Table of Contents
Textures and Microstructures
Volume 14 (1991)–18
http://dx.doi.org/10.1155/TSM.14-18.853

Texture and Grain Size Control During Annealing of an Al-SiC Composite Material

Materials Department, Risø National Laboratory, Roskilde DK-4000, Denmark

Copyright © 1991 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effects of different heat treatments on the recrystallized texture and grain size of 90% cold rolled aluminium reinforced by 2vol% SiC whiskers have been studied. Annealing temperatures in the range 250-510°C and 3 heating rates (25, 80, 400°C/min) were used. The recrystallization textures were determined by neutron diffraction and the grain sizes were measured by optical microscopy. It was found that the recrystallization textures are rotated cube textures ({100} <013 >) and the strength depends strongly on annealing temperature, (T) and heating rate (dT/dt) – peak intensities in the range from 6 to 22x random are measured. Also the grain size varies strongly (70-435 μm) with T and dT/dt. Simple maps relating the effects of T and dT/dt on texture and microstructure are constructed and it is discussed how T and dT/dt affects nucleation and growth.