Accession Number:

AD0657379

Title:

THE EMBRITTLEMENT OF COPPER-17 ATOMIC % ALUMINUM ALLOY BY LIQUID MERCURY.

Descriptive Note:

Technical rept.,

Corporate Author:

MCMASTER UNIV HAMILTON (ONTARIO) DEPT OF METALLURGY AND METALLURGICAL ENGINEERING

Personal Author(s):

Report Date:

1967-08-01

Pagination or Media Count:

119.0

Abstract:

The role of plastic deformation in the initiation and propagation of cracks in Cu-17A1 alloy embrittled by liquid mercury has been studied. It is proposed that extensive plastic deformation and work hardening must occur at the crack-tip during propagation in order to raise the local flow stress to a critical level at which the maximum normal stress is equal to the cohesive strength. Strong indication is given that a critical applied stress criterion for fracture is not applicable for this material. Micro-cracks are formed at weakened grain boundaries and a period of stable crack growth made over a period of increasing applied stress may be necessary before the crack is long enough to become unstable. Author

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE