Please use this identifier to cite or link to this item:
http://hdl.handle.net/11375/17930
Title: | Embrittlement of CU-17Al Alloy By Liquid Mercury |
Authors: | Hancock, Peter Colin |
Advisor: | Ives, M.B. Embury, J.D. |
Department: | None |
Keywords: | embrittlement, alloy, liquid, mercury, cracks, boundary, stress |
Publication Date: | Jul-1967 |
Abstract: | <p> The role of plastic deformation in the initiation and propagation of cracks in Cu-17Al 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. A crack initiation mechanism is proposed involving grain boundary diffusion enhanced by the stress concentration at the head of dislocation pile-ups at the grain boundary. Micro-cracks are formed at the weakened grain boundary 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.</p> |
URI: | http://hdl.handle.net/11375/17930 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Hancock_Peter_C._1967Jul_Masters..pdf | 7.45 MB | Adobe PDF | View/Open |
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