Deutsche Forschungsanstalt Fur Luft-und Raumfahrt E.v.

Hoogovens Aluminium Gmbh

Duetsche Forschungsanstalt Fur Luft Und Raumfahrt Dlr

Manfred Peters

Werner Schelb

Karl-Josef Grundhoff

Hartmut Schurmann

Yong-Tai Lee

Karl Welpmann

In order to achieve damage-tolerant properties and sufficient isotropy of aluminum alloys, particularly of type AlLi 8090, subsequent especially to hot-forming of a bar of said aluminum alloy there is interposed a solution heat treatment and quenching, followed by working and subsequent intermediate annealing within a temperature range of from 250.degree. to 475.degree. C. for a period of from 1 to 85 hours. The intermediate annealing is followed by cold forming and subsequent solution heat treatment with the additional purpose of recrystallization, whereupon the recrystallized material is especially cold-formed to a degree of deformation of only up to 8%. Thereafter the sheets having a sheet thickness of from 0.5 to 10 mm are subjected to artificial aging.

Process for the manufacture of aluminum sheets

A process as described for treating Ti.sub.3 Al-based alloys comprising, in ddition to titanium and aluminum as .alpha.-phase-stabilizing element, niobium and further elements stabilizing the .beta.-phase in an amount of from 20 to 30% by weight, wherein the further elements stabilizing the .beta. phase are present in an amount of at least 4% by weight by

Thermomechanical process for treating titanium aluminides based on Ti.sub.3

Growing community of inventors

Munich, Georgia

Manfred Peters