Tantalum and chromium containing titanium aluminide rendered cas

Details Tantalum and chromium containing titanium aluminide rendered cas Tantalum and chromium containing titanium aluminide rendered cas

1990-07-02

1992-03-24

Roy, Upendra

Alloys or metallic compositions

Titanium base

Aluminum containing

420417, 420590, 148421, C22C 1400

Patent

active

050986538

ABSTRACT:
A method for providing improved castability in a gamma titanium aluminide is taught. The method involves adding inclusions of boron to the titanium aluminide containing chromium and tantalum. Boron additions are made in concentrations between 0.5 to 2 atomic percent. Fine gain equiaxed microstructure is formed from solidified melt. Property improvements are also achieved.

REFERENCES:
patent: 3203794 (1965-08-01), Jaffee et al.
patent: 4537742 (1985-08-01), Siemers et al.
patent: 4661316 (1987-04-01), Hashimoto et al.
patent: 4897127 (1990-01-01), Huang
patent: 4915903 (1990-04-01), Brupbacher et al.
Wunderlich et al., Z. Metallkde, 81 (Nov. 1990) 802.

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