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).

Download

Full text not available from this repository.

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
ePrint ID: 43670
Date Deposited: 26 Jan 2007
Last Modified: 27 Mar 2014 18:28
Contact Email Address: langdon@usc.edu
URI: http://eprints.soton.ac.uk/id/eprint/43670

Actions (login required)

View Item View Item