Titanium base alloy for superplastic forming

Details Titanium base alloy for superplastic forming Titanium base alloy for superplastic forming

1989-11-30

1990-07-31

Roy, Upendra

Alloys or metallic compositions

Titanium base

Aluminum containing

148 115F, 148 127B, 148133, 148421, C22C 1400

Patent

active

049449141

ABSTRACT:
The invention provides a titanium alloy having improved superplastic forming characteristics and mechanical characteristics. A titanium alloy having superplastic forming characteristics consisting essentially of about 5.5 to 6.75 wt. % Al, 3.5 to 4.5 wt. % V, 0.01 to 0.2 wt. % O, 0.85 to 3.15 wt. % Fe, 0.85 to 3.25 wt. % Mo, with 2.times.Fe wt. %+Mo wt. % being from 3 to 8, and balance titanium; said alloy containing .alpha.-crystals having a grain size below about 6 .mu.m in diameter. The Fe and Mo act as .beta.-stabilizing elements and contributing elements to lowering the beta transus and to the improvement of the superplastic characteristics.

REFERENCES:
patent: 4299626 (1981-11-01), Paton et al.
patent: 4886559 (1989-12-01), Shindo et al.
Ghosh et al., Met. Trans. 13A (May 1982) 733.
Wert et al., Met. Trans. 14A (Dec. 1983) 2535.
Leader et al., Met Trans. 17A (Jan. 1986) 93.

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