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Superior strength of tri-layered Al-Cu-Al nano-composites processed by high-pressure torsion

Superior strength of tri-layered Al-Cu-Al nano-composites processed by high-pressure torsion
Superior strength of tri-layered Al-Cu-Al nano-composites processed by high-pressure torsion

This investigation demonstrates that a solid-state reaction occurs by the application of high-pressure torsion (HPT) in the production of nanostructured multilayered hybrid Al–Cu systems. Three-layered stacks of Al/Cu/Al were subjected for up to 200 revolutions of HPT under an applied pressure of 6.0 GPa. Microstructural and mechanical properties analysis were carried out after HPT using X-ray diffraction, scanning and transmission electron microscopy, energy dispersive spectrometry (EDX), microhardness measurements and tensile tests. The SEM observations revealed the formation of a multi-nano-layered structure in the whole volume of the disks. Further investigations with the use of TEM demonstrated that each nano-layer consists of nano-grains having sizes of about 20 nm. Analysis by XRD and selected area electron diffraction (SAED) confirmed the formation of intermetallic CuAl2 and Cu9Al4 phases in the layered structures. The experiments also showed a significant improvement in microhardness (up to ∼450 Hv) and tensile properties (over 900 MPa of UTS after 200 turns) when compared to both Al-1050 and 99.95%Cu alloys in the initial state and after HPT processing. The results demonstrate that HPT offers an outstanding opportunity for producing novel nanostructured Al–Cu multilayered composites having unique mechanical properties.
Al-Cu, High-pressure torsion, Nano-composites, Phase transformations, Ultrafine grains
0925-8388
Bazarnik, Piotr
7612d50d-0cfc-43b1-a48f-f5062caacc1e
Bartkowska, Aleksandra
d5b50d44-5c46-429b-b511-da12690978ef
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Romelczyk-Baishya, B.
8b5a8510-b1c5-40ab-b004-acd001ac6074
Adamczyk-Cieslak, Boguslawa
eb9226c6-107a-4ea5-8ecf-45059da2528f
Dai, Jiaoyan
01c2e554-8d38-4062-80d2-4e9483747343
Huang, Y.
a6d20fd7-d95a-461a-81bc-ec4a714cf300
Lewandowska, Malgorzata
6625f678-258e-4ccb-a4fd-8385d56223d8
Bazarnik, Piotr
7612d50d-0cfc-43b1-a48f-f5062caacc1e
Bartkowska, Aleksandra
d5b50d44-5c46-429b-b511-da12690978ef
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Romelczyk-Baishya, B.
8b5a8510-b1c5-40ab-b004-acd001ac6074
Adamczyk-Cieslak, Boguslawa
eb9226c6-107a-4ea5-8ecf-45059da2528f
Dai, Jiaoyan
01c2e554-8d38-4062-80d2-4e9483747343
Huang, Y.
a6d20fd7-d95a-461a-81bc-ec4a714cf300
Lewandowska, Malgorzata
6625f678-258e-4ccb-a4fd-8385d56223d8

Bazarnik, Piotr, Bartkowska, Aleksandra, Langdon, Terence G, Romelczyk-Baishya, B., Adamczyk-Cieslak, Boguslawa, Dai, Jiaoyan, Huang, Y. and Lewandowska, Malgorzata (2020) Superior strength of tri-layered Al-Cu-Al nano-composites processed by high-pressure torsion. Journal of Alloys and Compounds, 846, [156380]. (doi:10.1016/j.jallcom.2020.156380).

Record type: Article

Abstract


This investigation demonstrates that a solid-state reaction occurs by the application of high-pressure torsion (HPT) in the production of nanostructured multilayered hybrid Al–Cu systems. Three-layered stacks of Al/Cu/Al were subjected for up to 200 revolutions of HPT under an applied pressure of 6.0 GPa. Microstructural and mechanical properties analysis were carried out after HPT using X-ray diffraction, scanning and transmission electron microscopy, energy dispersive spectrometry (EDX), microhardness measurements and tensile tests. The SEM observations revealed the formation of a multi-nano-layered structure in the whole volume of the disks. Further investigations with the use of TEM demonstrated that each nano-layer consists of nano-grains having sizes of about 20 nm. Analysis by XRD and selected area electron diffraction (SAED) confirmed the formation of intermetallic CuAl2 and Cu9Al4 phases in the layered structures. The experiments also showed a significant improvement in microhardness (up to ∼450 Hv) and tensile properties (over 900 MPa of UTS after 200 turns) when compared to both Al-1050 and 99.95%Cu alloys in the initial state and after HPT processing. The results demonstrate that HPT offers an outstanding opportunity for producing novel nanostructured Al–Cu multilayered composites having unique mechanical properties.

Text
Bazarnik JAC-AlCuAl-accepted
Restricted to Repository staff only until 11 July 2022.
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More information

Accepted/In Press date: 11 July 2020
Published date: 23 July 2020
Keywords: Al-Cu, High-pressure torsion, Nano-composites, Phase transformations, Ultrafine grains

Identifiers

Local EPrints ID: 442809
URI: http://eprints.soton.ac.uk/id/eprint/442809
ISSN: 0925-8388
PURE UUID: 5bd3530c-dac1-4082-91a6-79cd572ead11
ORCID for Terence G Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 28 Jul 2020 16:30
Last modified: 26 Nov 2021 02:46

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Contributors

Author: Piotr Bazarnik
Author: Aleksandra Bartkowska
Author: B. Romelczyk-Baishya
Author: Boguslawa Adamczyk-Cieslak
Author: Jiaoyan Dai
Author: Y. Huang
Author: Malgorzata Lewandowska

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