The characteristics of aluminum–scandium alloys processed by ECAP
The characteristics of aluminum–scandium alloys processed by ECAP
Aluminum–scandium alloys were prepared having different scandium additions of 0.2, 1.0 and 2.0 wt.% and these alloys were processed by equal-channel angular pressing (ECAP) at 473 K. The results show the grain refinement of the aluminum matrix and the morphology of the Al3Sc precipitates depends strongly on the scandium concentration. The tensile properties were evaluated after ECAP by pulling to failure at initial strain rates from 1.0 × 10?3 to 1.0 × 10?1 s?1. The Al–1% Sc alloy exhibited the highest tensile strength of 250 MPa at a strain rate of 1.0 × 10?1 s?1. This alloy also exhibited a superior grain refinement of 0.4 ?m after ECAP where this is attributed to a smaller initial grain size and an optimum volume fraction of dispersed Al3Sc precipitates having both micrometer and nanometer sizes.
aluminum alloys, equal-channel angular pressing, scandium, tensile testing, ultrafine grains
1448-1452
Venkateswarlu, K.
5bdfe52c-a221-4f27-83fa-638f30e91bb0
Rajinikanth, V.
bf3b6c76-3b77-47f5-b303-a00580438ad2
Ray, Ajoy Kumar
1f4be935-4dc7-41a9-a86d-b92467e5cf4e
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
15 March 2010
Venkateswarlu, K.
5bdfe52c-a221-4f27-83fa-638f30e91bb0
Rajinikanth, V.
bf3b6c76-3b77-47f5-b303-a00580438ad2
Ray, Ajoy Kumar
1f4be935-4dc7-41a9-a86d-b92467e5cf4e
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Venkateswarlu, K., Rajinikanth, V., Ray, Ajoy Kumar, Xu, Cheng and Langdon, Terence G.
(2010)
The characteristics of aluminum–scandium alloys processed by ECAP.
Materials Science and Engineering: A, 527 (6), .
(doi:10.1016/j.msea.2009.10.047).
Abstract
Aluminum–scandium alloys were prepared having different scandium additions of 0.2, 1.0 and 2.0 wt.% and these alloys were processed by equal-channel angular pressing (ECAP) at 473 K. The results show the grain refinement of the aluminum matrix and the morphology of the Al3Sc precipitates depends strongly on the scandium concentration. The tensile properties were evaluated after ECAP by pulling to failure at initial strain rates from 1.0 × 10?3 to 1.0 × 10?1 s?1. The Al–1% Sc alloy exhibited the highest tensile strength of 250 MPa at a strain rate of 1.0 × 10?1 s?1. This alloy also exhibited a superior grain refinement of 0.4 ?m after ECAP where this is attributed to a smaller initial grain size and an optimum volume fraction of dispersed Al3Sc precipitates having both micrometer and nanometer sizes.
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Published date: 15 March 2010
Keywords:
aluminum alloys, equal-channel angular pressing, scandium, tensile testing, ultrafine grains
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 170399
URI: http://eprints.soton.ac.uk/id/eprint/170399
ISSN: 0921-5093
PURE UUID: b9540eec-1896-476d-a003-abcacd9feb00
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Date deposited: 06 Jan 2011 12:13
Last modified: 14 Mar 2024 02:47
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Contributors
Author:
K. Venkateswarlu
Author:
V. Rajinikanth
Author:
Ajoy Kumar Ray
Author:
Cheng Xu
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