Achieving homogeneity in a two-phase Cu–Ag composite during high-pressure torsion
Achieving homogeneity in a two-phase Cu–Ag composite during high-pressure torsion
A Cu–8 wt%Ag alloy was processed at room temperature either by high-pressure torsion (HPT) or using a two-step deformation mode of equal-channel angular pressing (ECAP) and HPT. After HPT deformation, different flow patterns were observed on the disk surface without any post-deformation treatment thereby indicating an inhomogeneous shearing deformation. The microhardness distributions throughout the disks were compared after the two different processing routes. It is shown that the microhardness remains very low near the center of the disk although saturated in the outer regions after 10 revolutions. By contrast, an intrinsically homogeneous microhardness may be attained throughout the disk after the two-step deformation of ECAP and HPT. This study suggests a convenient procedure for achieving full homogeneity in high-strength materials during HPT processing.
4606-4612
Tian, Y.Z.
bda43954-296b-4f4e-8a9d-b35894da6b3e
Zhang, Z.F.
32ae683a-dc37-4bb4-89b3-ecf266a4c4c9
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
July 2013
Tian, Y.Z.
bda43954-296b-4f4e-8a9d-b35894da6b3e
Zhang, Z.F.
32ae683a-dc37-4bb4-89b3-ecf266a4c4c9
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Tian, Y.Z., Zhang, Z.F. and Langdon, T.G.
(2013)
Achieving homogeneity in a two-phase Cu–Ag composite during high-pressure torsion.
Journal of Materials Science, 48 (13), .
(doi:10.1007/s10853-012-7105-8).
Abstract
A Cu–8 wt%Ag alloy was processed at room temperature either by high-pressure torsion (HPT) or using a two-step deformation mode of equal-channel angular pressing (ECAP) and HPT. After HPT deformation, different flow patterns were observed on the disk surface without any post-deformation treatment thereby indicating an inhomogeneous shearing deformation. The microhardness distributions throughout the disks were compared after the two different processing routes. It is shown that the microhardness remains very low near the center of the disk although saturated in the outer regions after 10 revolutions. By contrast, an intrinsically homogeneous microhardness may be attained throughout the disk after the two-step deformation of ECAP and HPT. This study suggests a convenient procedure for achieving full homogeneity in high-strength materials during HPT processing.
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Published date: July 2013
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 351984
URI: http://eprints.soton.ac.uk/id/eprint/351984
ISSN: 0022-2461
PURE UUID: 2784d11b-26cc-4370-962e-5c2af34da2bb
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Date deposited: 01 May 2013 08:53
Last modified: 15 Mar 2024 03:13
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Author:
Y.Z. Tian
Author:
Z.F. Zhang
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