Titanium aluminides and precision cast articles made therefrom

Details Titanium aluminides and precision cast articles made therefrom Titanium aluminides and precision cast articles made therefrom

1991-07-30

1994-03-22

Roy, Upendra

Metal treatment

Stock

Titanium, zirconium, or hafnium base

148669, 420417, 420420, 420421, C22C 1400

Patent

active

052960552

ABSTRACT:
A titanium aluminide is composed of 31 to 34 mass % of Al, 1.5 to 3.0 mass % of Fe, 0.5 to 2.0 mass % of V, 0.18 to 0.35 mass % of B with remainder being Ti and inevitable impurities. The 0.5 to 2.0 mass % of V may be replaced with a 1.0 to 3.0 mass % of Mo or a 0.3 to 1.5 mass % of Cr. By precision casting this alloy, a novel titanium aluminide alloy is obtained in which numerous whisker-like Ti--B compound are uniformly dispersed. The titanium aluminide alloy does not possess a coarse lamellar structure which would cause cracking.

REFERENCES:
patent: 4294615 (1981-10-01), Blackburn et al.
patent: 4857268 (1989-08-01), Huang
patent: 5098653 (1992-03-01), Chin
Vujic et al Met. Trans. 19A (1988) 2445.

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