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Title: Diffusion in the B2-b.c.c. phase of the Al-Fe-Ni system -- application of a phenomenological model

Abstract

A phenomenological model for multicomponent diffusion in B2-b.c.c. ordered phases is applied to the Al-Fe-Ni system. In the model, the activation energy for diffusion is expressed as a function of the degree of ordering, which is evaluated from thermodynamic data. These data are also used to evaluate the thermodynamic factors for diffusion. A CALPHAD-like assessment procedure is applied to the experimental data for diffusion in the B2-b.c.c. phase of the Al-Fe-Ni system. It is shown that the model is capable of representing the experimental data. The diffusivities from the model are used to simulate six different diffusion experiments. The results are compared with experimental data and it is concluded that the model yields satisfactory predictions.

Authors:
;  [1]
  1. Royal Inst. of Tech., Stockholm (Sweden). Div. of Physical Metallurgy
Publication Date:
OSTI Identifier:
684386
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: PBD: 8 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SELF-DIFFUSION; ALUMINIUM ALLOYS; IRON ALLOYS; NICKEL ALLOYS; COMPUTERIZED SIMULATION; VALIDATION

Citation Formats

Helander, T., and Aagren, J. Diffusion in the B2-b.c.c. phase of the Al-Fe-Ni system -- application of a phenomenological model. United States: N. p., 1999. Web. doi:10.1016/S1359-6454(99)00174-3.
Helander, T., & Aagren, J. Diffusion in the B2-b.c.c. phase of the Al-Fe-Ni system -- application of a phenomenological model. United States. doi:10.1016/S1359-6454(99)00174-3.
Helander, T., and Aagren, J. Wed . "Diffusion in the B2-b.c.c. phase of the Al-Fe-Ni system -- application of a phenomenological model". United States. doi:10.1016/S1359-6454(99)00174-3.
@article{osti_684386,
title = {Diffusion in the B2-b.c.c. phase of the Al-Fe-Ni system -- application of a phenomenological model},
author = {Helander, T. and Aagren, J.},
abstractNote = {A phenomenological model for multicomponent diffusion in B2-b.c.c. ordered phases is applied to the Al-Fe-Ni system. In the model, the activation energy for diffusion is expressed as a function of the degree of ordering, which is evaluated from thermodynamic data. These data are also used to evaluate the thermodynamic factors for diffusion. A CALPHAD-like assessment procedure is applied to the experimental data for diffusion in the B2-b.c.c. phase of the Al-Fe-Ni system. It is shown that the model is capable of representing the experimental data. The diffusivities from the model are used to simulate six different diffusion experiments. The results are compared with experimental data and it is concluded that the model yields satisfactory predictions.},
doi = {10.1016/S1359-6454(99)00174-3},
journal = {Acta Materialia},
number = 11,
volume = 47,
place = {United States},
year = {1999},
month = {9}
}