Improvement of casting technology and composition of single crystal blades made of heat-resistant intermetallic alloy

Gerasimov V. V., Petrushin N.V., Visik E.M.
Gerasimov V. V., Petrushin N.V., Visik E.M. Improvement of casting technology and composition of single crystal blades made of heat-resistant intermetallic alloy // Proceedings of VIAM. 2015. No. 3. DOI: 10.18577/2307-6046-2015-0-3-1-1. URL: https://test.viam.ru/en/journal/2015/3/1
Abstract

CAD was used to improve chemical composition of single crystal intermetallic Ni-based superalloy with crystallographic orientation (CGO) providing an attractive combination of operation properties: density – 8,0 g/cm3; long-term strength \( \sigma^{1100}_{100} = 130~\text{MPa} \) at 1100°C and \( \sigma^{1200}_{100} = 53~\text{MPa} \) at 1200°C and σ-1 \( \sigma^{900} = 370~\text{MPa} \) at 900°C on the base of \( 2 \cdot 10^{7} \) cycles. The process parameters for casting of uncooled single crystal small-sized rotor blades of GTE with CGO from the above alloy were developed. Experimental lots of uncooled small-sized rotor blades were produced with the single crystal structure yield at least 95% under conditions of pilot production at VIAM and 80% - under industrial conditions.

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