The Influence of Al Content on the Partial Fe-C-Si Equilibrium Phase Diagram

Ali-Reza Kiani-Rashid ,  David Edmons 

University of Sistan and Baluchestan, Dept. of Materials and Metallurgy Engineering, University of Sistan and Baluchestan, Zahedan 9816745563, Iran

Abstract

MTDATA software was used in order to gain an insight into the effects of alloying addition on the stability of the various phases that are in equilibrium in the materials under study. This was achieved by performing complex equilibria calculations to produce isoplethal sections of temperature against alloy concentration. Thermodynamic data were retrieved from databases appropriate to the experimental alloys compositions. After retrieval of the data, a range of temperature and composition was chosen for each calculation. By performing global Gibbs energy minimisation calculations, the stable phases in the temperature and composition were determined and plotted as isoplethal sections. It can be seen the aluminium content modifies the iron-carbon equilibrium at this alloy composition. The austenite region decrease with increasing Al content, and for cast iron containing about 4.88%Al or more, there is no evidence of austenite zone. However, there was a difference with observation for the 4.88%Al.

Keywords: Phase diagrams, MTDATA software, Austenite, Phase transformation

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  1. Phase Transformation Study of Aluminium Containing Ductile irons by Dilatometry

Presentation: Poster at E-MRS Fall Meeting 2006, Symposium I, by Ali-Reza Kiani-Rashid
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-01-29 13:09
Revised:   2009-06-07 00:44
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