METHOD FOR THE PRODUCTION OF A HIGHLY STRESSABLE COMPONENT FROM AN a+y-TITANIUM ALUMINIDE ALLOY FOR RECIPROCATING-PISTON ENGINES AND GAS TURBINES, ESPECIALLY AIRCRAFT ENGINES

摘要

A method for the production of a highly stressable component from an α+γ-titanium aluminide alloy for reciprocating-piston engines and gas turbines, especially for aircraft engines, characterized in that the alloy used is a TiAl alloy with the following composition (in atom %):
40-48% Al;2-8% Nb;0.1-9% of at least one β-phase-stabilizing element selected from Mo, V, Ta, Cr, Mn, Ni, Cu, Fe, Si;0-0.5% B; anda remainder of Ti and smelting-related impurities,

wherein the deformation is carried out in a single stage starting from a preform with a volume distribution varying over the longitudinal axis, wherein the component is deformed isothermally in the β-phase region at a logarithmic deformation rate of 0.01-0.5 1/s.

主权项

1. A method for the production of a highly stressable component from an α+γ-titanium aluminide ahoy for reciprocating-piston engines and gas turbines, especially for aircraft engines, wherein the alloy used is a TiAl alloy with the following composition (in atom %):
40-48% Al; 2-8% Nb; 0.01-9% of at least one β-phase stabilizing element selected from Mo, V, Ta, Cr, Mn, Ni, Cu, Fe, Si; 0-0.5% B; and a remainder of Ti and smelting-related impurities,wherein the deformation is carried out in a single stage starting from a preform with a volume distribution varying over the longitudinal axis, wherein the component is deformed isothermally in the β-phase region at a logarithmic is deformation rate of 0.01-0.5 1/s. The method according to claim 1, wherein only Mo, V, Ta, or a mixture thereof is present in the alloy as the β-phase-stabilizing element.