CUED Publications database

A microstructural investigation of deformation in fine SiC particulate- and whisker-reinforced aluminium-matrix composites

Barlow, CY and Hansen, N and Liu, YL (1993) A microstructural investigation of deformation in fine SiC particulate- and whisker-reinforced aluminium-matrix composites. Journal of Microscopy, 169. pp. 225-232. ISSN 0022-2720

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Abstract

Aluminium-based composites, reinforced with low volume fractions of whiskers and small particles, have been formed by a powder route. The materials have been tested in tension, and the microstructures examined using transmission electron microscopy. The whisker composites showed an improvement in flow stress over the particulate composites, and this was linked to an initially enhanced work-hardening rate in the whisker composites. The overall dislocation densities were estimated to be somewhat higher in the whisker composites than the particulate composites, but in the early stages of deformation the distribution was rather different, with deformation in the whisker material being far more localized and inhomogeneous. This factor, together with differences in the internal stress distribution in the materials, is used to explain the difference in mechanical properties.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:40
Last Modified: 26 Nov 2014 19:06
DOI: