Stress-Corrosion Susceptibility of High-Strength Steel, in Relation to Fracture Toughness

[+] Author and Article Information
J. H. Mulherin

Pitman-Dunn Research Laboratories, Frankford Arsenal, Philadelphia, Pa.

J. Basic Eng 88(4), 777-782 (Dec 01, 1966) (6 pages) doi:10.1115/1.3645960 History: Received February 17, 1966; Online November 03, 2011


The stress-corrosion susceptibility of several ultrahigh-strength ferrous alloys is described on the basis of fracture-mechanics parameters. Two general conditions were considered: First, the susceptibility of a material at various levels of tensile yield strength and fracture toughness; and second, the susceptibility as a function of applied subcritical stress-intensity levels. Experimentally, a notched and fatigue-cracked bendbar specimen configuration was used. Under a subcritical load, fracture of the specimen occurs upon sufficient environmentally influenced crack extension. The susceptibility criterion adopted in this investigation was the time period to catastrophic fracture of the specimen. The results are evaluated in terms of strength level and fracture toughness, and the usefulness of the data generated is examined in terms of material evaluation and application.

Copyright © 1966 by ASME
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