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The article presents the results of computer quantitative analysis of the microstructure of ductile cast iron heat treated with isothermal transformation. To determine the relative volume fraction of austenite and the geometric parameters of ferrite needles the methods of image analysis were used. Analysis of the effect of temperature and time of austempering on the volume fraction of austenite and the dimensions of the ferrite needles was carried out.
Keywords: Austempered ductile iron (ADI), image analysis© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.