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Fabrication of nanocomposites through diffusion bonding under high-pressure torsion

Fabrication of nanocomposites through diffusion bonding under high-pressure torsion
Fabrication of nanocomposites through diffusion bonding under high-pressure torsion
This report summarizes a recent study demonstrating simple and rapid synthesis of a new Al-Mg alloy system and ultimately synthesizing a metal matrix nanocomposite (MMNC) which was achieved by processing stacked disks of the two dissimilar metals by conventional high-pressure torsion (HPT) processing. The synthesized Al-Mg alloy system exhibits exceptionally high hardness through rapid diffusion bonding and simultaneous nucleation of intermetallic phases with increased numbers of HPT turns through 20 and improved plasticity was demonstrated by increasing strain rate sensitivity in the alloy system after post-deformation annealing. An additional experiment demonstrated that the alternate stacking of high numbers of dissimilar metal disks may produce a faster metal mixture during HPT. Metal combinations of Al-Cu, Al-Fe and Al-Ti were processed by the same HPT procedure from separate pure metals to examine the feasibility of the processing technique. The microstructural analysis confirmed the capability of HPT for the formation of heterostructures across the disk diameters in these processed alloy systems. The HPT processing demonstrates a considerable potential for the joining and bonding of dissimilar metals at room temperature and the expeditious fabrication of a wide range of new metal systems.
Al–Mg, diffusion bonding, high-pressure torsion, intermetallic compound, severe plastic deformation
2700-2710
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Han, Jae Kyung
226cace6-ffa5-49a4-a5af-7b6620adbf9f
Lee, Dong Hyun
ec3353f2-8c5b-496c-a481-190372703f91
Jang, Jae il
7dc02f15-31e3-4c42-a7e3-2ac1f4edca76
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Han, Jae Kyung
226cace6-ffa5-49a4-a5af-7b6620adbf9f
Lee, Dong Hyun
ec3353f2-8c5b-496c-a481-190372703f91
Jang, Jae il
7dc02f15-31e3-4c42-a7e3-2ac1f4edca76
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Kawasaki, Megumi, Han, Jae Kyung, Lee, Dong Hyun, Jang, Jae il and Langdon, Terence G. (2018) Fabrication of nanocomposites through diffusion bonding under high-pressure torsion. Journal of Materials Research, 33 (18), 2700-2710. (doi:10.1557/jmr.2018.205).

Record type: Article

Abstract

This report summarizes a recent study demonstrating simple and rapid synthesis of a new Al-Mg alloy system and ultimately synthesizing a metal matrix nanocomposite (MMNC) which was achieved by processing stacked disks of the two dissimilar metals by conventional high-pressure torsion (HPT) processing. The synthesized Al-Mg alloy system exhibits exceptionally high hardness through rapid diffusion bonding and simultaneous nucleation of intermetallic phases with increased numbers of HPT turns through 20 and improved plasticity was demonstrated by increasing strain rate sensitivity in the alloy system after post-deformation annealing. An additional experiment demonstrated that the alternate stacking of high numbers of dissimilar metal disks may produce a faster metal mixture during HPT. Metal combinations of Al-Cu, Al-Fe and Al-Ti were processed by the same HPT procedure from separate pure metals to examine the feasibility of the processing technique. The microstructural analysis confirmed the capability of HPT for the formation of heterostructures across the disk diameters in these processed alloy systems. The HPT processing demonstrates a considerable potential for the joining and bonding of dissimilar metals at room temperature and the expeditious fabrication of a wide range of new metal systems.

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Accepted/In Press date: 6 June 2018
e-pub ahead of print date: 19 July 2018
Published date: 28 September 2018
Keywords: Al–Mg, diffusion bonding, high-pressure torsion, intermetallic compound, severe plastic deformation

Identifiers

Local EPrints ID: 421415
URI: http://eprints.soton.ac.uk/id/eprint/421415
PURE UUID: e59b2309-ccc3-4fb6-8e40-e0fc3d9d07e7
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

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Date deposited: 11 Jun 2018 16:30
Last modified: 17 Dec 2019 05:23

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Contributors

Author: Megumi Kawasaki
Author: Jae Kyung Han
Author: Dong Hyun Lee
Author: Jae il Jang

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