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Original title:
PHASE EVOLUTION IN Ni-48 at.% TI SHAPE MEMORY ALLOY PREPARED BY SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS
Authors: Karlík, M. ; Haušild, P. ; Beran, Přemysl ; Novák, P. ; Čapek, J. ; Kučera, V. ; Kopeček, Jaromír
Document type: Papers
Conference/Event: METAL 2015. 24th International conference on metallurgy and materials, Brno (CZ), 20150603
Year: 2015
Language: eng
Abstract: In Ni rich Ni–Ti alloys, various phases such as hexagonal Ni3Ti, cubic NiTi2 and rhombohedral Ni4Ti3 appear during heat treatment. The presence of these precipitates affects the shape memory effect and superelasticity in an important manner. In this paper we present a study of the phase evolution during annealing of the Ni–48at.%Ti shape memory alloy elaborated by self-propagating high-temperature synthesis (SHS). Morphology and crystallography of the phases were examined by means of light metallography, scanning electron microscopy (SEM), neutron and X-ray diffraction, transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS). Besides the phases mentioned in the\nliterature, a Ni-rich phase with the composition near Ni3Ti2 stoichiometry and having a cubic symmetry was found. This phase develops from Ni4Ti3 particles during slow (furnace) cooling from the temperature of 1000 °C. Its particles have the form of thin platelets coherent with the (B2) NiTi matrix. The orientation relation is either cube-to-cube, [111]P || [115]B2 and (1-10)P || (1-10)B2 or [011]P || [011]B2 and (1-10)P || (1-41)B2.\n
Keywords: light and electron microscopy; neutron diffraction; NiTi shape memory alloy; phase analysis
Project no.: GA14-03044S (CEP)
Funding provider: GA ČR
Host item entry: METAL 2015: 24th International Conference on Metallurgy and Materials, Conference Proceedings, ISBN 978-80-87294-62-8
Institution: Nuclear Physics Institute AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0269101
Permalink: http://www.nusl.cz/ntk/nusl-263377
The record appears in these collections:
Research > Institutes ASCR > Nuclear Physics Institute
Conference materials > Papers
Authors: Karlík, M. ; Haušild, P. ; Beran, Přemysl ; Novák, P. ; Čapek, J. ; Kučera, V. ; Kopeček, Jaromír
Document type: Papers
Conference/Event: METAL 2015. 24th International conference on metallurgy and materials, Brno (CZ), 20150603
Year: 2015
Language: eng
Abstract: In Ni rich Ni–Ti alloys, various phases such as hexagonal Ni3Ti, cubic NiTi2 and rhombohedral Ni4Ti3 appear during heat treatment. The presence of these precipitates affects the shape memory effect and superelasticity in an important manner. In this paper we present a study of the phase evolution during annealing of the Ni–48at.%Ti shape memory alloy elaborated by self-propagating high-temperature synthesis (SHS). Morphology and crystallography of the phases were examined by means of light metallography, scanning electron microscopy (SEM), neutron and X-ray diffraction, transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS). Besides the phases mentioned in the\nliterature, a Ni-rich phase with the composition near Ni3Ti2 stoichiometry and having a cubic symmetry was found. This phase develops from Ni4Ti3 particles during slow (furnace) cooling from the temperature of 1000 °C. Its particles have the form of thin platelets coherent with the (B2) NiTi matrix. The orientation relation is either cube-to-cube, [111]P || [115]B2 and (1-10)P || (1-10)B2 or [011]P || [011]B2 and (1-10)P || (1-41)B2.\n
Keywords: light and electron microscopy; neutron diffraction; NiTi shape memory alloy; phase analysis
Project no.: GA14-03044S (CEP)
Funding provider: GA ČR
Host item entry: METAL 2015: 24th International Conference on Metallurgy and Materials, Conference Proceedings, ISBN 978-80-87294-62-8
Institution: Nuclear Physics Institute AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0269101
Permalink: http://www.nusl.cz/ntk/nusl-263377
The record appears in these collections:
Research > Institutes ASCR > Nuclear Physics Institute
Conference materials > Papers
Record created 2017-03-03, last modified 2023-12-06