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Vol 12, Issue 1, 2018
Pages: 84 - 89
Research article
Metallic materials
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Published: 04.09.2018. Research article Metallic materials

INFLUENCE OF HEATING RATE ON STABILITY OF AUSFERRITE MICROSTRUCTURE

By
Hasan Avdušinović ,
Hasan Avdušinović
Contact Hasan Avdušinović

Faculty of Metallurgy and Technology Travnička cesta 1, Zenica, University of Zenica , Zenica , Bosnia and Herzegovina

Almaida Gigovic-Gekic ,
Almaida Gigovic-Gekic

Faculty of Metallurgy and Technology Travnička cesta 1, Zenica, University of Zenica , Zenica , Bosnia and Herzegovina

Šehzudin Dervišić
Šehzudin Dervišić

Livnica Turbe, Pobjeda d.d Tešanj Travnik , Travnik , Bosnia and Herzegovina

Abstract

Austempered Ductile Iron (ADI) is obtained by exactly controlled heat treatment process of nodular cast iron. Ductile iron samples are first austenitised to dissolve carbon, then quenched rapidly to the austempering temperature to avoid the formation of deleterious pearlite or martensite. Resulting ausferrite microstructure consists of acicular ferrite embedded in stabile retained austenite. A new microstructure results with capability superior to many traditional, high performance, ferrous and aluminum alloys. Influence of heating rate on stability during working life of ADI casting, using thermal analysis (DTA), is presented in this paper.

References

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R. KJ, L HK. Designing with Austempered Ductile Iron (ADI. In: AFS Proceedings 2010. 2010. p. 1 15,.
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M. O, A B. Nodularni liv, Fakultet za metalurgiju i materijale. 2008;
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Avdušinović H. Gigović A.: Heat Treatment of Nodular Cast Iron. In: TMT Proceedings. 2009. p. 669-672,.
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