An investigation of the limits of grain refinement after processing by a combination of severe plastic deformation techniques: a comparison of Al and Mg alloys
An investigation of the limits of grain refinement after processing by a combination of severe plastic deformation techniques: a comparison of Al and Mg alloys
An Al-7075 aluminum alloy and a ZK60 magnesium alloy were processed by a
combination of equal-channel angular pressing (ECAP) for 4 passes and high-pressure torsion (HPT) through total numbers of up to 20 turns. Processing by ECAP and HPT were performed at 473 K and room temperature, respectively. Mechanical testing showed an increase in the hardness value of the Al-7075 alloy after a combination of ECAP and HPT whereas in the ZK60 alloy the hardness was reduced. Microstructural images of the Al-7075 alloy revealed very
significant grain refinement after a combination of ECAP + HPT compared to the individual processing techniques. By contrast, and consistent with the hardness measurements, the average grain size of the ZK60 alloy was larger after processing by the two-step SPD technique. These results are examined and an explanation is presented based on the available microstructural evidence.
373-379
Sabbaghianrad, Shima
2dbc35ee-f341-42fd-9081-94ef3e9b10b0
Torbati-Sarraf, Seyed A.
21270cac-1afd-450f-abbe-3687f9b0726a
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
17 January 2018
Sabbaghianrad, Shima
2dbc35ee-f341-42fd-9081-94ef3e9b10b0
Torbati-Sarraf, Seyed A.
21270cac-1afd-450f-abbe-3687f9b0726a
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Sabbaghianrad, Shima, Torbati-Sarraf, Seyed A. and Langdon, Terence G.
(2018)
An investigation of the limits of grain refinement after processing by a combination of severe plastic deformation techniques: a comparison of Al and Mg alloys.
Materials Science and Engineering: A, 712, .
(doi:10.1016/j.msea.2017.11.090).
Abstract
An Al-7075 aluminum alloy and a ZK60 magnesium alloy were processed by a
combination of equal-channel angular pressing (ECAP) for 4 passes and high-pressure torsion (HPT) through total numbers of up to 20 turns. Processing by ECAP and HPT were performed at 473 K and room temperature, respectively. Mechanical testing showed an increase in the hardness value of the Al-7075 alloy after a combination of ECAP and HPT whereas in the ZK60 alloy the hardness was reduced. Microstructural images of the Al-7075 alloy revealed very
significant grain refinement after a combination of ECAP + HPT compared to the individual processing techniques. By contrast, and consistent with the hardness measurements, the average grain size of the ZK60 alloy was larger after processing by the two-step SPD technique. These results are examined and an explanation is presented based on the available microstructural evidence.
Text
Shima-MSEA-November2017
- Accepted Manuscript
More information
Accepted/In Press date: 21 November 2017
e-pub ahead of print date: 2 December 2017
Published date: 17 January 2018
Identifiers
Local EPrints ID: 415911
URI: http://eprints.soton.ac.uk/id/eprint/415911
ISSN: 0921-5093
PURE UUID: c8506ff2-870d-45d6-acc0-24f284a076c0
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Date deposited: 28 Nov 2017 17:30
Last modified: 16 Mar 2024 05:57
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Author:
Shima Sabbaghianrad
Author:
Seyed A. Torbati-Sarraf
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