The role of processing temperature for achieving superplastic properties in an Al-3Mg-0.2Sc alloy processed by high-pressure torsion
The role of processing temperature for achieving superplastic properties in an Al-3Mg-0.2Sc alloy processed by high-pressure torsion
Experiments were conducted to systematically assess the superplastic properties and the microstructural changes of an Al-3Mg-0.2Sc alloy processed by 10 HPT revolutions at room temperature (RT ≈ 300 K) or at 450 K after subsequent tensile testing at temperatures from 473 to 723 K over a wide range of strain rates. The HPT processing at RT led to the development of elongated grains with an average size of ~140 nm whereas the grain structures were equiaxed and slightly larger (~150 nm) after HPT at 450 K. After HPT processing at RT, the Al-Mg-Sc alloy exhibited true superplastic flow at low homologous temperatures and attained a maximum elongation of ~850 % at 523 K. Nevertheless, the elongations decreased at temperatures T ≥ 623 K and an elongation higher than 400 % was only achieved at 673 K for a strain rate of
aluminium alloys, grain boundary sliding, high-pressure torsion, superplasticity, ultrafine grains
Pereira, Pedro Henrique R.
f033a8a6-ddad-4f6a-91ec-521a3358e4c2
Bazarnik, Piotr
d6764d8b-39bb-43eb-a3b1-09043b4575df
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Lewandowska, Malgorzata
c574d02d-d34d-4164-8ed1-90c3d77584d2
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
25 September 2024
Pereira, Pedro Henrique R.
f033a8a6-ddad-4f6a-91ec-521a3358e4c2
Bazarnik, Piotr
d6764d8b-39bb-43eb-a3b1-09043b4575df
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Lewandowska, Malgorzata
c574d02d-d34d-4164-8ed1-90c3d77584d2
Langdon, Terence G
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Pereira, Pedro Henrique R., Bazarnik, Piotr, Huang, Yi, Lewandowska, Malgorzata and Langdon, Terence G
(2024)
The role of processing temperature for achieving superplastic properties in an Al-3Mg-0.2Sc alloy processed by high-pressure torsion.
Materials Science and Engineering: A.
Abstract
Experiments were conducted to systematically assess the superplastic properties and the microstructural changes of an Al-3Mg-0.2Sc alloy processed by 10 HPT revolutions at room temperature (RT ≈ 300 K) or at 450 K after subsequent tensile testing at temperatures from 473 to 723 K over a wide range of strain rates. The HPT processing at RT led to the development of elongated grains with an average size of ~140 nm whereas the grain structures were equiaxed and slightly larger (~150 nm) after HPT at 450 K. After HPT processing at RT, the Al-Mg-Sc alloy exhibited true superplastic flow at low homologous temperatures and attained a maximum elongation of ~850 % at 523 K. Nevertheless, the elongations decreased at temperatures T ≥ 623 K and an elongation higher than 400 % was only achieved at 673 K for a strain rate of
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Published date: 25 September 2024
Keywords:
aluminium alloys, grain boundary sliding, high-pressure torsion, superplasticity, ultrafine grains
Identifiers
Local EPrints ID: 494729
URI: http://eprints.soton.ac.uk/id/eprint/494729
ISSN: 0921-5093
PURE UUID: 3809baed-ef30-4505-9dc0-3c536fc70895
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Date deposited: 14 Oct 2024 17:04
Last modified: 15 Oct 2024 01:44
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Contributors
Author:
Pedro Henrique R. Pereira
Author:
Piotr Bazarnik
Author:
Yi Huang
Author:
Malgorzata Lewandowska
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