Paper Title:
Interfacial Reactions during the Dissolution of Titanium in Liquid Iron
  Abstract

The interfacial reactions between a solidified Fe shell and Ti were investigated within the framework of steel alloying. Ti cylinders were immersed into liquid Fe for various durations and subsequently water-quenched. An Fe shell solidifies around the Ti. At the interface between Fe and Ti a reaction zone is formed. Initially it consists of a liquid eutectic layer, though in later stages all stable phases at elevated temperature can be found in the quenched microstructure. The larger part of this reaction zone is fluid at high temperature and both Ti and Fe dissolve into it. Moreover, intermetallic compound formation and mixing of Fe and Ti generate extra heat, shortening the time required for shell melt-back. The reaction zone reaches thicknesses up to 40 % of the initial sample’s radius and when the shell has completely remolten, a discontinuity in the thickness-time profile is expected. The exact morphology of the reaction zone at high temperature remains to be determined: presence of a solid layer of Fe2Ti may impede mixing in the initial stages.

  Info
Periodical
Defect and Diffusion Forum (Volumes 273-276)
Edited by
Andreas Öchsner and Graeme E. Murch
Pages
467-473
DOI
10.4028/www.scientific.net/DDF.273-276.467
Citation
L. Pandelaers, F. Verhaeghe, B. Blanpain, P. Wollants, "Interfacial Reactions during the Dissolution of Titanium in Liquid Iron ", Defect and Diffusion Forum, Vols. 273-276, pp. 467-473, 2008
Online since
February 2008
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Price
$32.00
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