Published April 15, 2008 | Version v1
Journal article Metadata-only

Martensitic transformation in Ni-Fe-Ga alloys

Creators

  • 1. Universidad del Pais Vasco, Dpto. Electricidad y Electronica, P.O. Box 644, E-48080 Bilbao (Spain)
  • 2. Institute of Magnetism, Kyiv 03142 (Ukraine)
  • 3. Universitat de les Illes Balears, Departament de Fisica, E-07071 Palma de Mallorca (Spain)
  • 4. National Institute of Advanced Industrial Science and Technology, Sendai 983-8551 (Japan)
  • 5. Department of Applied Physics, Tohoku Gakuin University, Tagajo 985-8537 (Japan)

Description

Fe-based ferromagnetic shape memory alloys have attractive mechanical properties as compared with the classical Ni2MnGa ones, because of their enhanced ductility. This opens new possibilities regarding technical applications as magnetic sensors or actuators. In this work, we present a multiple technique study of the martensitic transformation in alloys with nominal composition Ni55-xFe19+xGa26 (x = 0, 1, and 2) transforming close to room temperature. Magnetic characterisations, performed in a SQUID magnetometer and by AC methods show the Curie temperature (TC ∼ 300 K) increasing with Fe content while the martensitic temperature (TM ∼ 240 K) decreases, in agreement with DSC and resistivity measurements. In addition, several Curie temperatures are found by the magnetic measurements, indicating the coexistence of different phases in the alloy. Neutron diffraction study suggests the L21-ordered cubic phase for austenite and 14 M structure for the martensitic phase. The transformation is observed from the temperature evolution of the diffraction peaks

Availability note (English)

Available from http://dx.doi.org/10.1016/j.msea.2007.05.097

Additional details

Identifiers

DOI
10.1016/j.msea.2007.05.097;
PII
S0921-5093(07)01113-6;

Publishing Information

Journal Title
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Journal Volume
478
Journal Issue
1-2
Journal Page Range
p. 125-129
ISSN
0921-5093
CODEN
MSAPE3

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39068845
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
AUSTENITE; CALORIMETRY; CURIE POINT; DUCTILITY; ELECTRIC CONDUCTIVITY; GALLIUM ALLOYS; MAGNETOMETERS; MARTENSITE; NEUTRON DIFFRACTION; NICKEL ALLOYS; PHASE TRANSFORMATIONS; SHAPE MEMORY EFFECT; SQUID DEVICES; TEMPERATURE RANGE 0273-0400 K
Descriptors DEC
ALLOYS; CARBON ADDITIONS; COHERENT SCATTERING; DIFFRACTION; ELECTRICAL PROPERTIES; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; IRON ALLOYS; MEASURING INSTRUMENTS; MECHANICAL PROPERTIES; MICROWAVE EQUIPMENT; PHYSICAL PROPERTIES; SCATTERING; SUPERCONDUCTING DEVICES; TEMPERATURE RANGE; TENSILE PROPERTIES; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT ALLOYS; TRANSITION TEMPERATURE

Optional Information

Copyright
Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.