METHOD OF DETERMINING VISCOSITY OF MICRO DESTRUCTION OF THIN AMORPHOUS-NANOCRYSTALLINE FILMS Russian patent published in 2019 - IPC G01N3/42 B82Y35/00 

FIELD: test technology.

SUBSTANCE: invention relates to investigation and analysis of plastic properties of thin tapes of amorphous multicomponent metal alloys after their transition from amorphous to amorphous-nanocrystalline state as a result of heat treatment. A preliminary first series of tests of one sample with different load is performed, on the basis of which the optimum indenter indentation force is determined in the sample, at which the probability of occurrence of the characteristic micro destruction pattern is maximum. Preliminary second series of tests is carried out with optimum value of load on another sample to determine minimum allowable distance of tests between points of indentation and edge of analyzed sample, at which characteristic pattern of micro destruction is manifested. A series of basic samples of a thin amorphous metal strip is made, an amorphous-nanocrystalline structure is formed in them by controlled heat treatment, placing on substrates from metal and polymer composite material, investigating viscosity of micro destruction by inducing indenter sample in form of Vickers pyramid with load, speed and time of action on sample, which enable to provoke occurrence of group of cracks in form of system of embedded squares, calculation of micro destruction viscosity based on data on average distances between two parallel cracks in group of cracks formed in sample after test.

EFFECT: possibility of reliable calculation of viscosity coefficient of micro destruction of materials at minimum number of samples and, accordingly, reducing time consumption of materials for analysis and improving accuracy of calculations.

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