Influence of sea water on fatigue limit of alloy VT3-1 at different load ratio

Ospennikova O.G., Naprienko S.A., Avtaev V.V.
UDC
620.1:669.295
DOI
10.18577/2307-6046-2019-0-1-115-124
Article PDF (Russian) (1006.69 KB)
How to cite
Ospennikova O.G., Naprienko S.A., Avtaev V.V. Influence of sea water on fatigue limit of alloy VT3-1 at different load ratio // Proceedings of VIAM. 2019. No. 1. DOI: 10.18577/2307-6046-2019-0-1-115-124. URL: https://test.viam.ru/en/journal/2019/1/12
Keywords
titanium alloys, corrosion cracking, cyclic compression, scanning electron microscopy, fractography.
Abstract

On specially developed samples of VT3-1 alloy, it was experimentally established that the sea water leads to an increase of fatigue limit under symmetrical loading cycle, under conditions of cyclic stretching and cyclic compression.

By the method of scanning electron microscopy it was found that under the conditions of cyclic compression the development of fatigue cracks is accompanied by the formation of a faceted relief of the forming trickle with longitudinal folds. When tested in sea water facets have a fragile appearance, while in the air on their surface there are signs of plastic deformation. With a symmetrical loading cycle and cyclic stretching, fatigue grooves are formed in sea water, as in the air atmosphere.

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