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The fabrication of high strength Zr/Nb nanocomposites using high-pressure torsion

The fabrication of high strength Zr/Nb nanocomposites using high-pressure torsion
The fabrication of high strength Zr/Nb nanocomposites using high-pressure torsion
Nanocomposites of Zr/Nb with exceptionally high hardness were fabricated successfully through the high-pressure torsion (HPT) processing of prepacked Nb/Zr/Nb sandwich samples at ambient temperature. The initial layers of Nb and Zr became fragmented during HPT processing with the formation of many fine-scale intermixed Zr/Nb layers. The intermixing of these Zr/Nb layers increased both with increasing HPT revolutions from 10 to 100 and with increasing radial positions on the disks. The Vickers microhardness, Hv, increased with increasing revolutions and with radial position reaching a maximum of ~700 Hv at the edge of the 100 turns sample. Exceptional grain refinement to the range of ~20 to 40 nm and the occurrence of twinning were associated with the HPT-processed Zr/Nb composites after 100 turns. These results suggest a potential route for fabricating high strength bulk Zr/Nb nanocomposites.
Zr/Nb nanocomposites, hardness, high-pressure torsion, nanostructures, ultrafine grains
Luo, Dan
06b03d76-d955-4b01-b65f-5ab7664b51d2
Huminiuc, Teodor
b743b7ba-7541-4f2e-b4be-ea25b088e4c6
Huang, Yi
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Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Luo, Dan
06b03d76-d955-4b01-b65f-5ab7664b51d2
Huminiuc, Teodor
b743b7ba-7541-4f2e-b4be-ea25b088e4c6
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Luo, Dan, Huminiuc, Teodor, Huang, Yi, Polcar, Tomas and Langdon, Terence G (2020) The fabrication of high strength Zr/Nb nanocomposites using high-pressure torsion. Materials Science & Engineering: A, 740, [139693]. (doi:10.1016/j.msea.2020.139693).

Record type: Article

Abstract

Nanocomposites of Zr/Nb with exceptionally high hardness were fabricated successfully through the high-pressure torsion (HPT) processing of prepacked Nb/Zr/Nb sandwich samples at ambient temperature. The initial layers of Nb and Zr became fragmented during HPT processing with the formation of many fine-scale intermixed Zr/Nb layers. The intermixing of these Zr/Nb layers increased both with increasing HPT revolutions from 10 to 100 and with increasing radial positions on the disks. The Vickers microhardness, Hv, increased with increasing revolutions and with radial position reaching a maximum of ~700 Hv at the edge of the 100 turns sample. Exceptional grain refinement to the range of ~20 to 40 nm and the occurrence of twinning were associated with the HPT-processed Zr/Nb composites after 100 turns. These results suggest a potential route for fabricating high strength bulk Zr/Nb nanocomposites.

Text
DanLuo-Revised Manuscript-TGL - Accepted Manuscript
Restricted to Repository staff only until 31 May 2022.
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More information

Accepted/In Press date: 31 May 2020
e-pub ahead of print date: 5 June 2020
Published date: 14 July 2020
Keywords: Zr/Nb nanocomposites, hardness, high-pressure torsion, nanostructures, ultrafine grains

Identifiers

Local EPrints ID: 441849
URI: http://eprints.soton.ac.uk/id/eprint/441849
PURE UUID: d11f162c-2869-476e-b0dc-368ceb940d21
ORCID for Yi Huang: ORCID iD orcid.org/0000-0001-9259-8123
ORCID for Tomas Polcar: ORCID iD orcid.org/0000-0002-0863-6287
ORCID for Terence G Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 30 Jun 2020 16:30
Last modified: 26 Nov 2021 02:57

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Contributors

Author: Dan Luo
Author: Teodor Huminiuc
Author: Yi Huang ORCID iD
Author: Tomas Polcar ORCID iD

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