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), 188-194. (doi:10.1016/j.msea.2006.04.053).
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Description/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 μm, reduces the size of the Si particles from ~12.0 to ~1.08 μm 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.
| Item Type: | Article |
|---|---|
| ISSNs: | 0921-5093 (print) |
| Related URLs: | |
| Keywords: | aluminum–silicon alloy, equal channel angular pressing, indentation testing, severe plastic deformation, ultrafine grains |
| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering |
| Item ID: | 43670 |
| Date Deposited: | 26 Jan 2007 |
| Last Modified: | 02 Mar 2012 11:29 |
| Contributors: | Venkateswarlu, K. (Author) Das, Gautam (Author) Pramanik, A.K. (Author) Xu, Cheng (Author) Langdon, Terence G. (Author) |
| Date: | 2006 |
| Status: | Published |
| Contact Email Address: | langdon@usc.edu |
| URI: | http://eprints.soton.ac.uk/id/eprint/43670 |
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