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Using ball-indentation to evaluate the properties of an unltrafine-grained Al-2% Si Alloy processed by ECAP

Venkateswarlu, K., Das, Gautam, Pramanik, A.K., Xu, Cheng and Langdon, Terence G. (2006) Using ball-indentation to evaluate the properties of an unltrafine-grained Al-2% Si Alloy processed by ECAP Materials Science and Engineering: A, 427, (1-2), pp. 188-194. (doi:10.1016/j.msea.2006.04.053).

Record type: Article

Abstract

As-cast Al–Si alloys exhibit excellent mechanical properties but these properties may be further improved through processing by equal-channel angular pressing (ECAP). In this investigation, specimens of a hypo-eutectic Al–2% Si alloy were successfully pressed up to a maximum of four passes at room temperature and the microstructures and mechanical properties were evaluated. The results show that pressing through four passes reduces the grain size from ~40 to ~0.70 ?m, reduces the size of the Si particles from ~12.0 to ~1.08 ?m and increases the yield stress and the ultimate tensile strength by a factor of ~2 by comparison with the as-cast alloy. The mechanical properties were examined using a ball-indentation technique (BIT). It is suggested that, since BIT provides the capability of obtaining extensive mechanical data using only a very small sample, it is an ideal technique for evaluating the properties of samples processed by ECAP.

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More information

Published date: 2006
Keywords: aluminum–silicon alloy, equal channel angular pressing, indentation testing, severe plastic deformation, ultrafine grains
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 43670
URI: http://eprints.soton.ac.uk/id/eprint/43670
ISSN: 0921-5093
PURE UUID: ac4c467c-7ca7-4723-b716-deba7ff7aec4
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 26 Jan 2007
Last modified: 17 Jul 2017 15:18

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Contributors

Author: K. Venkateswarlu
Author: Gautam Das
Author: A.K. Pramanik
Author: Cheng Xu

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