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US 9,957,836 B2Granted
Titanium alloy having good oxidation resistance and high strength at elevated temperatures
AssigneeRTI International Metals, Inc.
InventorsFusheng Sun, Ernest M. Crist, Kuang-O Yu
Life of this patent
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Abstract
A titanium alloy may be characterized by a good oxidation resistance, high strength and creep resistance at elevated temperatures up to 750° C., and good cold/hot forming ability, good superplastic forming performance, and good weldability. The alloy may contain, in weight percent, aluminum 4.5 to 7.5, tin 2.0 to 8.0, niobium 1.5 to 6.5, molybdenum 0.1 to 2.5, silicon 0.1 to 0.6, oxygen up to 0.20, carbon up to 0.10, and balance titanium with incidental impurities.
Claims23
A high temperature titanium alloy comprising:
- 5.0 to 7.0% aluminum by weight;
- 3.0 to 6.0% tin by weight;
- 2.5 to 6.0% niobium by weight;
- 0.1 to 1.5% molybdenum by weight;
- 0.1 to 0.6% silicon by weight
- zirconium below 0.1% by weight;
- no more than 0.20% oxygen;
- no more than 0.10% carbon;
- iron, nickel, chromium, copper and manganese are each below 0.1% by weight and a total of <0.3 combined;
- hafnium and rhenium in a range of 0.0 to 0.3% by weight and <0.3 combined and
- a balance titanium.
8 more elements
A high temperature titanium alloy comprising:
- 5.0 to 7.0% aluminum by weight;
- 3.0 to 6.0% tin by weight;
- 2.5 to 6.0% niobium by weight;
- 0.1 to 1.5% molybdenum by weight;
- 0.1 to 0.6% silicon by weight;
- zirconium below 0.1% by weight;
- a total of zirconium and vanadium in a range of 0.0 to 0.5% by weight;
- a total of hafnium and rhenium in a range of 0.0 to 0.3% by weight;
- and a balance titanium.
6 more elements
Dependencies are inferred from the claim text.