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Influence of Zn content on the microstructure and mechanical performance of ultrafine-grained Al-Zn alloys processed by high-pressure torsion

Influence of Zn content on the microstructure and mechanical performance of ultrafine-grained Al-Zn alloys processed by high-pressure torsion
Influence of Zn content on the microstructure and mechanical performance of ultrafine-grained Al-Zn alloys processed by high-pressure torsion
Al-Zn alloys were processed by high-pressure torsion (HPT) to produce ultrafine-grained (UFG) materials. For low Zn contents, HPT gave strengthening due to grain refinement while for the highest Zn concentration the decomposition of the microstructure yielded an abnormal softening at room temperature. The microstructure decomposition led also to the formation of a Zn-rich phase which wet the Al/Al grain boundaries and enhanced the role of grain boundary sliding with unusually high strain rate sensitivity. The occurrence of intensive sliding in these UFG alloys is demonstrated by deforming micro-pillars.
0167-577X
334-337
Chinh, Nguyen Q.
8e075269-61a9-469c-8f71-3d52eb37dadc
Jenei, Péter
19304e34-fb5d-486e-bccc-10fcfab1b814
Gubicza, Jenő
046ca28c-f226-40bc-a510-9f1bc0a3a29d
Bobruk, Elena V.
adb622ca-9baa-4745-b625-3ddfddc0aa0f
Valiev, Ruslan Z.
ede7fb12-54a3-4d6f-a1a7-f04cc6549934
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Chinh, Nguyen Q.
8e075269-61a9-469c-8f71-3d52eb37dadc
Jenei, Péter
19304e34-fb5d-486e-bccc-10fcfab1b814
Gubicza, Jenő
046ca28c-f226-40bc-a510-9f1bc0a3a29d
Bobruk, Elena V.
adb622ca-9baa-4745-b625-3ddfddc0aa0f
Valiev, Ruslan Z.
ede7fb12-54a3-4d6f-a1a7-f04cc6549934
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Chinh, Nguyen Q., Jenei, Péter, Gubicza, Jenő, Bobruk, Elena V., Valiev, Ruslan Z. and Langdon, Terence G. (2017) Influence of Zn content on the microstructure and mechanical performance of ultrafine-grained Al-Zn alloys processed by high-pressure torsion. Materials Letters, 186, 334-337. (doi:10.1016/j.matlet.2016.09.114).

Record type: Article

Abstract

Al-Zn alloys were processed by high-pressure torsion (HPT) to produce ultrafine-grained (UFG) materials. For low Zn contents, HPT gave strengthening due to grain refinement while for the highest Zn concentration the decomposition of the microstructure yielded an abnormal softening at room temperature. The microstructure decomposition led also to the formation of a Zn-rich phase which wet the Al/Al grain boundaries and enhanced the role of grain boundary sliding with unusually high strain rate sensitivity. The occurrence of intensive sliding in these UFG alloys is demonstrated by deforming micro-pillars.

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Accepted/In Press date: 26 September 2016
e-pub ahead of print date: 29 September 2016
Published date: 1 January 2017
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 400943
URI: http://eprints.soton.ac.uk/id/eprint/400943
ISSN: 0167-577X
PURE UUID: e31ffb95-464a-44c3-8e6a-be55dbe084ff
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 30 Sep 2016 09:22
Last modified: 17 Dec 2019 06:37

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Contributors

Author: Nguyen Q. Chinh
Author: Péter Jenei
Author: Jenő Gubicza
Author: Elena V. Bobruk
Author: Ruslan Z. Valiev

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