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Improving the high-temperature mechanical properties of a magnesium alloy by equal-channel angular pressing

Improving the high-temperature mechanical properties of a magnesium alloy by equal-channel angular pressing
Improving the high-temperature mechanical properties of a magnesium alloy by equal-channel angular pressing
Equal-channel angular pressing (ECAP) was conducted on a Mg–0.55% Zr alloy at a temperature of 513 K. It is shown that processing by ECAP refines the grain size from ~75 to ~8.6 ?m. Tensile testing was performed at temperatures from 473 to 773 K and at initial strain rates from 10?5 to 10?2 s?1 using specimens in the as-received condition and after processing by ECAP through six passes. There is a higher strength in the as-received Mg–Zr alloy than in the Mg–Zr alloy after ECAP for six passes at a temperature of 513 K. The results show the tensile elongations are higher after ECAP and a maximum elongation of ~380% was achieved in the as-pressed material at 773 K using an initial strain rate of 4.2 × 10?5 s?1. The strain rate sensitivity for the as-pressed alloy was estimated as ~0.17 and the activation energy were intermediate between the values for grain boundary and lattice diffusion in magnesium.
equal-channel angular pressing, magnesium, mechanical properties, tensile testing
0921-5093
435-438
Han, Bing Q.
4e40aee4-e7be-4058-a3b3-31750ef8b354
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Han, Bing Q.
4e40aee4-e7be-4058-a3b3-31750ef8b354
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Han, Bing Q. and Langdon, Terence G. (2005) Improving the high-temperature mechanical properties of a magnesium alloy by equal-channel angular pressing. Materials Science and Engineering: A, 410-411, 435-438. (doi:10.1016/j.msea.2005.08.084).

Record type: Article

Abstract

Equal-channel angular pressing (ECAP) was conducted on a Mg–0.55% Zr alloy at a temperature of 513 K. It is shown that processing by ECAP refines the grain size from ~75 to ~8.6 ?m. Tensile testing was performed at temperatures from 473 to 773 K and at initial strain rates from 10?5 to 10?2 s?1 using specimens in the as-received condition and after processing by ECAP through six passes. There is a higher strength in the as-received Mg–Zr alloy than in the Mg–Zr alloy after ECAP for six passes at a temperature of 513 K. The results show the tensile elongations are higher after ECAP and a maximum elongation of ~380% was achieved in the as-pressed material at 773 K using an initial strain rate of 4.2 × 10?5 s?1. The strain rate sensitivity for the as-pressed alloy was estimated as ~0.17 and the activation energy were intermediate between the values for grain boundary and lattice diffusion in magnesium.

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More information

Published date: 2005
Additional Information: The Langdon Symposium: Flow and forming of Crystalline Materials
Keywords: equal-channel angular pressing, magnesium, mechanical properties, tensile testing
Organisations: Engineering Sciences

Identifiers

Local EPrints ID: 23821
URI: http://eprints.soton.ac.uk/id/eprint/23821
ISSN: 0921-5093
PURE UUID: d4ed8bbc-857e-4dc3-8788-1432966b82a7
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 21 Mar 2006
Last modified: 16 Mar 2024 03:28

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Author: Bing Q. Han

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