High temperature alloy for machine components based on doped TiAl

Abstract

The high temperature alloy is intended for machine components subjected to high mechanical and thermal stress. It is essentially based on doped TiAl and has the following composition: Ti.sub.x El.sub.y Me.sub.z Al.sub.1 -(x+y+z), in which El=B, Ge or Si and Me=Co, Cr, Ge, Hf, Mn, Mo, Nb, Pd, Ta, V, W, Y, and/or Zr and: ______________________________________ 0.46 .ltoreq.x .ltoreq.0.54, 0.001 .ltoreq.y .ltoreq.0.015 for El = Ge and Me = Cr, Hf, Mn, Mo, Nb, Ta, V and/or W, 0.001 .ltoreq.y .ltoreq.0.015 for El = Si and Me = Hf, Mn, Mo, Ta, V and/or W, 0 .ltoreq.y .ltoreq.0.01 for El = B and Me = Co, Ge, Pd, Y and/or Zr, 0 .ltoreq.y .ltoreq.0.02 for El = Ge and Me = Co, Ge, Pd, Y and/or Zr, 0.0001 .ltoreq.y .ltoreq.0.01 for El = B and Me = Cr, Mn, Nb and/or W, 0.01 .ltoreq.z .ltoreq.0.04 if Me = an individual element, 0.01 .ltoreq.z .ltoreq.0.08 if Me = two or more individual elements and 0.46 .ltoreq.(x + y + z) .ltoreq.0.54. ______________________________________

Dependencies are inferred from the claim text.