Approaches to minimizing porosity in the casting of large-sized gas turbine blades

Part 1
Yakovlev E. I.
UDC
621.74.04
DOI
10.18577/2307-6046-2026-0-2-49-57
Article PDF (Russian) (642.21 KB)
How to cite
Yakovlev E. I. Approaches to minimizing porosity in the casting of large-sized gas turbine blades. Part 1 // Proceedings of VIAM. 2026. No. 2. DOI: 10.18577/2307-6046-2026-0-2-49-57. URL: https://test.viam.ru/en/journal/2026/2/5
Keywords
large-sized cast turbine blades, equiaxed structure, porosity, casting feed, casting modes, gas turbine installation
Abstract

In cast blades with an equiaxed structure, one of the key defects is shrinkage porosity, which acts as a stress concentrator and reduces both the material properties and the reliability of the blades. This defect is particularly pronounced in large-sized gas-turbine units and engines (GTU and GTE) blades, where conventional processing techniques fail to provide sufficient compensation for shrinkage during solidification. The first part of this article reviews the fundamental principles of existing theories on casting feeding. 

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