Patent ID: 6912984

Claim:
A composite lightweight engine poppet valve comprising a valve head portion, a stem portion, a tip portion, and a flared fillet portion of said valve head portion defining a region between said valve head portion and said stem portion, said valve head portion and at least a portion of said stem portion being made of a titanium intermetallic material, said stem portion having a first selected length (d 1 , d 2 ), said first selected length (d 1 , d 2 ) of said stem portion being attached with a solid state attachment to one end of a heat treated nickel base alloy transition piece having high creep resistance, said heat treated nickel base alloy transition piece having high creep resistance comprising a heat treated nickel base alloy material having a creep resistance of at least approximately 500 mPa at about 650 degrees C. after about 1000 hours, said transition piece further being attached at another end to a tip portion made from a different material.