High temperature alloy for engine components, based on modified titanium aluminide

摘要

The high-temperature alloy is intended for mechanically and thermally highly stressed components of machines. It is based essentially on doped TiAl and has the following composition:… TixElyMezAl1-(x + y + z), with… El = B, Ge or Si and Me = Co, Cr, Ge, Hf, Mn, Mo, Nb, Pd, Ta, V, W, Y and/or Zr and with the following relationships: … 0.46 /= x             /= 0.54, 0.001 /= y            /= 0.015 for El = Ge and Me = Cr, Hf, Mn, Mo,                      Nb, Ta, V and/or W, 0.001 /= y            /= 0.015 for El = Si and Me = Hf, Mn, Mo, Ta, V                      and/or W, 0 /= y                /= 0.01 for El = B and Me = Co, Ge, Pd, Y and/or                      Zr, 0 /= y                /= 0.02 for El = Ge and Me = Co, Ge, Pd, Y and/or                      Zr, 0.0001 /= y           /= 0.01 for El = B and Me = Cr, Mn, Nb and/or W, 0.01 /= z             /= 0.04, if Me = a single element, 0.01 /= z             /= 0.08, if Me = two or more single elements and 0.46 /= (x + y + z)   /= 0.54. … …IMAGE…