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Microstructural and hardness evolution of additively manufactured Al–Si–Cu alloy processed by high-pressure torsion

Microstructural and hardness evolution of additively manufactured Al–Si–Cu alloy processed by high-pressure torsion
Microstructural and hardness evolution of additively manufactured Al–Si–Cu alloy processed by high-pressure torsion
Nanostructured Al-9%Si-3%Cu alloy was achieved by direct metal laser sintering (DMLS) and then processed using high-pressure torsion (HPT) processing, which resulted in considerable grain refinement down to 60 nm associated with a substantial dislocation density up 6.2×1014m-2 and a significant reduction in the porosity. Hardness measurements across the horizontal and vertical cross-sections showed an improvement in the strength homogeneity for processed samples after 10 turns of HPT processing. These results indicate that a controllable ultrafinegrained microstructure can be achieved by employing additive manufacturing, followed by effective severe plastic deformation processing.
0025-5416
8956 -8977
Al–Zubaydi, Ahmed S.J.
d59e9818-6c38-4a94-9c5a-e40f9b875862
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Wang, Shuncai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Al–Zubaydi, Ahmed S.J.
d59e9818-6c38-4a94-9c5a-e40f9b875862
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Wang, Shuncai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17

Al–Zubaydi, Ahmed S.J., Gao, Nong, Wang, Shuncai and Reed, Philippa (2022) Microstructural and hardness evolution of additively manufactured Al–Si–Cu alloy processed by high-pressure torsion. Materials Science and Engineering, 57, 8956 -8977. (doi:10.1007/s10853-022-07234-4).

Record type: Article

Abstract

Nanostructured Al-9%Si-3%Cu alloy was achieved by direct metal laser sintering (DMLS) and then processed using high-pressure torsion (HPT) processing, which resulted in considerable grain refinement down to 60 nm associated with a substantial dislocation density up 6.2×1014m-2 and a significant reduction in the porosity. Hardness measurements across the horizontal and vertical cross-sections showed an improvement in the strength homogeneity for processed samples after 10 turns of HPT processing. These results indicate that a controllable ultrafinegrained microstructure can be achieved by employing additive manufacturing, followed by effective severe plastic deformation processing.

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3-ASJ Al-Zubaydi Journal of Mat letters 1-2 2022
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Accepted/In Press date: 13 April 2022
Published date: 6 May 2022

Identifiers

Local EPrints ID: 468344
URI: http://eprints.soton.ac.uk/id/eprint/468344
ISSN: 0025-5416
PURE UUID: f0d8d6f4-e447-4945-be2f-3bdff32f26ec
ORCID for Nong Gao: ORCID iD orcid.org/0000-0002-7430-0319
ORCID for Philippa Reed: ORCID iD orcid.org/0000-0002-2258-0347

Catalogue record

Date deposited: 10 Aug 2022 18:15
Last modified: 11 Aug 2022 01:38

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Contributors

Author: Ahmed S.J. Al–Zubaydi
Author: Nong Gao ORCID iD
Author: Shuncai Wang
Author: Philippa Reed ORCID iD

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