High-gradient directional solidification of intermetallic Ni–Al–Ta alloy based on Ni3Al, strengthened by TaC-phase

Petrushin N.V., Elyutin E.S., Raevskih A.N., Treninkov I.A.
UDC
669:018.44:669.245
DOI
10.18577/2307-6046-2017-0-3-1-1
Article PDF (Russian) (1011.16 KB)
How to cite
Petrushin N.V., Elyutin E.S., Raevskih A.N., Treninkov I.A. High-gradient directional solidification of intermetallic Ni–Al–Ta alloy based on Ni3Al, strengthened by TaC-phase // Proceedings of VIAM. 2017. No. 3. DOI: 10.18577/2307-6046-2017-0-3-1-1. URL: https://test.viam.ru/en/journal/2017/3/1
Keywords
Ni3Al
Abstract

Directional solidification of process of experimental intermetallic Ni3Al-based alloy of quaternary system Ni–7Al–13,5Ta–0,07С (wt. %) has been investigated. Phase composition of the alloy is γʹ+γ+MC. Directionally solidified as cylindrical bars of Ni3Al-based alloy were successfully grown with a Bridgman process by slow directional solidification (R=6 mm/h) with high thermal gradient (G=12°C/mm). Studied macrosegregation elements and influence macrosegregation on the physicochemical and structural parameters of directionally solidified intermetallic Ni3Al-based alloy (solidus temperature, liquidus temperature, γ- and γ′-lattice parameters and γ/γ′-lattice misfit).

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