Metalographic determination of the size of grain of primary austinitis in dispersion of the products of martensite transformation
DOI:
https://doi.org/10.30838/J.PMHTM.2413.250918.41.397Keywords:
metallography methodology, martensite, size of grain of austeniteAbstract
Abstract. The aim of the work is to create a new technique that allows a simple method to determine the effective diameter of austenite primary grain and the morphology of martensitic grain-boundary structure hardened on lath martensite of low-carbon steels. Techniques. The methods of theoretical, crystallographic, stereographic and topological analyzes and quantitative metallography were used. Results. It is shown that the boundaries between martensite crystals in packages and between packages can be low-energy with rather large elementary faces through which dislocations penetrate when the slip lines pass from one grain to another. Scientific novelty. For the first time, a relationship has been established between the sizes of martensitic plates and the size of the former austenitic grain. Practical value. The developed technique can be used for research purposes and in the industrial conditions of metallurgical and rolling productions.
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