TITANIUM-BASED ALLOY HAVING IMPROVED CRACK GROWTH BEHAVIOUR

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,...

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Bibliographic Details
Main Authors THOMAS EDWARD O'CONNELL, GEORGE BRODI, DOUGLAS MICHAEL BERCZIK
Format Patent
LanguageEnglish
Published 05.06.1985
Edition4
Subjects
ALLOYS
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary: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 DEG -150 DEG 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 DEG F. and 1100 DEG F. The resultant material has substantially improved crack growth behavior when contrasted with material processed according to the prior art.
Bibliography:Application Number: GB19840025444