SYMPOSIA PAPER Published: 01 January 1967

A Proposed Mechanism for the Stress Corrosion Fracture of a Copper-Beryllium Alloy


Polycrystalline specimens of a copper-beryllium alloy (1.8 per cent Be) were bent and exposed to an ammonia atmosphere. Two lots of polycrystalline material of similar chemical composition but of different grain size and distribution of segregates were investigated. Specimens were subjected to different values of plastic deformation and humidity conditions. Plastic deformation appears to be an essential factor in stress corrosion fracture. The importance of humidity conditions was emphasized by the results obtained. Both modes of fracture, transcrystalline and intercrystalline, were observed. It was found that the distribution of segregates determines which of these two modes of fracture will occur. A mechanism of stress corrosion fracture in a copper-beryllium alloy is proposed.

Author Information

Sylwestrowicz, W., D.
Bell Telephone Laboratories, Inc., Murray Hill, N. J.
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Developed by Committee: G01
Pages: 145–164
DOI: 10.1520/STP46459S
ISBN-EB: 978-0-8031-6808-4
ISBN-13: 978-0-8031-6638-7