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Transition from Grey to White and White to Grey in Fe-C-X Eutectic Alloys

Published online by Cambridge University Press:  21 February 2011

P. Magnin  and
W. Kurz
P. Magnin
Affiliation:
Swiss Federal Institute of Technology/Ch. de Bellerive 34, 1007 Lausanne
W. Kurz
Affiliation:
Swiss Federal Institute of Technology/Ch. de Bellerive 34, 1007 Lausanne
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Abstract

The effect of small additions of Si, P, Cr, Mn and Ti on transition velocities from grey to white and white to grey of pure Fe-C eutectics has been measured by varying growth rates in directional solidification experiments. Growth undercoolings were measured as a function of growth rate, while white and grey eutectic temperatures were obtained from DTA experiments. As a result of these experiments, alloying elements can be classified into three categories : graphitizing (Si, P), carburizing (Cr) and “opposite effect” (Mn, Ti). Each category is characterized by a given influence on eutectic temperature, growth undercooling, and nucleation of cementite. A qualitative model which permits determination of the influence of alloying elements on these latter three parameters is proposed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 34: Symposium – Physical Metallurgy of Cast Iron , 1984 , 263
Copyright
Copyright © Materials Research Society 1985

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References

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