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Investigation of microstructure and texture evolution in an AZ31/Mg-Gd alloy hybrid metal fabricated by high-pressure torsion

Investigation of microstructure and texture evolution in an AZ31/Mg-Gd alloy hybrid metal fabricated by high-pressure torsion
Investigation of microstructure and texture evolution in an AZ31/Mg-Gd alloy hybrid metal fabricated by high-pressure torsion

High-pressure torsion (HPT) processing is successfully applied to fabricate a novel hybrid material from separate discs of AZ31 (Mg–3Al–1Zn, wt%) and Mg–0.6Gd (wt%) alloys by straining through numbers of rotations, N, of 1/4, 1/2, 5, 10, and 20 turns at room temperature. The microstructure and texture are investigated near the bonding interface through the disc diameter using electron backscatter diffraction (EBSD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The microstructure exhibits two grain refinement regimes with the first occurring during an equivalent strain range, ε eq, of ≈0.3–72 and the second during ε eq from ≈72 to 517. The general texture changes from B-fiber to Y-fiber and C 2-fiber through the HPT processing. The resultant microstructures and textures of this hybrid alloy are examined separately for the AZ31 and Mg-0.6Gd alloys and found controlled by the presence of twinning, slip systems, and second phases and the occurrence of different dynamic recrystallization mechanisms.

high-pressure torsion, hybrid metal, magnesium, microstructure, rare-earth, texture
1438-1656
Ould Mohamed, Ouarda
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Azzeddine, Hiba
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Huang, Yi
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Baudin, Thierry
448e215d-c156-4c0a-9a3a-04078a7174b8
Bazarnik, Piotr
844b4a15-226a-4275-9cee-812669fa033c
Brisset, Francois
b9f69e75-4055-44be-8b62-497b12873d51
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Ould Mohamed, Ouarda
6f592835-5ba6-4160-a9a7-0e395e0521f5
Azzeddine, Hiba
a9bb5955-be91-4ce8-971c-60ab5573a1a9
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Baudin, Thierry
448e215d-c156-4c0a-9a3a-04078a7174b8
Bazarnik, Piotr
844b4a15-226a-4275-9cee-812669fa033c
Brisset, Francois
b9f69e75-4055-44be-8b62-497b12873d51
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Ould Mohamed, Ouarda, Azzeddine, Hiba, Huang, Yi, Baudin, Thierry, Bazarnik, Piotr, Brisset, Francois, Kawasaki, Megumi and Langdon, Terence G. (2023) Investigation of microstructure and texture evolution in an AZ31/Mg-Gd alloy hybrid metal fabricated by high-pressure torsion. Advanced Engineering Materials, 25 (11), [2201794]. (doi:10.1002/adem.202201794).

Record type: Article

Abstract

High-pressure torsion (HPT) processing is successfully applied to fabricate a novel hybrid material from separate discs of AZ31 (Mg–3Al–1Zn, wt%) and Mg–0.6Gd (wt%) alloys by straining through numbers of rotations, N, of 1/4, 1/2, 5, 10, and 20 turns at room temperature. The microstructure and texture are investigated near the bonding interface through the disc diameter using electron backscatter diffraction (EBSD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The microstructure exhibits two grain refinement regimes with the first occurring during an equivalent strain range, ε eq, of ≈0.3–72 and the second during ε eq from ≈72 to 517. The general texture changes from B-fiber to Y-fiber and C 2-fiber through the HPT processing. The resultant microstructures and textures of this hybrid alloy are examined separately for the AZ31 and Mg-0.6Gd alloys and found controlled by the presence of twinning, slip systems, and second phases and the occurrence of different dynamic recrystallization mechanisms.

Text
Hiba-Hybrid-HPT _manuscript - revised-final - Accepted Manuscript
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e-pub ahead of print date: 26 January 2023
Published date: June 2023
Additional Information: Funding Information: Dr‐Ing. N. Hort and Dr. D. Letzig (MagIC, Germany) and Dr‐Ing. Talal Al‐Samman (RWTH‐Aachen University, Germany) are gratefully acknowledged for providing the AZ31 and Mg‐0.6Gd alloys, respectively. Two of the authors were supported by the European Research Council under Grant Agreement No. 267464‐SPDMETALS (YH and TGL). Publisher Copyright: © 2023 Wiley-VCH GmbH.
Keywords: high-pressure torsion, hybrid metal, magnesium, microstructure, rare-earth, texture

Identifiers

Local EPrints ID: 483019
URI: http://eprints.soton.ac.uk/id/eprint/483019
ISSN: 1438-1656
PURE UUID: efaeab6c-7773-450d-b032-5fb0c8228240
ORCID for Yi Huang: ORCID iD orcid.org/0000-0001-9259-8123
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 19 Oct 2023 16:49
Last modified: 06 Jun 2024 04:10

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Contributors

Author: Ouarda Ould Mohamed
Author: Hiba Azzeddine
Author: Yi Huang ORCID iD
Author: Thierry Baudin
Author: Piotr Bazarnik
Author: Francois Brisset
Author: Megumi Kawasaki

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