Phase Transformation Study of Aluminium Containing Ductile irons by Dilatometry

Ali-Reza Kiani-Rashid 

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

Abstract

The temperature for the start of martensite formation (MS) for three Al-alloyed ductile irons containing 0.48%Al, 4.88%Al and 6.16%Al were determined by high-speed dilatatometry. Microscopic observation and hardness measurements also were used to indicate the effects of aluminium addition on the martensite transformation during quenching. The examination confirmed that an austenite/martensite transformation occurs for irons containing 4.88%Al and less. The results indicate that martensitic transformation occurs at about 173°C for 0.48%Al and 4.88%Al. Whereas there was no evidence of the martensitic transformation for 6.16% Al .

Keywords: Phase transformation, Dilatometry, Ductile iron, Aluminium, Martensite

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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: 2006-01-28 18:54
Revised:   2009-06-07 00:44
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