alloy for titanbasis for superplastische design.

摘要

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 2xFe 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. Both Fe and Mo act as beta -stabilizing elements and contribute to lowering of the beta transus temperature and to the improvement of the superplastic properties.