Heat-resistant TiAl alloy excellent in room-temperature fracture

Details Heat-resistant TiAl alloy excellent in room-temperature fracture Heat-resistant TiAl alloy excellent in room-temperature fracture

1989-08-03

1991-01-08

Dean, R.

Alloys or metallic compositions

Titanium base

Aluminum containing

420580, C22C 1400, C22C 3000

Patent

active

049833570

ABSTRACT:
A heat-resistant TiAl alloy having excellent room-temperature fracture toughness, high-temperature oxidation resistance and high-temperature strength is disclosed. Said alloy consists essentially of from 29 to 35 wt. % aluminum, from 0.5 to 20 wt. % nobium, and at least one element selected from the group consisting of from 0.1 to 1.8 wt. % silicon, and from 0.3 to 5.5 wt. % zirconium, the balance being titanium and incidental impurities. Preferably impurities are limited to 0.6 wt.-% oxygen, 0.1 wt.-% nitrogen and 0.5 wt.-% hydrogen.

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Chem Abstracts 65:16627h 8/65 "Forgeable High-Temperature Resistant Alloys".
Joseph B. McAndrew et al. JOM 206; 10/56 pp. 1348-1353 "Ti-36 Pct Al as a Base for High Temperature Alloys".
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Chem. Abstracts 65: 16628a 8/65, Forgeable High-Temperature Resistant Titanium Alloys.
Murray, "Phase Diagrams of Binary Titanium Alloys" (1987), pp. 12-24.
Nishiyama et al "Development of a Titanium Aluminide Turbocharger Rotor", International Gas Turbine Congress Paper, Tokyo, (1987), pp. III-263-270, 10/87.

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