Papers by Author: Andreas Pichler

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Authors: Andrej Samoilov, Yuri Titovets, Nikolay Y. Zolotorevsky, Gottfried Hribernig, Andreas Pichler
Abstract: An experimental study of Fe-C-Mn-Cr low-carbon steels with varying Cr content is presented. Pronounced bay and a near-stasis behavior were shown in the alloy with 1.1% Cr. Isothermal transformation at temperatures roughly between 500 and 600°C reveals two pronounced stages. SEM examination of the microstructures showed that the rapid first stage is controlled by carbide-free bainite formation while the slow second stage is controlled by a eutectoid-type reaction. Some microstructure features of the transformation were noted and discussed. Based on experimental observations, a model of austenite decomposition was developed to account for the main features of transformation kinetics in the alloys with varying Cr content.
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Authors: Andreas Pichler, M. Weller, E. Arzt, J. Diehl
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Authors: Andrej Samoilov, Yuri Titovets, Nikolay Y. Zolotorevsky, Gottfried Hribernig, Andreas Pichler
Abstract: The model of the γ→α transformation calculated with the CATRAN program is described. The expected effect of former austenite grain size on the transformation kinetics as well as the final microstructure is analyzed and compared with experimental data. The effect of austenite grain size distribution spread on the transformation kinetics is also considered and must be included as the additional input parameter in the computer model of austenite decomposition. In particular, probable variations of grain size non-uniformity should be taken into account when comparing transformation kinetics observed in the dilatometer experiment and under industrial conditions.
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