Features of destruction of details of fixture from the constructional steel

Grigorenko V.B., Morozova L.V., Vinogradov S.S.
UDC
669.018.29:539.42
DOI
10.18577/2307-6046-2018-0-4-66-74
Article PDF (Russian) (1.21 MB)
How to cite
Grigorenko V.B., Morozova L.V., Vinogradov S.S. Features of destruction of details of fixture from the constructional steel // Proceedings of VIAM. 2018. No. 4. DOI: 10.18577/2307-6046-2018-0-4-66-74. URL: https://test.viam.ru/en/journal/2018/4/8
Keywords
constructional steel, fractography, scanning electronic microscopy, fatigue failure and intercrystalline brittleness.
Abstract

Features of destruction of samples from steel 30ХГСА with galvanotermic coatings on the basis of zinc are analyzed. At formation of a break of the samples tested for grain-boundary brittle destruction, three areas differing on a structure are created. In a near surface zone under a sheeting the area of the maleficiated relief with destruction on the mechanism of a viscous cut is formed. Further the area with a rough relief in which it is possible to allocate a zone of the slowed-down destruction with brittle facets and a zone viscous dimple rupture is created. It is established that when testing for low-cycle fatigue samples from steel 30ХГСА with galvanotermic coatings the centers of destruction are risks or other defects on a steel surface under a covering. In an focal zone the fan-shaped relief is most often observed. In process of removal from the center of destruction fatigue plateaus and grooves are created. In break viscous poles are formed. Research of the destroyed axis made

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