Equal-channel angular pressing of an Al-6061 metal matrix composite
Equal-channel angular pressing of an Al-6061 metal matrix composite
An Al-6061 metal matrix composite, reinforced with 10 vol % Al2O3 particulates, was subjected to equal-channel angular (ECA) pressing at room temperature to a total strain of ~5. It is shown that the intense plastic straining introduced by ECA pressing reduces the grain size from ~35 µm to ~1 µm and this leads to an increase in the microhardness measured at room temperature. Inspection revealed some limit cracking of the larger Al2O3 particulates as a consequence of the ECA pressing. Tensile testing after ECA pressing gave a maximum ductility of ~235% at a temperature of 853 K when testing at strain rates from ~10-4 to ~10-3 s-1. It is suggested that high strain rate superplasticity is not achieved in this material after ECA pressing due to the presence of relatively large Al2O3 particulates.
1201-1204
Li, Y.
d53810d0-bc88-491d-b315-9b9273d7bf52
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
March 2000
Li, Y.
d53810d0-bc88-491d-b315-9b9273d7bf52
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Li, Y. and Langdon, T.G.
(2000)
Equal-channel angular pressing of an Al-6061 metal matrix composite.
Journal of Materials Science, 35 (5), .
(doi:10.1023/A:1004740504619).
Abstract
An Al-6061 metal matrix composite, reinforced with 10 vol % Al2O3 particulates, was subjected to equal-channel angular (ECA) pressing at room temperature to a total strain of ~5. It is shown that the intense plastic straining introduced by ECA pressing reduces the grain size from ~35 µm to ~1 µm and this leads to an increase in the microhardness measured at room temperature. Inspection revealed some limit cracking of the larger Al2O3 particulates as a consequence of the ECA pressing. Tensile testing after ECA pressing gave a maximum ductility of ~235% at a temperature of 853 K when testing at strain rates from ~10-4 to ~10-3 s-1. It is suggested that high strain rate superplasticity is not achieved in this material after ECA pressing due to the presence of relatively large Al2O3 particulates.
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Published date: March 2000
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 48601
URI: http://eprints.soton.ac.uk/id/eprint/48601
ISSN: 0022-2461
PURE UUID: df71d428-1b70-400c-9e08-c2ba4cec77bb
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Date deposited: 19 Oct 2007
Last modified: 16 Mar 2024 03:28
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Author:
Y. Li
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