Examining the thermal stability of an Al-Mg-Sc alloy processed by High-Pressure Torsion
Examining the thermal stability of an Al-Mg-Sc alloy processed by High-Pressure Torsion
An Al-3%Mg-0.2%Sc alloy was solution treated and subjected to 10 turns of high-pressure torsion (HPT). Thereafter, the HPT-processed material was annealed for 1 hour at temperatures ranging from 423 to 773 K and its mechanical properties and microstructural evolution were examined using microhardness measurements and EBSD analysis. The results demonstrate that the Al-Mg-Sc alloy exhibits an average microhardness of ~190 Hv and an average grain size of ~140 nm immediately after HPT processing and also after further annealing at 423 K. Conversely, it is shown that annealing at temperatures above 473 K leads to a substantial decrease in the hardness values as well as a sharp increase in the grain size of the material previously processed by HPT. In addition, detailed EBSD analysis revealed the formation of a bi-modal distribution of grains after annealing at temperatures from 623 to 773 K, and this becomes more uniform with increasing temperatures.
39-45
Pereira, Pedro H.R.
9ee129fd-0e06-482d-990c-971aaf83b1d0
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
31 December 2017
Pereira, Pedro H.R.
9ee129fd-0e06-482d-990c-971aaf83b1d0
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Pereira, Pedro H.R., Huang, Yi and Langdon, Terence G.
(2017)
Examining the thermal stability of an Al-Mg-Sc alloy processed by High-Pressure Torsion.
Materials Research, 20 (S1), .
(doi:10.1590/1980-5373-MR-2017-0207).
Abstract
An Al-3%Mg-0.2%Sc alloy was solution treated and subjected to 10 turns of high-pressure torsion (HPT). Thereafter, the HPT-processed material was annealed for 1 hour at temperatures ranging from 423 to 773 K and its mechanical properties and microstructural evolution were examined using microhardness measurements and EBSD analysis. The results demonstrate that the Al-Mg-Sc alloy exhibits an average microhardness of ~190 Hv and an average grain size of ~140 nm immediately after HPT processing and also after further annealing at 423 K. Conversely, it is shown that annealing at temperatures above 473 K leads to a substantial decrease in the hardness values as well as a sharp increase in the grain size of the material previously processed by HPT. In addition, detailed EBSD analysis revealed the formation of a bi-modal distribution of grains after annealing at temperatures from 623 to 773 K, and this becomes more uniform with increasing temperatures.
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Pedro-MR-accepted manuscript
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1516-1439-mr-1980-5373-MR-2017-0207
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Accepted/In Press date: 19 September 2017
e-pub ahead of print date: 23 October 2017
Published date: 31 December 2017
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Local EPrints ID: 414236
URI: http://eprints.soton.ac.uk/id/eprint/414236
ISSN: 1516-1439
PURE UUID: 3e77a7e7-5109-4981-ad27-f4cd7fb2fe67
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Date deposited: 20 Sep 2017 16:31
Last modified: 16 Mar 2024 04:08
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Author:
Pedro H.R. Pereira
Author:
Yi Huang
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