An analysis of the effect of multiaxial stresses and grain shape on Nabarro-Herring creep
- 1 April 1985
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 51 (4) , 537-542
- https://doi.org/10.1080/01418618508237575
Abstract
The rate of Nabarro-Herring creep is known to depend strongly on grain size and shape since it involves the diffusion distances of vacancies between their sources and sinks. The anisotropy of creep rate by this mechanism is thus apparent in materials in which grains are not equiaxed. An analysis is presented which shows that the response to multiaxial stress is also strongly influenced by such anisotropy. From the analysis, formulae are derived which permit the creep rate along three axes parallel to the three principal stresses to be calculated for orthorhombic grains of different shapes.Keywords
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