METHOD FOR COMPLEX ASSESSMENT OF MATERIAL INHOMOGENEITY Russian patent published in 2024 - IPC G01N19/08 G01N23/225 

FIELD: measurement.

SUBSTANCE: invention relates to research or analysis of materials. Analytical sample is made in the form of thin sections of samples, on which areas for analysis are selected. Virtual coordinate grid is formed on the area. In its nodes (points) imprints are made by an indenter. Geometric axis of the analytical signal excitation region is aligned with the axis of the imprint. Size of the excitation region of the analytical signal in each imprint is varied, which corresponds to the step of its deepening. Analytical signal spread statistical indices are calculated: average values N of the content of chemical elements, root-mean-square deviations RMSD, variation coefficients V, as indices of inhomogeneity in individual points, lines and a set of lines depending on the dimensions of the excitation region of the analytical signal. Coupling equations and correlation coefficients of chemical composition and hardness of the material, which characterize chemical and micromechanical inhomogeneity, are calculated.

EFFECT: possibility of accurate alignment of electron beam axis with hardness imprint axis, while increasing accuracy of determining degree of chemical and micromechanical heterogeneity of material and increasing information content in quantitative determination of degree of heterogeneity of any structural material.

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