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An experimental study and a thermodynamic evaluation of the cr- fe- w system

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Abstract

An experimental study of the Cr-Fe-W system has been made using a diffusion couple technique. A number of tie-lines have been determined using a scanning electron microscope with energy dispersive X-ray analysis equipment. The structures of the observed intermetallic phases were determined by means of X-ray diffraction. The experimental results are presented in tables and isothermal sections at 1173, 1273, 1373, 1473, 1573, and 1673 K. A thermodynamic evaluation has been made using a magnetic subregular model for the bcc and fcc solution phases, a multi-sublattice model for the intermetallic phases, and an ordinary subregular solution model for the liquid phase. The parameter values describing the Gibbs energy of each individual phase have been determined by means of a computerized optimization technique. The calculated sections of the Cr-Fe-W phase diagram are in satisfactory agreement with the experimental information.

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  1. Swedish Institute for Metals Research, S-11428, Stockholm, Sweden

    Per Gustafson

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  1. Per Gustafson
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Formerly with the Division of Physical Metallurgy, Royal Institute of Technology, Stockholm, Sweden

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Gustafson, P. An experimental study and a thermodynamic evaluation of the cr- fe- w system. Metall Trans A 19, 2531–2546 (1988). https://doi.org/10.1007/BF02645481

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