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Original title:
Effect of different number of ECAP passes on creep in Cu-Zr alloy
Authors: Král, Petr ; Dvořák, Jiří ; Svoboda, Milan ; Kvapilová, Marie ; Sklenička, Václav
Document type: Papers
Conference/Event: Metal 2010. International Conference on Metallurgy and Materials /19./, Rožnov pod Radhoštěm (CZ), 2010-05-18 / 2010-05-20
Year: 2010
Language: eng
Abstract: A coarse-grained binary Cu-0.2wt%Zr alloy was processed by equal-channel angular pressing (ECAP) in order to evaluate the effect of severe plastic deformation on the thermal stability of resulting ultrafine-grained microstructure after ECAP and on creep behaviour of the pressed alloy. Constant stress creep tests in tension were conducted at temperature 673 K and at the different applied stresses. It was found that the Cu-0.2Zr alloy after the first four ECAP passes exhibited higher creep resistance by comparison with unpressed state. However, the alloy processed by 8 ECAP passes showed faster creep rate than unpressed material under the same loading conditions. The measured value of stress exponent of the creep rate n~6 indicates possibility of an intragranular deformation mechanism as the rate-controlling process in creep of an alloy after 8 ECAP passes. Furthermore, creep behaviour of ECAPed material may be influenced by mesoscopic boundary sliding along shear bands.
Keywords: creep; equal-channel angular pressing; ultrafine-grained microstructure
Project no.: CEZ:AV0Z20410507 (CEP), GPP108/10/P469 (CEP)
Funding provider: GA ČR
Host item entry: Metal 2010. 19th International conference on metallurgy and materials - Conference Proceedings, ISBN 978-80-87294-17-8
Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0189736
Permalink: http://www.nusl.cz/ntk/nusl-42058
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers
Authors: Král, Petr ; Dvořák, Jiří ; Svoboda, Milan ; Kvapilová, Marie ; Sklenička, Václav
Document type: Papers
Conference/Event: Metal 2010. International Conference on Metallurgy and Materials /19./, Rožnov pod Radhoštěm (CZ), 2010-05-18 / 2010-05-20
Year: 2010
Language: eng
Abstract: A coarse-grained binary Cu-0.2wt%Zr alloy was processed by equal-channel angular pressing (ECAP) in order to evaluate the effect of severe plastic deformation on the thermal stability of resulting ultrafine-grained microstructure after ECAP and on creep behaviour of the pressed alloy. Constant stress creep tests in tension were conducted at temperature 673 K and at the different applied stresses. It was found that the Cu-0.2Zr alloy after the first four ECAP passes exhibited higher creep resistance by comparison with unpressed state. However, the alloy processed by 8 ECAP passes showed faster creep rate than unpressed material under the same loading conditions. The measured value of stress exponent of the creep rate n~6 indicates possibility of an intragranular deformation mechanism as the rate-controlling process in creep of an alloy after 8 ECAP passes. Furthermore, creep behaviour of ECAPed material may be influenced by mesoscopic boundary sliding along shear bands.
Keywords: creep; equal-channel angular pressing; ultrafine-grained microstructure
Project no.: CEZ:AV0Z20410507 (CEP), GPP108/10/P469 (CEP)
Funding provider: GA ČR
Host item entry: Metal 2010. 19th International conference on metallurgy and materials - Conference Proceedings, ISBN 978-80-87294-17-8
Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0189736
Permalink: http://www.nusl.cz/ntk/nusl-42058
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers
Record created 2011-07-04, last modified 2024-01-26