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Martensitic Transformation in Ni-Mn-Sn-Co Heusler Alloys

Thermal and structural austenite to martensite reversible transition was studied in melt spun ribbons of Ni50Mn40Sn5Co5, Ni50Mn37.5Sn7.5Co5 and Ni50Mn35Sn10Co5 (at. %) alloys. Analysis of X-ray diffraction patterns confirms that all alloys have martensitic structure at room temperature: four layered orthorhombic 4O for Ni50Mn40Sn5Co5, four layered orthorhombic 4O and seven-layered monoclinic 14M for Ni50Mn37.5Sn7.5Co5 and seven-layered monoclinic 14M for Ni50Mn35Sn5Co5. Analysis of differential scanning calorimetry scans shows that higher enthalpy and entropy changes are obtained for alloy Ni50Mn37.5Sn7.5Co5, whereas transition temperatures increases as increasing valence electron density

This research was supported by the projects MAT2013-47231-C2-2-P and 2014SGR1180

Metals, 2015, vol. 5, núm. 2, p. 695-705

MDPI (Multidisciplinary Digital Publishing Institute)

Author: Deltell, Àlex
Escoda i Acero, Ma. Lluïsa
Saurina i Canals, Joan
Suñol Martínez, Joan Josep
Date: 2015 June
Abstract: Thermal and structural austenite to martensite reversible transition was studied in melt spun ribbons of Ni50Mn40Sn5Co5, Ni50Mn37.5Sn7.5Co5 and Ni50Mn35Sn10Co5 (at. %) alloys. Analysis of X-ray diffraction patterns confirms that all alloys have martensitic structure at room temperature: four layered orthorhombic 4O for Ni50Mn40Sn5Co5, four layered orthorhombic 4O and seven-layered monoclinic 14M for Ni50Mn37.5Sn7.5Co5 and seven-layered monoclinic 14M for Ni50Mn35Sn5Co5. Analysis of differential scanning calorimetry scans shows that higher enthalpy and entropy changes are obtained for alloy Ni50Mn37.5Sn7.5Co5, whereas transition temperatures increases as increasing valence electron density
This research was supported by the projects MAT2013-47231-C2-2-P and 2014SGR1180
Format: application/pdf
ISSN: 2075-4701
Document access: http://hdl.handle.net/10256/10954
Language: eng
Publisher: MDPI (Multidisciplinary Digital Publishing Institute)
Collection: MINECO/PE 2014-2016/MAT2013-47231-C2-2-P
AGAUR/2014-2016/2014 SGR-1180
Reproducció digital del document publicat a: http://dx.doi.org/10.3390/met5020695
Articles publicats (D-F)
Is part of: Metals, 2015, vol. 5, núm. 2, p. 695-705
Rights: Attribution 4.0 Spain
Rights URI: http://creativecommons.org/licenses/by/4.0/es/
Subject: Aliatges amb memòria de forma
Shape memory alloys
Anàlisi tèrmica
Thermal analysis
Title: Martensitic Transformation in Ni-Mn-Sn-Co Heusler Alloys
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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