Properties of NiMnGa alloys ultra rapidly solidified by suction casting

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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 elec...

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Detalles Bibliográficos
Autores principales: Rodoni, Esteban, Levingston, Jorge Matías, Deghi, Sebastián Esteban, Lescano, Daniel Eduardo, Pozo López, Gabriela del Valle, Urreta, Silvia Elena, Fabietti, Luis María Rodolfo
Formato: article
Lenguaje:Inglés
Publicado: 2021
Materias:
Ni2MnGa alloy
Ultra rapid solidification
Magnetic shape memory
Martensitic transformation
Acceso en línea:http://hdl.handle.net/11086/20785
https://doi.org/10.1016/j.mspro.2015.04.111
Aporte de:
Repositorio Digital Universitario (UNC) de Universidad Nacional de Córdoba
id I10-R141-11086-20785
record_format dspace
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-141
collection Repositorio Digital Universitario (UNC)
language Inglés
topic Ni2MnGa alloy
Ultra rapid solidification
Magnetic shape memory
Martensitic transformation
spellingShingle 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
topic_facet Ni2MnGa alloy
Ultra rapid solidification
Magnetic shape memory
Martensitic transformation
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
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 2021
url http://hdl.handle.net/11086/20785
https://doi.org/10.1016/j.mspro.2015.04.111
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