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Partition of alloying elements on eutectic solidification of cast iron

Published online by Cambridge University Press:  21 February 2011

Akio Kagawa and
Taira Okamoto
Akio Kagawa
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567, Japan
Taira Okamoto
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567, Japan
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Abstract

The coefficients for partition of an alloying element (X) between austenite and liquid iron (), and between eutectic liquid and its solid (PS and PM in the stable and metastable eutectic solidifications, respectively) have been investigated thermodynamically. The coefficientdepended significantly on the interaction between carbon and the element X. A simplified method for the evaluation ofwas introduced from the thermodynamic analysis of factors influencing on . The coefficients, PS and PM, calculated fromand the coefficient for partition of the element X between cementite and ausfenite, agreed well with those obtained experimentally. It was indicated from the thermodynamic stability for the coexisting phases that the effect of an alloying element on graphitization occurring during eutectic solidification wvs closely related to the values of Δ(+PM-PS and and also to the effect of the element on the difference between the stable and metastable eutectic temperatures. No strict relation was found between the effects of an alloying element on the carbon activity in liquid iron and on the graphitization.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 34: Symposium – Physical Metallurgy of Cast Iron , 1984, 201
Copyright
Copyright © Materials Research Society 1985

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References

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