Influence of strain rate on the characteristics of a magnesium alloy processed by high-pressure torsion
Influence of strain rate on the characteristics of a magnesium alloy processed by high-pressure torsion
A commercial magnesium AZ31 alloy was processed by high-pressure torsion (HPT) through 5 turns at 453 K using three different rotation rates. The results show that HPT introduces significant grain refinement to an average grain size of 0.5 ?m. The processed structures were heterogeneous in the centers of the disks and homogeneous at distances at and above 1 mm from the disk centers. The measured values of the microhardness were also reasonably homogeneous after HPT except only near the disk centers. The hardness values and the average grain sizes were correlated with the local strain rates by using the imposed rotation rates and estimates of the strains within the disks. The results demonstrate the hardness and the average grain size both exhibit a small dependence on the local strain rate.
hardness, high-pressure torsion, homogeneity, magnesium alloy, ultrafine grains
3601-3608
Serre, Pauline
e8923b38-1501-4515-a762-3b9900ec048e
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
25 April 2011
Serre, Pauline
e8923b38-1501-4515-a762-3b9900ec048e
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Serre, Pauline, Figueiredo, Roberto B., Gao, Nong and Langdon, Terence G.
(2011)
Influence of strain rate on the characteristics of a magnesium alloy processed by high-pressure torsion.
Materials Science and Engineering: A, 528 (10-11), .
(doi:10.1016/j.msea.2011.01.066).
Abstract
A commercial magnesium AZ31 alloy was processed by high-pressure torsion (HPT) through 5 turns at 453 K using three different rotation rates. The results show that HPT introduces significant grain refinement to an average grain size of 0.5 ?m. The processed structures were heterogeneous in the centers of the disks and homogeneous at distances at and above 1 mm from the disk centers. The measured values of the microhardness were also reasonably homogeneous after HPT except only near the disk centers. The hardness values and the average grain sizes were correlated with the local strain rates by using the imposed rotation rates and estimates of the strains within the disks. The results demonstrate the hardness and the average grain size both exhibit a small dependence on the local strain rate.
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Published date: 25 April 2011
Keywords:
hardness, high-pressure torsion, homogeneity, magnesium alloy, ultrafine grains
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 179541
URI: http://eprints.soton.ac.uk/id/eprint/179541
ISSN: 0921-5093
PURE UUID: 35ea511c-7b70-455b-b652-47e47e1fc55a
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Date deposited: 07 Apr 2011 10:54
Last modified: 15 Mar 2024 03:13
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Author:
Pauline Serre
Author:
Roberto B. Figueiredo
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