SYMPOSIA PAPER Published: 24 August 2020

A Variable Strength Stress-Corrosion Test Specimen


This paper describes a unique variable-strength test specimen and loading procedure which can be used to minimize the number of tests required to characterize the effect of material strength level on the threshold stress intensity for environment-induced crack growth (KIssc). The procedure involves axial wedge loading of a cylindrical specimen which previously has been heat treated to yield a strength gradient along the length of the bar. KIssc results obtained for an American Iron and Steel Institute (AISI) Type 4340 steel exposed to seawater are used to illustrate the feasibility and advantages of this new test method.

Author Information

Clark, W., G.
Materials Reliability Research, Westinghouse Research and Development Center, Pittsburgh, Pa., US
Ernst, H., A.
Materials Engineering Dept., Westinghouse Research and Development Center, Pittsburgh, Pa., US
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Developed by Committee: E08
Pages: 143–156
DOI: 10.1520/STP791B1983009
ISBN-EB: 978-0-8031-7720-8
ISBN-13: 978-0-8031-0729-8