We propose a method for the computer-aided evaluation of the distribution of grains in sizes performed by analyzing metallographic images of the microstructure of 12Kh1MF steam-pipeline steel after operation. The samples of steel were cut out from the straight part and from the zone of tension in the bend of the main steam pipeline of a thermal power plant. It is shown that the degree of heterogeneity of the distribution of grain sizes in the straight part is lower than in the tensile zone of the bend. In approaching the outer and inner surfaces of the pipe, this characteristic decreases in the straight part but increases in the tensile zone of the bend, which is caused by the intense degradation of the material under severe operating conditions.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 55, No. 2, pp. 48–52, March–April, 2019.
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Zhuravel’, І.М. Computer Analysis of the Distribution of Grain Sizes in the Structure of 12Kh1MF Steel After Operation. Mater Sci 55, 187–192 (2019). https://doi.org/10.1007/s11003-019-00287-y
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DOI: https://doi.org/10.1007/s11003-019-00287-y