An evaluation of the saturation hardness in an ultrafine-grained aluminum 7075 alloy processed using different techniques
An evaluation of the saturation hardness in an ultrafine-grained aluminum 7075 alloy processed using different techniques
A commercial Al-7075 alloy was processed by the severe plastic deformation (SPD) procedures of equal-channel angular pressing (ECAP) and high-pressure torsion (HPT) and by a combination of these two techniques. The results show samples processed by a combination of ECAP and HPT have smaller grain sizes and higher saturation hardnesses than samples processed separately by ECAP or HPT. Microstructural observations reveal grain refinement after each SPD technique, and the minimum grain size was ~200 nm after processing by a combination of ECAP for eight passes and HPT for 20 turns. It is demonstrated that the saturation hardness is dependent upon the microstructure of the sample introduced in any processing step prior to the HPT processing.
4357-4365
Sabbaghianrad, Shima
2dbc35ee-f341-42fd-9081-94ef3e9b10b0
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2 April 2015
Sabbaghianrad, Shima
2dbc35ee-f341-42fd-9081-94ef3e9b10b0
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Sabbaghianrad, Shima and Langdon, Terence G.
(2015)
An evaluation of the saturation hardness in an ultrafine-grained aluminum 7075 alloy processed using different techniques.
Journal of Materials Science, 50 (12), .
(doi:10.1007/s10853-015-8989-x).
Abstract
A commercial Al-7075 alloy was processed by the severe plastic deformation (SPD) procedures of equal-channel angular pressing (ECAP) and high-pressure torsion (HPT) and by a combination of these two techniques. The results show samples processed by a combination of ECAP and HPT have smaller grain sizes and higher saturation hardnesses than samples processed separately by ECAP or HPT. Microstructural observations reveal grain refinement after each SPD technique, and the minimum grain size was ~200 nm after processing by a combination of ECAP for eight passes and HPT for 20 turns. It is demonstrated that the saturation hardness is dependent upon the microstructure of the sample introduced in any processing step prior to the HPT processing.
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Published date: 2 April 2015
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 377268
URI: http://eprints.soton.ac.uk/id/eprint/377268
ISSN: 0022-2461
PURE UUID: 43972265-a8e9-4b51-a74e-91e66e569d67
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Date deposited: 20 May 2015 15:26
Last modified: 15 Mar 2024 03:14
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Author:
Shima Sabbaghianrad
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