Particle Redistribution and Grain Refinement during Processing by Hydrostatic Extrusion

Abstract:

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In this study particle redistribution and grain size refinement induced by hydrostatic extrusion (HE) have been studied in two Al-Si cast alloys (Al-9%Si and Al-11%Si). It has been found that HE results in a significant changes in particle shape, size and distribution which was revealed by SEM observations and quantified using stereological parameters. At the same time, significant grain refinement down to ~100 nm in diameter takes place in aluminium phase. Such a microstructure evolution affects substantially the mechanical properties of two-phase alloys. The yield strength and tensile strength increase over two times whereas the plasticity only slightly decreases.

Info:

Periodical:

Materials Science Forum (Volumes 584-586)

Edited by:

Yuri Estrin and Hans Jürgen Maier

Pages:

541-546

DOI:

10.4028/www.scientific.net/MSF.584-586.541

Citation:

K. Wawer et al., "Particle Redistribution and Grain Refinement during Processing by Hydrostatic Extrusion", Materials Science Forum, Vols. 584-586, pp. 541-546, 2008

Online since:

June 2008

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Price:

$35.00

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