CUED Publications database

Fine scale structures from deformation of aluminium containing small alumina particles

Barlow, CY and Hansen, N and Liu, YL (2002) Fine scale structures from deformation of aluminium containing small alumina particles. Acta Materialia, 50. pp. 171-182. ISSN 1359-6454

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Abstract

Microstructures and mechanical properties have been studied in aluminium containing a fine dispersion of alumina particles, deformed by cold-rolling to strains between 1.4 and 3.5. The microstructure was characterised by TEM. The deformation structures evolved very rapidly, forming a nanostructured material, with fine subgrains about 0.2 μm in diameter and a fraction of high-angle boundaries which was already high at a strain of 1.4, but continued to increase with rolling strain. The yield stress and ductility of the rolled materials were measured in tension, and properties were similar for all materials. Yield stress measurements were correlated with estimates made using microstructural models. The role of small particles in forming and stabilising the deformation structure is discussed. This nanostructured cold-deformed alloy has mechanical properties which are usefully enhanced at comparatively low cost. This gives it, and similar particle-strengthened alloys, good potential for commercial exploitation. © 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Al alloys Dislocations Mechanical properties Microstructure Transmission electron microscopy (TEM)
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:40
Last Modified: 08 Dec 2014 02:35
DOI: 10.1016/S1359-6454(01)00330-5