Properties of NiMnGa alloys ultra rapidly solidified by suction casting
Ni2MnGa alloys are obtained by suction casting in water chilled cylindrical copper moulds 50 mm long and 1-4 mm in diameter; the microstructure and the magnetic properties are then investigated as functions of the cylinder diameter. The solidification substructures are characterized by scanning electron microscopy and confocal microscopy. The martensitic transformation temperatures, determined by magnetization vs. temperature measurements, are lower than those measured in bulk Ni2MnGa single crystals (202 K). The demagnetization curves measured from saturation in the martensitic state show two steps: the first is at about+130 mT and the larger second one at relatively large inverse fields (about -300 mT), except in cylinders 4 mm in diameter, where these steps overlap at low inverse fields. These steps are likely to arise from a demagnetization mechanism involving field induced twin boundary motion in a few martensite variants, indicating a ferromagnetic shape memory effect in the cylinders.
Main Authors: | , , , , , , |
---|---|
Format: | article biblioteca |
Language: | eng |
Published: |
2015
|
Subjects: | Ni2MnGa alloy, Ultra rapid solidification, Magnetic shape memory, Martensitic transformation, |
Online Access: | http://hdl.handle.net/11086/20785 https://doi.org/10.1016/j.mspro.2015.04.111 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-unc-ar-11086-20785 |
---|---|
record_format |
koha |
spelling |
dig-unc-ar-11086-207852022-10-13T11:08:14Z Properties of NiMnGa alloys ultra rapidly solidified by suction casting Rodoni, Esteban Levingston, Jorge Matías Deghi, Sebastián Esteban Lescano, Daniel Eduardo Pozo López, Gabriela del Valle Urreta, Silvia Elena Fabietti, Luis María Rodolfo Ni2MnGa alloy Ultra rapid solidification Magnetic shape memory Martensitic transformation Ni2MnGa alloys are obtained by suction casting in water chilled cylindrical copper moulds 50 mm long and 1-4 mm in diameter; the microstructure and the magnetic properties are then investigated as functions of the cylinder diameter. The solidification substructures are characterized by scanning electron microscopy and confocal microscopy. The martensitic transformation temperatures, determined by magnetization vs. temperature measurements, are lower than those measured in bulk Ni2MnGa single crystals (202 K). The demagnetization curves measured from saturation in the martensitic state show two steps: the first is at about+130 mT and the larger second one at relatively large inverse fields (about -300 mT), except in cylinders 4 mm in diameter, where these steps overlap at low inverse fields. These steps are likely to arise from a demagnetization mechanism involving field induced twin boundary motion in a few martensite variants, indicating a ferromagnetic shape memory effect in the cylinders. publishedVersion Fil: Rodoni, Esteban. Comisión Nacional de Energía Atómica. Instituto de Tecnología Sabato; Argentina. Fil: Rodoni, Esteban. Universidad de San Martín. Instituto de Tecnología Sabato; Argentina. Fil: Levingston, Jorge Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Levingston, Jorge Matías. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Deghi, Sebastián Esteban. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Lescano, Daniel Eduardo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Pozo López, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Pozo López, Gabriela del Valle. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Urreta, Silvia Elena. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Fabietti, Luis María Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Fabietti, Luis María Rodolfo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Física de los Materiales Condensados 2021-10-12T17:09:30Z 2021-10-12T17:09:30Z 2015 article Rodoni, E., Levingston, J. M., Deghi, S. E., Lescano, D. E., Pozo López, G., Urreta, S. E. y Fabietti, L. M. R. (2015). Properties of NiMnGa alloys ultra rapidly solidified by suction casting. Procedia Materials Science, 8, 577-585. https://doi.org/10.1016/j.mspro.2015.04.111 http://hdl.handle.net/11086/20785 https://doi.org/10.1016/j.mspro.2015.04.111 eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Impreso; Electrónico y/o Digital ISSN 2211-8128 |
institution |
UNC AR |
collection |
DSpace |
country |
Argentina |
countrycode |
AR |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-unc-ar |
tag |
biblioteca |
region |
America del Sur |
libraryname |
Biblioteca 'Ing. Agrónomo Moisés Farber' de la Facultad de Ciencias Agropecuarias |
language |
eng |
topic |
Ni2MnGa alloy Ultra rapid solidification Magnetic shape memory Martensitic transformation Ni2MnGa alloy Ultra rapid solidification Magnetic shape memory Martensitic transformation |
spellingShingle |
Ni2MnGa alloy Ultra rapid solidification Magnetic shape memory Martensitic transformation Ni2MnGa alloy Ultra rapid solidification Magnetic shape memory Martensitic transformation Rodoni, Esteban Levingston, Jorge Matías Deghi, Sebastián Esteban Lescano, Daniel Eduardo Pozo López, Gabriela del Valle Urreta, Silvia Elena Fabietti, Luis María Rodolfo Properties of NiMnGa alloys ultra rapidly solidified by suction casting |
description |
Ni2MnGa alloys are obtained by suction casting in water chilled cylindrical copper moulds 50 mm long and 1-4 mm in diameter; the microstructure and the magnetic properties are then investigated as functions of the cylinder diameter. The solidification substructures are characterized by scanning electron microscopy and confocal microscopy. The martensitic transformation temperatures, determined by magnetization vs. temperature measurements, are lower than those measured in bulk Ni2MnGa single crystals (202 K). The demagnetization curves measured from saturation in the martensitic state show two steps: the first is at about+130 mT and the larger second one at relatively large inverse fields (about -300 mT), except in cylinders 4 mm in diameter, where these steps overlap at low inverse fields. These steps are likely to arise from a demagnetization mechanism involving field induced twin boundary motion in a few martensite variants, indicating a ferromagnetic shape memory effect in the cylinders. |
format |
article |
topic_facet |
Ni2MnGa alloy Ultra rapid solidification Magnetic shape memory Martensitic transformation |
author |
Rodoni, Esteban Levingston, Jorge Matías Deghi, Sebastián Esteban Lescano, Daniel Eduardo Pozo López, Gabriela del Valle Urreta, Silvia Elena Fabietti, Luis María Rodolfo |
author_facet |
Rodoni, Esteban Levingston, Jorge Matías Deghi, Sebastián Esteban Lescano, Daniel Eduardo Pozo López, Gabriela del Valle Urreta, Silvia Elena Fabietti, Luis María Rodolfo |
author_sort |
Rodoni, Esteban |
title |
Properties of NiMnGa alloys ultra rapidly solidified by suction casting |
title_short |
Properties of NiMnGa alloys ultra rapidly solidified by suction casting |
title_full |
Properties of NiMnGa alloys ultra rapidly solidified by suction casting |
title_fullStr |
Properties of NiMnGa alloys ultra rapidly solidified by suction casting |
title_full_unstemmed |
Properties of NiMnGa alloys ultra rapidly solidified by suction casting |
title_sort |
properties of nimnga alloys ultra rapidly solidified by suction casting |
publishDate |
2015 |
url |
http://hdl.handle.net/11086/20785 https://doi.org/10.1016/j.mspro.2015.04.111 |
work_keys_str_mv |
AT rodoniesteban propertiesofnimngaalloysultrarapidlysolidifiedbysuctioncasting AT levingstonjorgematias propertiesofnimngaalloysultrarapidlysolidifiedbysuctioncasting AT deghisebastianesteban propertiesofnimngaalloysultrarapidlysolidifiedbysuctioncasting AT lescanodanieleduardo propertiesofnimngaalloysultrarapidlysolidifiedbysuctioncasting AT pozolopezgabrieladelvalle propertiesofnimngaalloysultrarapidlysolidifiedbysuctioncasting AT urretasilviaelena propertiesofnimngaalloysultrarapidlysolidifiedbysuctioncasting AT fabiettiluismariarodolfo propertiesofnimngaalloysultrarapidlysolidifiedbysuctioncasting |
_version_ |
1756009598491295744 |