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A whole pattern iterative refinement method for powder X-ray diffraction spectra of two-phase coherent alloys

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Abstract

An iterative refining method using FullProf software (Rietveld refinement) as a multi-input–output black-box with cyclic feedback is proposed in order to accurately measure the lattice misfit in two-phase coherent alloys. The method uses two X-ray diffraction spectra taken on the same powder sample. In addition, it requires the volumetric fraction of the phases and the size of the crystallite in the precipitated phase as derived from the measurements made by the transmission electron microscopy–energy dispersive spectroscopy technique. The measurement of the lattice misfit in a Fe2AlV-strengthened ferritic Fe76Al12V12 alloy is shown as an application of the method.

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Acknowledgements

The authors wish to thank Dr. Daniel Vega for the services provided by the Difracción de Rayos X Laboratory, Física de la Materia Condensada Department, Gerencia de Investigaciones y Aplicaciones, GAIyANN-CAC-CNEA. PAF was supported by a Comisión Nacional de Energía Atómica (CNEA) professional fellowship.

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Authors and Affiliations

  1. Gerencia Materiales (GAEN), Comisión Nacional de Energía Atómica (CNEA), Instituto Sabato, Universidad Nacional de San Martín (UNSAM), Av. Gral. Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina

    P. A. Ferreirós & G. H. Rubiolo

  2. Facultad Regional General Pacheco (UTN-FRGP), Universidad Tecnológica Nacional, Av. Hipólito Yrigoyen 288, B1617FRP, Gral. Pacheco, Buenos Aires, Argentina

    P. A. Ferreirós

  3. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, C1425FQB, Ciudad Autónoma de Buenos Aires, Argentina

    G. H. Rubiolo

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  1. P. A. Ferreirós
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  2. G. H. Rubiolo
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Correspondence to P. A. Ferreirós.

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Ferreirós, P.A., Rubiolo, G.H. A whole pattern iterative refinement method for powder X-ray diffraction spectra of two-phase coherent alloys. J Mater Sci 53, 2802–2811 (2018). https://doi.org/10.1007/s10853-017-1682-5

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  • DOI: https://doi.org/10.1007/s10853-017-1682-5

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