Abstract: A die cast article such is composed of nickel base superaloy IN 718 is disclosed. The microstructure is characterized by an absence of flowlines and includes a fine average grain size, e.g., ASTM 3 or smaller. Exemplary articles include gas turbine engine components, such as blades, vanes, cases and seals.

Abstract: An apparatus and method for die casting includes a multi-part, reusable die having at least two die sections defining a die cavity for receiving molten material to be cast. The die sections are moveable relative to one another. Each die section defines a portion of the die cavity and the die sections define the die cavity when positioned in engagement with one another. A melting unit of the apparatus melts the material, and a shot sleeve receives molten material from the melting unit and is in fluid communication with the die. A plunger unit urges material from the sleeve into the die. The apparatus further includes a reduced pressure means, e.g., a vacuum unit, coupled to at least the die for providing a reduced pressure to at least the die cavity. A sealing mechanism of the apparatus is coupled to the die.