Abstract: Casting aluminum-lithium based alloys under a salt cover involves forming a molten aluminum-lithium alloy, transferring the molten aluminum-lithium alloy to a casting station, and direct chill casting the aluminum-lithium alloy, wherein a protective molten salt cover comprising a mixture of lithium chloride and potassium chloride is maintained over the aluminum-lithium alloy during the casting process. Formation of the molten aluminum-lithium alloy includes alloying of lithium with aluminum by adding lithium to the salt-covered molten aluminum in a melting vessel. The molten salt may be added to the ingot head during casting. A preferred salt mixture includes 35 to 90 mole % LiCl and 10 to 65 mole % KCl.

Abstract: A process for making a workpiece suitable for being hot worked to produce a wrought metal poduct is described. Aluminum alloy powder is cold compacted and then heated in an inert environment to provide a sinter-sealed shape. The resultant workpiece may then be subjected to conventional processing to produce the desired wrought product.