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Original title:
Influence of Heterogeneity of Microstructure on Creep Behaviour of SPD Metals
Authors: Král, Petr ; Dvořák, Jiří ; Kvapilová, Marie ; Svoboda, Milan ; Sklenička, Václav
Document type: Papers
Conference/Event: NANOCON 2012. International Conference /4./, Brno (CZ), 2012-10-23 / 2012-10-25
Year: 2012
Language: eng
Abstract: The methods of severe plastic deformation enable a production of bulk metals with the submicrometer or even nanometer grain size. Experiments were conducted to determine an effect of equal-channel angular pressing (ECAP) on the creep behavior of pure metal. The ECAP deformation was performed at room temperature by route Bc. Constant load creep tests in tension were conducted at 373 K under different stresses. The values of the stress exponent n of the minimum creep rate for ultrafine-grained material were determined. Microstructure of samples was characterized by scanning electron microscope equipped with the electron backscatter diffraction unit. Heterogeneity of microstructure was evaluated by coefficient of variation CVa. It was found that the fracture behavior in UFG materials is influenced by GBS, formation of mesoscopic shear bands and cavitation.
Keywords: creep behaviour; nanoindentation; Ultrafine-grained microstructure
Project no.: CEZ:AV0Z20410507 (CEP), GPP108/10/P469 (CEP)
Funding provider: GA ČR
Host item entry: NANOCON 2012 - Conference Proceedings, ISBN 978-80-87294-32-1
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/11104/0215266
Permalink: http://www.nusl.cz/ntk/nusl-135521
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers
Authors: Král, Petr ; Dvořák, Jiří ; Kvapilová, Marie ; Svoboda, Milan ; Sklenička, Václav
Document type: Papers
Conference/Event: NANOCON 2012. International Conference /4./, Brno (CZ), 2012-10-23 / 2012-10-25
Year: 2012
Language: eng
Abstract: The methods of severe plastic deformation enable a production of bulk metals with the submicrometer or even nanometer grain size. Experiments were conducted to determine an effect of equal-channel angular pressing (ECAP) on the creep behavior of pure metal. The ECAP deformation was performed at room temperature by route Bc. Constant load creep tests in tension were conducted at 373 K under different stresses. The values of the stress exponent n of the minimum creep rate for ultrafine-grained material were determined. Microstructure of samples was characterized by scanning electron microscope equipped with the electron backscatter diffraction unit. Heterogeneity of microstructure was evaluated by coefficient of variation CVa. It was found that the fracture behavior in UFG materials is influenced by GBS, formation of mesoscopic shear bands and cavitation.
Keywords: creep behaviour; nanoindentation; Ultrafine-grained microstructure
Project no.: CEZ:AV0Z20410507 (CEP), GPP108/10/P469 (CEP)
Funding provider: GA ČR
Host item entry: NANOCON 2012 - Conference Proceedings, ISBN 978-80-87294-32-1
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/11104/0215266
Permalink: http://www.nusl.cz/ntk/nusl-135521
The record appears in these collections:
Research > Institutes ASCR > Institute of Physics of Materials
Conference materials > Papers
Record created 2013-01-04, last modified 2022-09-29