Heat-resistant nickel-based alloy for additive manufacturing

The nickel-based alloy with optimized composition and controlled impurities addresses low strength and crack issues, achieving high long-term strength and crack-free structures for gas turbine engine parts.

RU2865727C1Active Publication Date: 2026-07-08FEDERALNOE GOSUDARSTVENNOE UNITARNOE PREDPRIYATIE VSEROSSIJSKIJ NAUCHNO-ISSLEDOVATELSKIJ INST AVIATSIONNYKH MATERIALOV NATSIONALNOGO ISSLEDOVATELSKOGO TSENTRA KURCHATOVSKIJ INST (NITS KURCHATOVSKIJ INST - VIAM)
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Patent Information

Authority / Receiving Office
RU · RU
Patent Type
Patents
Current Assignee / Owner
FEDERALNOE GOSUDARSTVENNOE UNITARNOE PREDPRIYATIE VSEROSSIJSKIJ NAUCHNO-ISSLEDOVATELSKIJ INST AVIATSIONNYKH MATERIALOV NATSIONALNOGO ISSLEDOVATELSKOGO TSENTRA KURCHATOVSKIJ INST (NITS KURCHATOVSKIJ INST - VIAM)
Filing Date
2026-03-03
Publication Date
2026-07-08

AI Technical Summary

Technical Problem

Existing nickel-based alloys for additive manufacturing in gas turbine engines suffer from low creep rupture strength, reduced fatigue limit due to high oxygen content, and insufficient long-term strength in the temperature range of 800-1000°C, lacking effective control over structural cracks and impurity levels.

Method used

A nickel-based alloy with optimized chemical composition, including controlled oxygen content (≤0.015%), enhanced with elements like scandium, vanadium, and hafnium, forming stable γ'-phase and carbides, ensuring crack-free structures and increased long-term strength up to 1000°C.

Benefits of technology

The alloy achieves high long-term strength of at least 530 MPa at 800°C, 275 MPa at 900°C, and 120 MPa at 1000°C, with reduced impurities, enhancing the durability and service life of gas turbine engine parts.

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Abstract

FIELD: powder metallurgy.SUBSTANCE: heat-resistant nickel-based alloy intended for the manufacture of gas turbine engine parts with an operating temperature of up to 1000 °C using the additive manufacturing method. Heat-resistant nickel-based alloy for producing products by additive manufacturing contains, wt.%: cobalt 10.0–13.0, chromium 8.0–10.0, tungsten 4.0–8.0, molybdenum 2.0–6.0, aluminum 3.0–6.0, titanium 0.1–2.0, vanadium 0.1–1.0, tantalum 1.0–4.0, rhenium 0.5–3.0, hafnium 0.05–0.6, zirconium 0.01–0.1, scandium 0.009–0.05, carbon 0.01–0.3, boron 0.003–0.05, oxygen ≤ 0.015, sulfur ≤ 0.002, phosphorus ≤ 0.005, nickel – the base.EFFECT: elimination of fractures in products obtained from nickel-based alloys using additive manufacturing, a reduction in the content of harmful impurities in the form of sulfur and phosphorus, as well as an increase in long-term strength at high temperatures to values of at least σ100 = 530 MPa at temperature t = 800 °C, not less than σ100 = 275 MPa at temperature t = 900 °C and not less σ100 = 120 MPa at temperature t=1000 °C.1 cl, 2 tbl, 3 ex
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