light of current engineering practice and previous studies on size effects in fatigue crack propagation.

Copyright © 1977 by ASME
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