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Papers by Оleksandr Dubovoy

Вісник Харківського національного автомобільно-дорожнього університету, Збірка наукових праць. Харків, вип. 82. С. 92-97., 2018

Problem. Increasing the physical and mechanical properties of materials by nanostructurization is... more Problem. Increasing the physical and
mechanical properties of materials by nanostructurization is the main problem of modern material science. Combination of previous deformation by 70 % and the following pre-recrystallization heat treatment
of metals and alloys is the effective way of improving
properties. Yet this method has some disadvantages.
The main shortcoming of this is small exposure time.
It does not allow the usage of this method for manufacture of massive parts of machines and mechanisms. Goal. Researching the influence of combined
deformation and subsequent pre-recrystallization
heat treatment on the hardness and substructure of
40X and 12X13 alloyed steels. Methodology. Methods of computer metallography were used. The XRay methods were used to determine the size of coherent scattering areas, quantity of nanoscale subgrains and the angle of orientation of subgrains. Results. The hardness of examples increases with the increasing angle of orientation after prerecrystallization heat treatment. Originality. The possibility of thermal stabilization of poligonization substrucrure by combined deformation by 60 % and
the following pre-recrystallization heat treatment
was established. Practical value. The possibility of
using pre-recrystallization heat treatment for details
of overall dimensions was created.

Вісник Харківського національного автомобільно-дорожнього університету, Збірка наукових праць. Харків, вип. 82. С. 92-97., 2018

Problem. Increasing the physical and mechanical properties of materials by nanostructurization is... more Problem. Increasing the physical and
mechanical properties of materials by nanostructurization is the main problem of modern material science. Combination of previous deformation by 70 % and the following pre-recrystallization heat treatment
of metals and alloys is the effective way of improving
properties. Yet this method has some disadvantages.
The main shortcoming of this is small exposure time.
It does not allow the usage of this method for manufacture of massive parts of machines and mechanisms. Goal. Researching the influence of combined
deformation and subsequent pre-recrystallization
heat treatment on the hardness and substructure of
40X and 12X13 alloyed steels. Methodology. Methods of computer metallography were used. The XRay methods were used to determine the size of coherent scattering areas, quantity of nanoscale subgrains and the angle of orientation of subgrains. Results. The hardness of examples increases with the increasing angle of orientation after prerecrystallization heat treatment. Originality. The possibility of thermal stabilization of poligonization substrucrure by combined deformation by 60 % and
the following pre-recrystallization heat treatment
was established. Practical value. The possibility of
using pre-recrystallization heat treatment for details
of overall dimensions was created.

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