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Edge dislocation; nanoscale inhomogeneity; interface stress.

According to the Mott and Nabarro’s model, the contribution to the critical shear stress of the material caused by the interaction between edge dislocations and nanoscale cylindrical inhomogeneities with interface stresses is obtained. The influence of the radius and the volume fraction of the inhomogeneity as well as the interface stresses on the critical shear stress is investigated. The important result is that, if the interface stress is considered, a maximum of the contribution to the critical shear stress produced by this interaction may be obtained when the radius of the inhomogeneity reaches a critical value.

Q H Fang¹ J M Chen¹ Y W Liu¹ P H Wen²

1. Department of Mechanical Engineering, Hunan International Economics University, Changsha 410205, P.R. China
2. Department of Engineering, Queen Mary, University of London, London EI 4NS, UK

Published

April 2010

Manuscript received

30 December 2008

Manuscript revised

26 April 2009