Achieving superplasticity in fine-grained Al-Mg-Sc Al
Achieving superplasticity in fine-grained Al-Mg-Sc Al
Superplasticity denotes the ability of a limited number of materials to achieve exceptionally high tensile elongations of at least 400%. Experiments show that the Al-Mg-Sc alloys provide excellent capabilities for achieving superplastic flow and also they can be formed easily in biaxial superplastic forming operations. It is important, therefore, to examine the superplastic flow mechanism when the alloy is prepared using different procedures. This report examines the superplastic characteristics of these alloys after preparation without subjecting to any severe plastic deformation (SPD), after processing using the two SPD procedures of equal-channel angular pressing (ECAP) and high-pressure torsion (HPT) and after processing using the alternative procedure of friction stir processing (FSP). The results are compared using each technique and they are examined with reference to a theoretical model that was developed specifically for superplastic flow in conventional alloys.
equal-channel angular pressing (ECAP), friction stir processing, high-pressure torsion (HPT), severe plastic deformation (SPD), superplasticity
11-17
Pereira, Pedro Henrique R.
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Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Kawasaki, Megumi
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Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Pereira, Pedro Henrique R.
f033a8a6-ddad-4f6a-91ec-521a3358e4c2
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Pereira, Pedro Henrique R., Huang, Yi, Kawasaki, Megumi and Langdon, Terence G.
(2021)
Achieving superplasticity in fine-grained Al-Mg-Sc Al.
Materials Science Forum, 1016, .
(doi:10.4028/www.scientific.net/MSF.1016.11).
Abstract
Superplasticity denotes the ability of a limited number of materials to achieve exceptionally high tensile elongations of at least 400%. Experiments show that the Al-Mg-Sc alloys provide excellent capabilities for achieving superplastic flow and also they can be formed easily in biaxial superplastic forming operations. It is important, therefore, to examine the superplastic flow mechanism when the alloy is prepared using different procedures. This report examines the superplastic characteristics of these alloys after preparation without subjecting to any severe plastic deformation (SPD), after processing using the two SPD procedures of equal-channel angular pressing (ECAP) and high-pressure torsion (HPT) and after processing using the alternative procedure of friction stir processing (FSP). The results are compared using each technique and they are examined with reference to a theoretical model that was developed specifically for superplastic flow in conventional alloys.
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Langdon-THERMEC2020-Keynote-final
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Accepted/In Press date: 16 April 2020
e-pub ahead of print date: January 2021
Keywords:
equal-channel angular pressing (ECAP), friction stir processing, high-pressure torsion (HPT), severe plastic deformation (SPD), superplasticity
Identifiers
Local EPrints ID: 439626
URI: http://eprints.soton.ac.uk/id/eprint/439626
ISSN: 1662-9752
PURE UUID: fbe6eb0c-818d-46a5-bc80-316c1c0efc5d
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Date deposited: 28 Apr 2020 16:35
Last modified: 17 Mar 2024 03:25
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Contributors
Author:
Pedro Henrique R. Pereira
Author:
Yi Huang
Author:
Megumi Kawasaki
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