Patent ID: 8864918

Claim:
A method for producing a component of a titanium-aluminum base alloy, comprising: (a) after a through heating for at least about 60 minutes, isostatically pressing, with an increase in pressure to at least about 150 MPa at a temperature of at least about 1000° C., an alloy produced by melting metallurgy or powder metallurgy and having a chemical composition of, in atomic %: Aluminum (Al) from about 41 to about 48 and, optionally, Niobium (Nb) from about 4 to about 9 Molybdenum (Mo) from about 0.1 to about 3.0 Manganese (Mn) up to about 2.4 Boron (B) up to about 1.0 Silicon (Si) up to about 1.0 Carbon (C) up to about 1.0 Oxygen (O) up to about 0.5 Nitrogen (N) up to about 0.5 remainder titanium and impurities, to form a blank, (b) subjecting the blank of (a) to a hot forming by a rapid solid-blank deformation at a rate of greater than about 0.4 mm/sec and a deformation by compression measured as local expansion φ of greater than about 0.3, φ being defined as: φ=In( h f /h o ) h f =height of the workpiece after compression h o =height of the workpiece before compression or to a different forming method with the same minimum deformation, followed by a cooling, wherein a time until a temperature of 700° C. is reached is no more than about 10 min., to form a component that has a deformation microstructure with high recrystallization energy potential, (c) subjecting the component of (b) to a heat treatment in a range of an eutectoid temperature (T eu ) of the alloy for from about 30 min to about 1000 min, followed by cooling in air, to form from a deformation microstructure, a homogeneous, fine globular microstructure composed of phases GAMMA, BETA 0 , ALPHA 2 (γ, β 0 , α 2 ) and having an ordered atomic structure at room temperature: ALPHA 2 : globular with a grain size of from about 1 μm to about 50 μm with a volume proportion of from about 1% to about 50% which may contain isolated, coarser γ lamellae with a thickness of >about 100 nm; BETA 0 : globular surrounding the α 2 phase, with a grain size of from about 1 μm to about 25 μm with a volume proportion of from about 1% to about 50%; GAMMA: globular surrounding the α 2 phase, with a grain size of from about 1 μm to about 25 μm with a volume proportion of from about 1% to about 50%; (d) optionally, subjecting the component of (c) to at least one further heat treatment.