Influence of number of passes in ECAP on superplastic behavior in a magnesium alloy
Influence of number of passes in ECAP on superplastic behavior in a magnesium alloy
Tensile tests were carried out at 473 K with initial strain rate of 10-4 s-1 in samples of a
ZK60 alloy (Mg-5.5% Zn-0.5% Zr) processed by different number of passes using Equal-Channel
Angular Pressing (ECAP). The measured superplastic elongations ranged from ~930% to a record
of ~3050%. The flow behavior was found to vary with the number of passes of ECAP. It is shown
that strain-hardening due to grain growth and the evolution of the strain rate sensitivity with the
strain determines the flow behavior and final elongations. The results are consistent with theories of
plastic flow in tensile testing.
170-175
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2008
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Figueiredo, Roberto B. and Langdon, Terence G.
(2008)
Influence of number of passes in ECAP on superplastic behavior in a magnesium alloy.
Materials Science Forum, 584-586, .
(doi:10.4028/0-87849-375-1.170).
Abstract
Tensile tests were carried out at 473 K with initial strain rate of 10-4 s-1 in samples of a
ZK60 alloy (Mg-5.5% Zn-0.5% Zr) processed by different number of passes using Equal-Channel
Angular Pressing (ECAP). The measured superplastic elongations ranged from ~930% to a record
of ~3050%. The flow behavior was found to vary with the number of passes of ECAP. It is shown
that strain-hardening due to grain growth and the evolution of the strain rate sensitivity with the
strain determines the flow behavior and final elongations. The results are consistent with theories of
plastic flow in tensile testing.
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Published date: 2008
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 64267
URI: http://eprints.soton.ac.uk/id/eprint/64267
ISSN: 1662-9752
PURE UUID: 7875f4e8-4ac7-45b0-a33b-f12ed2059faa
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Date deposited: 24 Dec 2008
Last modified: 16 Mar 2024 03:28
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Author:
Roberto B. Figueiredo
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