Evaluating the flow processes in ultrafine-grained materials at elevated temperatures
Evaluating the flow processes in ultrafine-grained materials at elevated temperatures
When polycrystalline materials are tested in tension at elevated temperatures, the flow mechanisms depend upon various parameters including the temperature of testing, the applied stress and the material grain size. The plotting of deformation mechanism maps is a procedure used widely in displaying and interpreting the creep properties of conventional coarse-grained metals but there have been few attempts to date to use this same procedure for ultrafine-grained and nanocrystalline materials produced through the application of severe plastic deformation (SPD). This report examines the potential for using deformation mechanism mapping for materials processed by SPD and presents examples for materials processed using equal-channel angular pressing and high-pressure torsion.
deformation mechanism maps, equal-channel angular pressing, flow processes, high-pressure torsion, superplasticity
565-570
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
May 2013
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Kawasaki, Megumi and Langdon, Terence G.
(2013)
Evaluating the flow processes in ultrafine-grained materials at elevated temperatures.
Materials Research, 16 (3), .
(doi:10.1590/S1516-14392013005000023).
Abstract
When polycrystalline materials are tested in tension at elevated temperatures, the flow mechanisms depend upon various parameters including the temperature of testing, the applied stress and the material grain size. The plotting of deformation mechanism maps is a procedure used widely in displaying and interpreting the creep properties of conventional coarse-grained metals but there have been few attempts to date to use this same procedure for ultrafine-grained and nanocrystalline materials produced through the application of severe plastic deformation (SPD). This report examines the potential for using deformation mechanism mapping for materials processed by SPD and presents examples for materials processed using equal-channel angular pressing and high-pressure torsion.
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Published date: May 2013
Keywords:
deformation mechanism maps, equal-channel angular pressing, flow processes, high-pressure torsion, superplasticity
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 359494
URI: http://eprints.soton.ac.uk/id/eprint/359494
ISSN: 1516-1439
PURE UUID: 22965fd7-6fe4-44f8-8059-552679402101
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Date deposited: 04 Nov 2013 16:31
Last modified: 15 Mar 2024 03:13
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Author:
Megumi Kawasaki
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