Research of causes of destruction of the impeller and fan wheel from alloy AK4-1

Morozova L.V., Grigorenko V.B.
UDC
620.1:669.715
DOI
10.18577/2307-6046-2018-0-6-119-127
Article PDF (Russian) (1.01 MB)
How to cite
Morozova L.V., Grigorenko V.B. Research of causes of destruction of the impeller and fan wheel from alloy AK4-1 // Proceedings of VIAM. 2018. No. 6. DOI: 10.18577/2307-6046-2018-0-6-119-127. URL: https://test.viam.ru/en/journal/2018/6/12
Keywords
destruction, destruction surface, aluminum alloy, fatigue, fractography.
Abstract

Complex research of two cases of operational destructions of details of difficult configuration from alloy AK4-1 (impellers and fan wheels) is conducted. By methods of optical and electron microscopy, chemical analysis and mechanical tests it is evaluated macro- and microstructure, chemical composition and nature of destruction of details is studied. It is established that destruction of the impeller and wheel of the fan has occurred at action of cyclic load. Destruction of details was promoted by availability of rough surface and micro damages (scratches from machining) in zone of the increased tension.

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