Superplasticity of a fine-grained Mg–9Gd–4Y–0.4Zr alloy evaluated using shear punch testing
Superplasticity of a fine-grained Mg–9Gd–4Y–0.4Zr alloy evaluated using shear punch testing
The superplasticity of an extruded fine-grained Mg–9Gd–4Y–0.4Zr alloy was investigated by measuring the strain rate sensitivity using shear punch testing (SPT). Shear punch tests were conducted at shear strain rates in the range of 3 × 10?3–2 × 10?1 s?1 and at temperatures in the range of 573–773 K. The results indicate the strain rate sensitivity, m, increases from about 0.11 at 573 K to about 0.40 at 723 K and then decreases to 0.32 with a further increase in test temperature. A strain rate sensitivity of 0.40 and an activation energy of 140 kJ/mol are indicative of a superplastic deformation behavior dominated by grain boundary sliding accommodated by lattice diffusion at temperatures above 673 K.
Mg–Gd–Y–Zr alloy, superplasticity, strain rate sensitivity, shear punch
228-232
Alizadeh, Reza
12ca94ae-ee4d-47c4-b99c-ef27b6187027
Mahmudi, Reza
d3db324a-867a-4e9f-91be-b103fc11e22d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
July 2014
Alizadeh, Reza
12ca94ae-ee4d-47c4-b99c-ef27b6187027
Mahmudi, Reza
d3db324a-867a-4e9f-91be-b103fc11e22d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Alizadeh, Reza, Mahmudi, Reza and Langdon, Terence G.
(2014)
Superplasticity of a fine-grained Mg–9Gd–4Y–0.4Zr alloy evaluated using shear punch testing.
Journal of Materials Research and Technology, 3 (3), .
(doi:10.1016/j.jmrt.2014.04.004).
Abstract
The superplasticity of an extruded fine-grained Mg–9Gd–4Y–0.4Zr alloy was investigated by measuring the strain rate sensitivity using shear punch testing (SPT). Shear punch tests were conducted at shear strain rates in the range of 3 × 10?3–2 × 10?1 s?1 and at temperatures in the range of 573–773 K. The results indicate the strain rate sensitivity, m, increases from about 0.11 at 573 K to about 0.40 at 723 K and then decreases to 0.32 with a further increase in test temperature. A strain rate sensitivity of 0.40 and an activation energy of 140 kJ/mol are indicative of a superplastic deformation behavior dominated by grain boundary sliding accommodated by lattice diffusion at temperatures above 673 K.
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More information
Accepted/In Press date: 30 April 2014
e-pub ahead of print date: June 2014
Published date: July 2014
Keywords:
Mg–Gd–Y–Zr alloy, superplasticity, strain rate sensitivity, shear punch
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 377241
URI: http://eprints.soton.ac.uk/id/eprint/377241
ISSN: 2238-7854
PURE UUID: fb106eaa-f69c-4cb9-96e5-5d510de49fc0
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Date deposited: 20 May 2015 10:28
Last modified: 15 Mar 2024 03:13
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Author:
Reza Alizadeh
Author:
Reza Mahmudi
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