Processing for titanium alloys

Details Processing for titanium alloys Processing for titanium alloys

1983-10-31

1985-09-24

Stallard, Wayland W.

Metal treatment

Compositions

Heat treating

148 127B, 148407, 148421, C22F 118

Patent

active

045431329

ABSTRACT:
Process for improving the crack growth behavior of titanium alloys containing substantial beta stabilizers and at least 3% molybdenum, such as Ti-6-2-4-6. The process includes the steps of forging above the beta transus temperature, cooling at a controlled rate through the beta transus temperature, heating to a temperature between 50.degree.-150.degree. F. below the beta transus temperature, cooling the alloy at a rate in excess of that produced by air cooling, and aging the material between about 900.degree. F. and 1100.degree. F. The resultant material has substantially improved crack growth behavior when contrasted with material processed according to the prior art.

REFERENCES:
patent: 3748194 (1973-07-01), Ruckle et al.
patent: 4053330 (1977-10-01), Henricks et al.
patent: 4309226 (1982-01-01), Chen

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