Low density heat resistant intermetallic alloys of the Al.sub.3 Ti type
AssigneeTechnology Development Corporation
InventorDonald E. Nikkola
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Abstract
Low density, high temperature and aluminum-rich intermetallic alloys displaying excellent elevated temperature properties, including oxidation resistance, are disclosed. Based on the aluminum/titanium system, specifically modifications of Al.sub.3 Ti compositions, useful alloys are derived from changes in crystal structure and properties effected by selected-site substitution alloying with manganese and/or chromium, and, where used, vanadium, or equivalent site-substituting alloying elements.
Claims11
A low density heat resistant aluminum-titanium alloy composition comprising from about 15 to about 35 atomic percent titanium, from about 3 to about 15 atomic percent manganese, or chromium, or combinations of manganese and chromium, and the balance substantially aluminum.
A low density heat resistant aluminum-titanium alloy composition comprising from about 15 to about 35 atomic percent titanium, from about 3 to about 15 atomic percent of manganese, or chromium, or combinations of manganese or chromium, and up to about 9 atomic percent of at least one element selected from the group consisting of Zr, Hf, Nb, Ta, Mo and W, and the balance substantially aluminum.
Dependencies are inferred from the claim text.