Image icon  Cavity formation in a tensile loaded alumina particulate composite

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Description: Horizontal stringers of fine oxide particles can be seen, parallel to the extrusion direction (horizontal). Under the tensile load, voids have nucleated at the interface between the matrix and the reinforcement particles, and some particle fracture has also occurred. Most voids form on planar faces normal to the tensile load (horizontal), and particularly where stringers of fine oxide particles also intersect the interface. These stringers provide interfacial flaws which may then be preferential sites for cavity nucleation.
Keywords: alumina • annealing • cavity • composite material • drawing • extrusion • MMC • particle • reinforcement • tensile
Categories: Science approaches > Deformation & failure > Fracture
Science approaches > Microstructure
Processes > Shaping > Deformation > Extrusion
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: Prof T W Clyne, Department of Materials Science and Metallurgy, University of Cambridge
DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
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Date created: 03 October 2002
Date added: 21 August 2009
Resource ID: 1649