Method for developing enhanced texture in titanium alloys, and a

Details Method for developing enhanced texture in titanium alloys, and a Method for developing enhanced texture in titanium alloys, and a

1989-08-16

1991-12-24

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75235, 148 115R, 148 115F, 148 115P, 148 115Q, 1481261, 148127, 148421, 419 19, 419 20, 419 28, 419 29, 419 38, 419 49, C22C 2912

Patent

active

050749072

ABSTRACT:
Enhanced crystallographic texture is developed in an alpha or alpha-beta titanium alloy having a dispersion of particles therein, by heating the alloy to essentially the all beta phase range and mechanically hot working the alloy in this range. The mechanical working is preferably accomplished by extrusion, rolling, or forging. The particles are stable during working, and prevent the formation of random texture in recrystallized beta phase grains at the working temperature. The particles are preferably oxides formed from rare earth elements such as erbium or yttrium, that are introduced into the alloy during manufacture. The alloys processed according to the invention are preferably prepared by powder metallurgy to achieve a uniform microstructure prior to working. A particularly suitable alpha-beta (but near alpha) titanium alloy contains aluminum, zirconium, hafnium, tin, columbium, molybdenum, tungsten, ruthenium, germanium, silicon, and erbium.

REFERENCES:
patent: 4851053 (1989-07-01), Froes et al.

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