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Mössbauer Spectroscopy, Dilatometry and Neutron Diffraction Detection of the ɛ-Phase Fraction in Fe–Mn Shape Memory Alloys

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Abstract

The results of a Mössbauer spectroscopy (MS) and a neutron diffraction (ND) study carried out on a set of Fe–Mn alloys quenched from high temperatures are reported. Upon quenching the high temperature stable phase FCC (γ) together with metastably retained HCP-(ɛ) phase are formed. The lattice parameters obtained using ND are in excellent agreement with previous results of the literature. The phase fractions obtained from MS are coincident, within experimental errors, with those extracted from ND, with exception of the case of an alloy with the lowest Mn content (16.8 at.% Mn). That situation can be associated with the occurrence of a high density of stacking faults (SF) in the γ phase or to the presence of a paramagnetic γ phase. ɛ phase fractions obtained from MS and ND decrease smoothly with Mn content but are always larger than the values reported in literature resulting from dilatometry.

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Authors and Affiliations

  1. Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, IFLP-CONICET, C.C.6 7, 1900, La Plata, Argentina

    J. Martínez, S. M. Cotes & J. Desimoni

  2. Instituto Balseiro, Centro Atómico Bariloche, CNEA and CONICET, Avda. Bustillo 10000, 8400, S. C. de Bariloche, Argentina

    G. Aurelio & A. Fernández Guillermet

  3. Diffraction Group, Institut Laue-Langevin, 6 Rue Jules Horowitz, B.P. 15638042, Grenoble Cedex 9, France

    G. Cuello

Authors
  1. J. Martínez
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  2. G. Aurelio
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  3. G. Cuello
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  4. S. M. Cotes
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  5. A. Fernández Guillermet
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  6. J. Desimoni
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Correspondence to J. Desimoni.

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Martínez, J., Aurelio, G., Cuello, G. et al. Mössbauer Spectroscopy, Dilatometry and Neutron Diffraction Detection of the ɛ-Phase Fraction in Fe–Mn Shape Memory Alloys. Hyperfine Interact 161, 221–227 (2005). https://doi.org/10.1007/s10751-005-9194-0

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  • DOI: https://doi.org/10.1007/s10751-005-9194-0

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