SYMPOSIA PAPER Published: 01 January 1976
STP28673S

An Automated Method for Evaluating Resistance to Stress-Corrosion Cracking with Ring-Loaded Precracked Specimens

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This paper describes a ring-loading method for evaluating stress-corrosion resistance with precracked specimens and presents representative data for compact specimens of some high-strength aluminum alloys. The deflection of the ring was large relative to that of the specimen, simulating deadweight loading. This method provides several advantages over techniques previously used. Unlike most constant-displacement loading systems, the load and crack length and thus the stress intensity are known accurately throughout the life of each test, and the initiation and growth of stress-corrosion cracking (SCC) lead to a definitive end point (failure). Also, the effects of corrosion product wedging are minimal. The ring loading system is more compact than most deadweight systems, and because it is readily automated, data can be collected with the expenditure of few manhours.

Author Information

Kaufman, JG
Alcoa Laboratories, Aluminum Company of America, Alcoa Center, Pa.
Coursen, JW
Alcoa Laboratories, Aluminum Company of America, Alcoa Center, Pa.
Sprowls, DO
Alcoa Laboratories, Aluminum Company of America, Alcoa Center, Pa.
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Details
Developed by Committee: G01
Pages: 94–107
DOI: 10.1520/STP28673S
ISBN-EB: 978-0-8031-4684-6
ISBN-13: 978-0-8031-0580-5