Heat treatable Ti-Al-Nb-Si alloy for gas turbine engine
AssigneeThe Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
InventorsStephen Kerry, James E. Restall, deceased, Michael I. Wood
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Abstract
Heat treatable titanium alloys of the Ti.sub.3 Al type comprise 20 to 23 Al - 9 to 15 Nb-0.5 to 1.0 Si balance essentially T; (at %). These alloys exhibit a good balance of properties at room temperature and at high temperature (600.degree. C. plus) especially when solution treated in the .beta. field and artifically aged. Zr, V and Mo can be included in the alloys.
Claims10
A heat-treatable titanium alloy which is suitable for use as components in the compressor section of a gas turbine engine and which is based on or contains the intermetallic phase Ti.sub.3 Al, consisting essentially of the following constituents in atomic proportions:
- 20 to 23% aluminum
- 9 to 15% niobium
- 0.5 to 1.0% silicon
- 0 to 3% zirconium
- 0 to 3% vanadium
- 0 to 3% molybdenum
- balance essentially titanium;
- and wherein the proportion of optional constituents from the group consisting of zirconium, vanadium and molybdenum, when two or more are present in combination, is up to 5 atomic percent.
Dependencies are inferred from the claim text.