Synthesis of a bulk nanostructured metastable Al alloy with extreme supersaturation of Mg
Synthesis of a bulk nanostructured metastable Al alloy with extreme supersaturation of Mg
Nanostructuring of bulk metals is now well documented with the development of severe plastic deformation (SPD) for improving the physical and mechanical properties of engineering materials. Processing by high-pressure torsion (HPT), which was developed initially as a grain refinement technique, was extended recently to the mechanical bonding of dissimilar metals during nanostrcturing which generally involves significant microstructural heterogeneity. Here we introduce, for the first time, a bulk metastable Al-Mg supersaturated solid solution by the diffusion bonding of separate Al and Mg metal solids at room temperature using HPT. Exceptional hardness was achieved homogeneously throughout the metastable alloy with a record maximum supersaturated Mg content of ~38.5 at.% in the Al matrix having a grain size of ~35-40 nm. Our results demonstrate the synthesis of a bulk nanocrystalline metastable alloy with good microstructural stability at room temperature where such bulk solids are not yet reported for mechanical alloying by powder metallurgy.
synthesis, bulk nanostructured metals and alloys, metastable, Al alloy, extreme supersaturation, Mg
1-7
Han, Jae-Kyung
226cace6-ffa5-49a4-a5af-7b6620adbf9f
Liss, Klaus-Dieter
436269cc-551c-4ef2-bed6-1a8b78a94545
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
2019
Han, Jae-Kyung
226cace6-ffa5-49a4-a5af-7b6620adbf9f
Liss, Klaus-Dieter
436269cc-551c-4ef2-bed6-1a8b78a94545
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Han, Jae-Kyung, Liss, Klaus-Dieter, Langdon, Terence G. and Kawasaki, Megumi
(2019)
Synthesis of a bulk nanostructured metastable Al alloy with extreme supersaturation of Mg.
Scientific Reports, 9, , [17186].
(doi:10.1038/s41598-019-53614-3).
Abstract
Nanostructuring of bulk metals is now well documented with the development of severe plastic deformation (SPD) for improving the physical and mechanical properties of engineering materials. Processing by high-pressure torsion (HPT), which was developed initially as a grain refinement technique, was extended recently to the mechanical bonding of dissimilar metals during nanostrcturing which generally involves significant microstructural heterogeneity. Here we introduce, for the first time, a bulk metastable Al-Mg supersaturated solid solution by the diffusion bonding of separate Al and Mg metal solids at room temperature using HPT. Exceptional hardness was achieved homogeneously throughout the metastable alloy with a record maximum supersaturated Mg content of ~38.5 at.% in the Al matrix having a grain size of ~35-40 nm. Our results demonstrate the synthesis of a bulk nanocrystalline metastable alloy with good microstructural stability at room temperature where such bulk solids are not yet reported for mechanical alloying by powder metallurgy.
Text
MK-SciReprts-2019
- Author's Original
Text
s41598-019-53614-3
- Version of Record
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Accepted/In Press date: 4 November 2019
e-pub ahead of print date: 20 November 2019
Published date: 2019
Keywords:
synthesis, bulk nanostructured metals and alloys, metastable, Al alloy, extreme supersaturation, Mg
Identifiers
Local EPrints ID: 435778
URI: http://eprints.soton.ac.uk/id/eprint/435778
ISSN: 2045-2322
PURE UUID: 90262da7-2c06-44c6-af50-9e0a51093981
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Date deposited: 20 Nov 2019 17:30
Last modified: 17 Mar 2024 02:55
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Author:
Jae-Kyung Han
Author:
Klaus-Dieter Liss
Author:
Megumi Kawasaki
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