Structural evolution on the cross-section of am AZ31 magnesium alloy processed by high-pressure torsion
Structural evolution on the cross-section of am AZ31 magnesium alloy processed by high-pressure torsion
Disks of an AZ31 magnesium alloy were processed by High-Pressure Torsion (HPT) at 463 K to different numbers of rotations. The grain structure was evaluated along the cross-section of the disks using optical microscopy. Significant heterogeneities in the average grain size were observed in areas of the disks which were located at similar distances to the center but at different distances from the surface. Moreover, different grain structures were observed in neighboring areas and shear bands occurred at several locations in the disks. Microhardness tests revealed differences in the strength of the material as a function of the distance to the surface. An analysis of the grain structure and hardness distribution suggests the occurrence of flow localization in HPT processing.
247-252
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2011
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Figueiredo, Roberto B. and Langdon, T.G.
(2011)
Structural evolution on the cross-section of am AZ31 magnesium alloy processed by high-pressure torsion.
Materials Science Forum, 667-669, .
(doi:10.4028/www.scientific.net/MSF.667-669.247).
Abstract
Disks of an AZ31 magnesium alloy were processed by High-Pressure Torsion (HPT) at 463 K to different numbers of rotations. The grain structure was evaluated along the cross-section of the disks using optical microscopy. Significant heterogeneities in the average grain size were observed in areas of the disks which were located at similar distances to the center but at different distances from the surface. Moreover, different grain structures were observed in neighboring areas and shear bands occurred at several locations in the disks. Microhardness tests revealed differences in the strength of the material as a function of the distance to the surface. An analysis of the grain structure and hardness distribution suggests the occurrence of flow localization in HPT processing.
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Published date: 2011
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 187537
URI: http://eprints.soton.ac.uk/id/eprint/187537
ISSN: 1662-9752
PURE UUID: 8b72814c-784d-49eb-a28c-664db3b60c66
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Date deposited: 17 May 2011 12:10
Last modified: 15 Mar 2024 03:13
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Author:
Roberto B. Figueiredo
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