The development of superplastic ductilities and microstructural homogeneity in a Magnesium ZK60 alloy processed by ECAP


Figueiredo, Roberto B and Langdon, Terence G. (2006) The development of superplastic ductilities and microstructural homogeneity in a Magnesium ZK60 alloy processed by ECAP. Materials Science and Engineering: A, 430, (1-2), 151-156. (doi:10.1016/j.msea.2006.05.056).

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Description/Abstract

An extruded ZK60 magnesium alloy was processed by equal-channel angular pressing (ECAP) and then tested in tension at elevated temperatures. The results show the alloy is superplastic at a testing temperature of 473 K with an optimum ductility of ~1310% when using an initial strain rate of 2.0 × 10−4 s−1. The results demonstrate that optimum superplasticity is achieved at intermediate strain rates and there are decreases in the elongations to failure at both faster and slower strain rates. Microhardness measurements were taken both on the cross-sectional plane and along the axial direction after processing by ECAP. These measurements show the alloy is essentially homogeneous in the as-pressed condition.

Item Type: Article
ISSNs: 0921-5093 (print)
Related URLs:
Keywords: equal-channel angular pressing (ecap), homogeneity, magnesium alloys, severe plastic deformation, superplasticity
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 43682
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/43682

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