Elevated Temperature Aluminum-Titanium Alloy by Powder Metallurgy Process.
Patent, Filed 29 Jan 88, patented 30 May 89,
DEPARTMENT OF THE NAVY WASHINGTON DC
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An aluminum-titanium alloy and a process of making it, the alloy consisting essentially of aluminum, 4-6 wt. titanium, 1-2 wt. carbon, and 0.1-0.2 wt. oxygen. The alloy is an aluminum matrix supersaturated with titanium, and having throughout a fine, homogeneous dispersion of Al3T1 particles. It is fine grained and has grain boundary dispersion of carbides and oxides, predominantly of aluminum. An aluminum-titanium melt is rapidly solidified and then mechanically alloyed in the presence of a carbon-bearing agent. The resulting powder is degassed and hot consolidated to form articles which exhibit high strength, ductility, and creep resistance at temperatures greater than 200 C. Pat-cl-420-552. JES