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Characteristics of grain refinement in oxygen-free copper processed by equal-channel angular pressing and dynamic testing

Characteristics of grain refinement in oxygen-free copper processed by equal-channel angular pressing and dynamic testing
Characteristics of grain refinement in oxygen-free copper processed by equal-channel angular pressing and dynamic testing
Oxygen-free copper was processed by equal-channel angular pressing (ECAP) at room temperature for 1, 4 and 8 passes and then the ECAP specimens were further deformed by dynamic testing at 298 K using a strain rate of 10 s−1. Experiments were conducted to investigate the influence of the initial microstructures induced by ECAP on the subsequent grain refinement and mechanical properties after dynamic testing. The results show the strength of copper increased with increasing numbers of ECAP passes and a significant additional grain refinement was produced in the ECAP specimens through the dynamic testing. Thus, the initial grain sizes after ECAP for 1, 4 and 8 passes were ~16, ~4.4 and ~2.9 μm, respectively, and these values were reduced to ~400, ~330 and ~300 nm by dynamic testing, The grains were refined by conventional dislocation processes in the 1-pass specimen but there was evidence for dynamic recrystallization in the specimen processed by 8 passes.
Copper, Dynamic testing, Equal-channel angular pressing, High strain rates, Severe plastic deformation
0921-5093
1-8
Alawadhi, Meshal Y.
98c0239a-e3ce-4cfd-b3db-c98aa3c2afbd
Sabbaghianrad, Shima
2dbc35ee-f341-42fd-9081-94ef3e9b10b0
Wang, Ying Chun
77cf014c-56e2-4569-bd19-ab2e86c4ae2c
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Alawadhi, Meshal Y.
98c0239a-e3ce-4cfd-b3db-c98aa3c2afbd
Sabbaghianrad, Shima
2dbc35ee-f341-42fd-9081-94ef3e9b10b0
Wang, Ying Chun
77cf014c-56e2-4569-bd19-ab2e86c4ae2c
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Alawadhi, Meshal Y., Sabbaghianrad, Shima, Wang, Ying Chun, Huang, Yi and Langdon, Terence G. (2020) Characteristics of grain refinement in oxygen-free copper processed by equal-channel angular pressing and dynamic testing. Materials Science and Engineering: A, 775, 1-8, [138985]. (doi:10.1016/j.msea.2020.138985).

Record type: Article

Abstract

Oxygen-free copper was processed by equal-channel angular pressing (ECAP) at room temperature for 1, 4 and 8 passes and then the ECAP specimens were further deformed by dynamic testing at 298 K using a strain rate of 10 s−1. Experiments were conducted to investigate the influence of the initial microstructures induced by ECAP on the subsequent grain refinement and mechanical properties after dynamic testing. The results show the strength of copper increased with increasing numbers of ECAP passes and a significant additional grain refinement was produced in the ECAP specimens through the dynamic testing. Thus, the initial grain sizes after ECAP for 1, 4 and 8 passes were ~16, ~4.4 and ~2.9 μm, respectively, and these values were reduced to ~400, ~330 and ~300 nm by dynamic testing, The grains were refined by conventional dislocation processes in the 1-pass specimen but there was evidence for dynamic recrystallization in the specimen processed by 8 passes.

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Meshal-dynamic-revised-TGL - Accepted Manuscript
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More information

Accepted/In Press date: 18 January 2020
e-pub ahead of print date: 21 January 2020
Published date: 21 February 2020
Keywords: Copper, Dynamic testing, Equal-channel angular pressing, High strain rates, Severe plastic deformation

Identifiers

Local EPrints ID: 438180
URI: http://eprints.soton.ac.uk/id/eprint/438180
ISSN: 0921-5093
PURE UUID: bc24d37d-80f7-404f-9408-1547c7ca9612
ORCID for Yi Huang: ORCID iD orcid.org/0000-0001-9259-8123
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 03 Mar 2020 17:47
Last modified: 26 Nov 2021 05:16

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Contributors

Author: Meshal Y. Alawadhi
Author: Shima Sabbaghianrad
Author: Ying Chun Wang
Author: Yi Huang ORCID iD

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