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Evidence for an early softening behavior in pure copper processed by high-pressure torsion

Evidence for an early softening behavior in pure copper processed by high-pressure torsion
Evidence for an early softening behavior in pure copper processed by high-pressure torsion
Pure copper of 99.99 % purity was processed by high-pressure torsion under a pressure of 6.0 GPa at room temperature through various numbers of turns from 1/4 to 10. Microhardness measurements show that the hardness initially increases to a maximum value at a strain of ~5.6, decreases to a strain of ~8.4, and then increases slowly to a saturation condition at strains at and above ~80. These data are interpreted in terms of the advent of dynamic recrystallization. The results have similarities and differences to the softening with recovery that is well established in high-purity aluminum.
hpt processing, initial annealed condition, von mise strain, hardness homogeneity, saturation hardness, equivalent strain, hpt disk, dynamic recrystallization, large cylinder, minor strain, twin boundary, hardness evolution, al alloy, edge region
0022-2461
1923-1930
Xu, Jie
593871b5-a17a-4e0f-ae0e-7e48b1aadd99
Li, Jianwei
299f1c63-8058-414b-afd1-c5c9a6a13762
Wang, Chuan Ting
80ad9adf-a9df-49ed-934d-fa64505b920d
Shan, Debin
fd8652eb-1eeb-4ae2-bcc4-102320f3c2d7
Guo, Bin
6454155d-fa5f-480b-8747-88d06498a923
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Xu, Jie
593871b5-a17a-4e0f-ae0e-7e48b1aadd99
Li, Jianwei
299f1c63-8058-414b-afd1-c5c9a6a13762
Wang, Chuan Ting
80ad9adf-a9df-49ed-934d-fa64505b920d
Shan, Debin
fd8652eb-1eeb-4ae2-bcc4-102320f3c2d7
Guo, Bin
6454155d-fa5f-480b-8747-88d06498a923
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Xu, Jie, Li, Jianwei, Wang, Chuan Ting, Shan, Debin, Guo, Bin and Langdon, Terence G. (2016) Evidence for an early softening behavior in pure copper processed by high-pressure torsion. Journal of Materials Science, 51 (4), 1923-1930. (doi:10.1007/s10853-015-9499-6).

Record type: Article

Abstract

Pure copper of 99.99 % purity was processed by high-pressure torsion under a pressure of 6.0 GPa at room temperature through various numbers of turns from 1/4 to 10. Microhardness measurements show that the hardness initially increases to a maximum value at a strain of ~5.6, decreases to a strain of ~8.4, and then increases slowly to a saturation condition at strains at and above ~80. These data are interpreted in terms of the advent of dynamic recrystallization. The results have similarities and differences to the softening with recovery that is well established in high-purity aluminum.

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More information

Accepted/In Press date: 12 October 2015
e-pub ahead of print date: 5 November 2015
Published date: February 2016
Keywords: hpt processing, initial annealed condition, von mise strain, hardness homogeneity, saturation hardness, equivalent strain, hpt disk, dynamic recrystallization, large cylinder, minor strain, twin boundary, hardness evolution, al alloy, edge region
Organisations: Engineering Mats & Surface Engineerg Gp, Engineering Science Unit, Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 388012
URI: http://eprints.soton.ac.uk/id/eprint/388012
ISSN: 0022-2461
PURE UUID: cca067d8-23ed-485d-91d0-f814242d7553
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 17 Feb 2016 15:23
Last modified: 17 Dec 2019 01:50

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