Grain size and microhardness evolution during annealing of a magnesium alloy processed by high-pressure torsion
Grain size and microhardness evolution during annealing of a magnesium alloy processed by high-pressure torsion
High-pressure torsion (HPT) was used to impose severe plastic deformation on a magnesium alloy AZ31. The material was processed for 0.5, 1, 2, 3, 5 and 7 turns at room temperature under a pressure of 6.0 GPa. Samples were annealed for 1800 s at temperatures of 373 K, 423 K, 473 K, 573 K and 673 K. Microhardness tests and metallography were used to determine the evolution of strength and grain size as a function of the annealing temperature. The results show that recrystallization takes place at temperatures higher than 423 K. The annealing behavior is independent of the number of turns in HPT.
magnesium alloys, high-pressure torsion, annealing, severe plastic deformation
14-17
Malheiros, Livia Raquel C.
18fded97-64bb-4827-9501-f7604588445a
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
January 2015
Malheiros, Livia Raquel C.
18fded97-64bb-4827-9501-f7604588445a
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Malheiros, Livia Raquel C., Figueiredo, Roberto B. and Langdon, Terence G.
(2015)
Grain size and microhardness evolution during annealing of a magnesium alloy processed by high-pressure torsion.
Journal of Materials Research and Technology, 4 (1), .
(doi:10.1016/j.jmrt.2014.10.008).
Abstract
High-pressure torsion (HPT) was used to impose severe plastic deformation on a magnesium alloy AZ31. The material was processed for 0.5, 1, 2, 3, 5 and 7 turns at room temperature under a pressure of 6.0 GPa. Samples were annealed for 1800 s at temperatures of 373 K, 423 K, 473 K, 573 K and 673 K. Microhardness tests and metallography were used to determine the evolution of strength and grain size as a function of the annealing temperature. The results show that recrystallization takes place at temperatures higher than 423 K. The annealing behavior is independent of the number of turns in HPT.
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More information
Accepted/In Press date: 13 October 2014
e-pub ahead of print date: 20 November 2014
Published date: January 2015
Keywords:
magnesium alloys, high-pressure torsion, annealing, severe plastic deformation
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 377249
URI: http://eprints.soton.ac.uk/id/eprint/377249
ISSN: 2238-7854
PURE UUID: b35ab56c-9c43-4681-967e-2305cf5d9074
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Date deposited: 20 May 2015 15:34
Last modified: 15 Mar 2024 03:13
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Author:
Livia Raquel C. Malheiros
Author:
Roberto B. Figueiredo
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