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Microstructure and mechanical properties of a Zn-0.5Cu alloy processed by high-pressure torsion

Microstructure and mechanical properties of a Zn-0.5Cu alloy processed by high-pressure torsion
Microstructure and mechanical properties of a Zn-0.5Cu alloy processed by high-pressure torsion
The microstructure, texture and mechanical properties of a quasi-single-phase Zn-0.5Cu (wt. %) alloy processed by high-pressure torsion (HPT) for up to 10 turns were investigated using electron backscatter diffraction (EBSD), Vickers hardness measurements and uniaxial tensile tests. The results show that during torsional straining there is dynamic recrystallization, subgrain refinement, a dissolution of ε – Zn4Cu precipitates and solid-solution strengthening. Monotonic deformation develops a strong {0001}〈112ത0〉 local texture instead of the characteristic basal fiber texture. Sharp texture and misorientation angles for all grain boundaries of < 30° causes significantly higher yield stress and ultimate tensile stress compared to processing of the alloy by equal-channel angular pressing.
grain refinement, high-pressure torsion, HPT, severe plastic deformation, ultrafine grains, zinc alloys
0921-5093
1-9
Bednarczyk, Wiktor
fcff0fa3-5e50-4667-a096-1d5c1b1b8bab
Kawalko, Jakub
9d532997-478b-4ed4-90e8-646fba17f591
Watroba, Maria
0907548f-be5b-4611-acbb-f0a8830d79b4
Gao, Nong
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Starink, Marco
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Bala, Piotr
b2f6d414-52ac-4555-b104-400cf9603f4b
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Bednarczyk, Wiktor
fcff0fa3-5e50-4667-a096-1d5c1b1b8bab
Kawalko, Jakub
9d532997-478b-4ed4-90e8-646fba17f591
Watroba, Maria
0907548f-be5b-4611-acbb-f0a8830d79b4
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Bala, Piotr
b2f6d414-52ac-4555-b104-400cf9603f4b
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Bednarczyk, Wiktor, Kawalko, Jakub, Watroba, Maria, Gao, Nong, Starink, Marco, Bala, Piotr and Langdon, Terence G. (2020) Microstructure and mechanical properties of a Zn-0.5Cu alloy processed by high-pressure torsion. Materials Science and Engineering: A, 776, 1-9, [139047]. (doi:10.1016/j.msea.2020.139047).

Record type: Article

Abstract

The microstructure, texture and mechanical properties of a quasi-single-phase Zn-0.5Cu (wt. %) alloy processed by high-pressure torsion (HPT) for up to 10 turns were investigated using electron backscatter diffraction (EBSD), Vickers hardness measurements and uniaxial tensile tests. The results show that during torsional straining there is dynamic recrystallization, subgrain refinement, a dissolution of ε – Zn4Cu precipitates and solid-solution strengthening. Monotonic deformation develops a strong {0001}〈112ത0〉 local texture instead of the characteristic basal fiber texture. Sharp texture and misorientation angles for all grain boundaries of < 30° causes significantly higher yield stress and ultimate tensile stress compared to processing of the alloy by equal-channel angular pressing.

Text
Bednarczyk-HPT Zn-Cu - Accepted Manuscript
Restricted to Repository staff only until 2 February 2022.
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Text
Bednarczyk-MSEA-Figures - Accepted Manuscript
Restricted to Repository staff only until 2 February 2022.
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More information

Accepted/In Press date: 2 February 2020
e-pub ahead of print date: 4 February 2020
Published date: 3 March 2020
Keywords: grain refinement, high-pressure torsion, HPT, severe plastic deformation, ultrafine grains, zinc alloys

Identifiers

Local EPrints ID: 437845
URI: http://eprints.soton.ac.uk/id/eprint/437845
ISSN: 0921-5093
PURE UUID: ee61d636-aa1a-40ab-a298-d979bfcab92c
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 20 Feb 2020 17:30
Last modified: 04 Mar 2020 01:28

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