Patent ID: 6749518
Filing Date: 2004-06-15
Classification: B23K,F01D,F16C,Y02T,Y10S

Abstract:
A shaft, comprising:an annular mid shaft having first and second ends, said mid shaft comprising a metal matrix composite material; an annular first transition piece having first and second end layers and a barrier layer disposed between said first and second end layers, said first transition piece being disposed coaxially with said mid shaft, wherein said first end layer comprises a first alloy and said second end layer comprises a second alloy and abuts said first end of said mid shaft at a first welded joint, wherein said barrier layer comprises an alloy effective for preventing the formation of intermetallic compounds between said first alloy and said second alloy; an annular first end shaft disposed coaxially with said mid shaft and said first transition piece, said first end shaft having an end abutting said first end layer of said first transition piece at a second welded joint, wherein said first end shaft comprises said first alloy.