Formation of nanocrystalline grain structure in an Mg-Gd-Y-Zr alloy processed by high-pressure torsion
Formation of nanocrystalline grain structure in an Mg-Gd-Y-Zr alloy processed by high-pressure torsion
In this paper, the microstructural and hardness evolutions of an Mg-5.91Gd3.29Y-0.54Zr (wt.%) alloy during high-pressure torsion (HPT) were investigated.Deformation twinning played a crucial role in the HPT-induced grain subdivisionprocess. In the 1/8-revolution disk, {101̅1} and {101̅2} twins with different twin variants, {101̅1} − {101̅2} secondary twins and twin-twin interactions were activated.Primary twins prevailed at the very central region of the disk, while much finer multiple twins were formed at the edge region of the disk corresponding to the area subjected to a relatively large plastic strain. Besides, dislocation cell substructures were also developed. Nanocrystalline structure was attained after 5-revolution HPT processing, and the maximum hardness reached ~120 Hv at the edge region of the disk, which is much higher than that achieved from other traditional plastic deformation methods.
Ren, Xinyu
a2c75196-75f0-4a32-8457-d65cb145411e
An, Xinglong
22caaeec-a2a8-4ed0-8c87-4224d010e59a
Ni, Song
84c6cbce-a7fa-4849-b3f8-c0ddf7b8cc93
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Song, Min
797511ac-9b93-4215-9c59-7d4daa9aedb3
11 July 2022
Ren, Xinyu
a2c75196-75f0-4a32-8457-d65cb145411e
An, Xinglong
22caaeec-a2a8-4ed0-8c87-4224d010e59a
Ni, Song
84c6cbce-a7fa-4849-b3f8-c0ddf7b8cc93
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Song, Min
797511ac-9b93-4215-9c59-7d4daa9aedb3
Ren, Xinyu, An, Xinglong, Ni, Song, Huang, Yi and Song, Min
(2022)
Formation of nanocrystalline grain structure in an Mg-Gd-Y-Zr alloy processed by high-pressure torsion.
Materials Characterization, 191, [112088].
(doi:10.1016/j.matchar.2022.112088).
Abstract
In this paper, the microstructural and hardness evolutions of an Mg-5.91Gd3.29Y-0.54Zr (wt.%) alloy during high-pressure torsion (HPT) were investigated.Deformation twinning played a crucial role in the HPT-induced grain subdivisionprocess. In the 1/8-revolution disk, {101̅1} and {101̅2} twins with different twin variants, {101̅1} − {101̅2} secondary twins and twin-twin interactions were activated.Primary twins prevailed at the very central region of the disk, while much finer multiple twins were formed at the edge region of the disk corresponding to the area subjected to a relatively large plastic strain. Besides, dislocation cell substructures were also developed. Nanocrystalline structure was attained after 5-revolution HPT processing, and the maximum hardness reached ~120 Hv at the edge region of the disk, which is much higher than that achieved from other traditional plastic deformation methods.
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Accepted/In Press date: 27 June 2022
e-pub ahead of print date: 30 June 2022
Published date: 11 July 2022
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Local EPrints ID: 482996
URI: http://eprints.soton.ac.uk/id/eprint/482996
ISSN: 1044-5803
PURE UUID: dc1f95dd-8ec8-4c1b-ad23-3385b6041c93
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Date deposited: 18 Oct 2023 16:43
Last modified: 17 Mar 2024 03:25
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Author:
Xinyu Ren
Author:
Xinglong An
Author:
Song Ni
Author:
Yi Huang
Author:
Min Song
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