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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Steady-state diffusional creep
Philosophical Magazine, Volume 16, No. 140, Year 1967
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Description
The theory of steady-state diffusional creep is developed for a material in which the grains are large and the dislocations form the principal sources and sinks for vacancies. Under a given applied shear stress p there is an equilibrium length of link in the dislocation network, only slightly longer than that link which provides a dislocation source under the applied stress. The dislocation density increases by the operation of Bardeen-Herring sources, and decreases as dislocations of opposite sign climb towards one another and annihilate. When diffusion occurs predominantly through the bulk of the crystal, the rate of strain is proportional to p3. At lower temperatures, where diffusion occurs predominantly along the cores of dislocations, the rate of strain is proportional to p5. © 1967 Taylor & Francis Group, LLC.
Authors & Co-Authors
Nabarro, Frank R.N.
United Kingdom, Cambridge
Department of Physics
South Africa, Johannesburg
University of the Witwatersrand
Statistics
Citations: 345
Authors: 1
Affiliations: 2
Identifiers
Doi:
10.1080/14786436708229736
ISSN:
00318086