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On the relation between the microstructure and the mechanical behavior of pure Zn processed by high pressure torsion

On the relation between the microstructure and the mechanical behavior of pure Zn processed by high pressure torsion
On the relation between the microstructure and the mechanical behavior of pure Zn processed by high pressure torsion
Pure Zn was processed by high pressure torsion (HPT) at room temperature in order to evaluate the effect of this severe plastic deformation (SPD) technique on materials processed at high homologous temperatures. HPT leads to the development of coarse grains with orientations belonging to a basal fiber by discontinuous dynamic recrystallization (DDRX). The strength of the texture increases dramatically with the applied shear strain in such a way that, after 5 turns, the volume fraction of oriented material is 85%. The samples processed to large strains possess high yield strength along the in-plane directions due to the reduced activity of basal slip and the operation of non-basal systems. The microhardness values nevertheless remain similar to those of the annealed material up to equivalent strains of 50 and then they decrease gradually with increasing strain due to grain growth. The microstructural development of pure Zn after HPT is critically influenced by the initial microstructure, as well as by the temperature increase during processing which is highly dependent on the rotational speed of the anvils
0921-5093
196-202
Srinivasarao, B.
4a5b8904-17c3-47d7-9429-73768b84b578
Zhilyaev, A.P.
d053e518-1976-4633-8953-e8f34b9b7c44
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Pérez-Prado, M.T.
41ed62a7-188a-4cb8-94cd-9e5e7495337e
Srinivasarao, B.
4a5b8904-17c3-47d7-9429-73768b84b578
Zhilyaev, A.P.
d053e518-1976-4633-8953-e8f34b9b7c44
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Pérez-Prado, M.T.
41ed62a7-188a-4cb8-94cd-9e5e7495337e

Srinivasarao, B., Zhilyaev, A.P., Langdon, T.G. and Pérez-Prado, M.T. (2013) On the relation between the microstructure and the mechanical behavior of pure Zn processed by high pressure torsion. Materials Science and Engineering: A, 562, 196-202. (doi:10.1016/j.msea.2012.11.027).

Record type: Article

Abstract

Pure Zn was processed by high pressure torsion (HPT) at room temperature in order to evaluate the effect of this severe plastic deformation (SPD) technique on materials processed at high homologous temperatures. HPT leads to the development of coarse grains with orientations belonging to a basal fiber by discontinuous dynamic recrystallization (DDRX). The strength of the texture increases dramatically with the applied shear strain in such a way that, after 5 turns, the volume fraction of oriented material is 85%. The samples processed to large strains possess high yield strength along the in-plane directions due to the reduced activity of basal slip and the operation of non-basal systems. The microhardness values nevertheless remain similar to those of the annealed material up to equivalent strains of 50 and then they decrease gradually with increasing strain due to grain growth. The microstructural development of pure Zn after HPT is critically influenced by the initial microstructure, as well as by the temperature increase during processing which is highly dependent on the rotational speed of the anvils

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Published date: 1 February 2013
Organisations: Engineering Mats & Surface Engineerg Gp

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Local EPrints ID: 347092
URI: http://eprints.soton.ac.uk/id/eprint/347092
ISSN: 0921-5093
PURE UUID: 521e2fa5-e5ff-4900-9168-2cb077c971e5
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

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Date deposited: 17 Jan 2013 11:24
Last modified: 15 Mar 2024 03:13

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Contributors

Author: B. Srinivasarao
Author: A.P. Zhilyaev
Author: T.G. Langdon ORCID iD
Author: M.T. Pérez-Prado

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