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RESEARCH PAPERS

Corrosion-Fatigue Crack Propagation Studies of Some New High-Strength Structural Steels

[+] Author and Article Information
T. W. Crooker, E. A. Lange

Structural Metals Criteria Section, Strength of Metals Branch, Metallurgy Division, Naval Research Laboratory, Washington, D. C.

J. Basic Eng 91(4), 570-574 (Dec 01, 1969) (5 pages) doi:10.1115/1.3571190 History: Received January 10, 1969; Online November 03, 2011

Abstract

Fatigue crack propagation studies were conducted on three new high-strength structural steels: 9Ni–4Co–0.20C quenched-and-tempered, 10Ni–2Cr–1Mo–8Co dual-strengthened, and 13Cr–8Ni–2Mo precipitation-hardened stainless. The yield strengths of these steels ranged from 176 to 193 ksi. Notched cantilever-bend specimens of each steel were cycled zero-to-tension in two environments, room air and 3.5 percent NaCl salt water. Fatigue crack growth rates were measured experimentally and correlated with the crack tip stress-intensity factor range. The results indicate that these new steels possess greater resistance to fatigue crack propagation and less sensitivity to environment than previously studied steels of comparable strength.

Copyright © 1969 by ASME
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