The high-temperature creep properties of materials processed using severe plastic deformation
The high-temperature creep properties of materials processed using severe plastic deformation
Processing through the application of severe plastic deformation (SPD) is now an accepted procedure for introducing very significant grain refinement into bulk solids. Typically, experiments show that the materials processed in this way have grain sizes in the submicrometer or even the nanometer range. This exceptional grain refinement provides an opportunity for conducting creep tests at elevated temperatures and examining the occurrence of creep flow through mechanisms where the creep rate varies inversely with the grain size. The present paper describes creep experiments conducted on two different representative materials subjected to SPD processing: high-purity aluminum and an aluminum 7034 alloy. The results demonstrate that the creep behavior depends critically upon the thermal stability of the ultrafine-grain microstructures.
750-756
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2009
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Xu, Cheng, Kawasaki, Megumi and Langdon, Terence G.
(2009)
The high-temperature creep properties of materials processed using severe plastic deformation.
International Journal of Materials Research, 6 (199), .
(doi:10.3139/146.110093).
Abstract
Processing through the application of severe plastic deformation (SPD) is now an accepted procedure for introducing very significant grain refinement into bulk solids. Typically, experiments show that the materials processed in this way have grain sizes in the submicrometer or even the nanometer range. This exceptional grain refinement provides an opportunity for conducting creep tests at elevated temperatures and examining the occurrence of creep flow through mechanisms where the creep rate varies inversely with the grain size. The present paper describes creep experiments conducted on two different representative materials subjected to SPD processing: high-purity aluminum and an aluminum 7034 alloy. The results demonstrate that the creep behavior depends critically upon the thermal stability of the ultrafine-grain microstructures.
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Published date: 2009
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 67664
URI: http://eprints.soton.ac.uk/id/eprint/67664
PURE UUID: 944e7026-3de5-4a7f-a2da-a8445418fe1b
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Date deposited: 02 Sep 2009
Last modified: 14 Mar 2024 02:47
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Author:
Cheng Xu
Author:
Megumi Kawasaki
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