The development of superplastic ductilities and microstructural homogeneity in a Magnesium ZK60 alloy processed by ECAP
The development of superplastic ductilities and microstructural homogeneity in a Magnesium ZK60 alloy processed by ECAP
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.
equal-channel angular pressing (ecap), homogeneity, magnesium alloys, severe plastic deformation, superplasticity
151-156
Figueiredo, Roberto B
202312de-f763-4e1b-adb3-24ef995be4ee
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2006
Figueiredo, Roberto B
202312de-f763-4e1b-adb3-24ef995be4ee
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
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), .
(doi:10.1016/j.msea.2006.05.056).
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.
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Published date: 2006
Keywords:
equal-channel angular pressing (ecap), homogeneity, magnesium alloys, severe plastic deformation, superplasticity
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 43682
URI: http://eprints.soton.ac.uk/id/eprint/43682
ISSN: 0921-5093
PURE UUID: 4a342883-33f1-4261-97d1-cc4a035c4263
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Date deposited: 26 Jan 2007
Last modified: 16 Mar 2024 03:28
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Author:
Roberto B Figueiredo
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