Heat resistant single crystal nickel-base super alloy

Details Heat resistant single crystal nickel-base super alloy Heat resistant single crystal nickel-base super alloy

1990-01-19

1990-12-11

Dean, R.

Metal treatment

Stock

Directionally solidified

148410, C22C 1905

Patent

active

049767917

ABSTRACT:
This invention relates to a heat resistant single-crystal nickel-base super alloy that possesses microstructural stability and excellent creep rupture strength and oxidation resistance. This alloy is composed of 4-9% chromium, 4-6.5% aluminum, 5-8.5% wolfram, 5-8.5% tantalum, 3-6% molybdenum, 0.01-0.30% hafnium, 0.02-4% cobalt by weight, and the balance of nickel and incidental elements and meets the conditional expression wolfram+tantalum<16%. The preferable chemcial composition of this alloy is approximately 6.4% chromium, approximately 5.1% aluminum, approximately 7.3% wolfram, 7.3% tantalum, approximately 4.3% molybdenum, approximately 0.1% hafnium, approximately 1% cobalt by weight, and the balance of nickel and incidental elements.

REFERENCES:
patent: 4116723 (1978-09-01), Gell et al.
patent: 4209348 (1980-06-01), Duhl et al.
patent: 4222794 (1980-09-01), Schweizer et al.
patent: 4402772 (1983-09-01), Duhl et al.

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