Effect of temperature and strain rate on flow behavior and microstructure in 6061 aluminium containing Al{sub 2}O{sub 3} particles
- Univ. of Wollongong, NSW (Australia). Dept. of Materials Engineering
Effect of temperature and strain rate on deformation behavior of A1203 particle reinforced 6061 aluminum alloy was studied by hot compression in a temperature range of 200 to 500{degree}C and at constant strain rates 0.001 to 1 s{sup {minus}1}. Flow stress dependence of strain rate and temperature was used to evaluate stress exponent and activation energy for deformation. It was found that reinforced material exhibited higher value of stress exponent and activation energy for deformation than that of the monolithic alloy. Substructure size is found to be inversely related to 1nZ (Z is temperature compensated strain rate) and the flow stress, {sigma}, for both reinforced and unreinforced alloys. Much finer substructure was present in the reinforced material compared to the monolithic alloy under similar deformation conditions suggesting that the presence of the large ceramic particles in the matrix could be responsible in refining the microstructure and the strength in composite.
- OSTI ID:
- 143666
- Report Number(s):
- CONF-930246--; ISBN 0-87339-251-5
- Country of Publication:
- United States
- Language:
- English
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