DEVELOPMENT OF A STABLE-BETA TITANIUM ALLOY.
Abstract
Samples of Ti-17V-10Cr-3Al-1Si, quenched from 2050F and aged at temperatures of 950-1150F, showed Vickers' hardness increases ranging up to 100 points after aging for 1 hour or more at 1150F. Lesser hardness increases were produced by aging at either 950 or 1050F. Ti-17V10Cr-3Al-0:5Si showed a similar, although smaller aging response. Such hardness increases were not accompanied by any clear microstructural change. Substitution of 0.2% Be for Si resulted in no aging response. Hypereutectoid alloys Ti-(8-10)Ni-5Fe, Ti-(8-10)Ni-5Mn, Ti-(11-13)Co5Fe, and Ti-(11-13)Co-5Mn were quenched from 1750 and 1850F and aged at 900F. A marked aging response was only found in those alloys containing Ni. Metallographic examination showed that melting occurred in these alloys during solution treatment. Hot rolling pressure determinations on stable-beta alloys Ti-17V-10Mn-3Al and Ti-8Mo-8V-6Fe-3Al showed that these alloys were no more difficult to hot roll than the commercial beta alloy Ti-13V-11Cr-3Al. Complete substitution of Co for Fe in a stable-beta alloy Ti-8Mo-8V-5Fe-3Al did not improve uniform elongation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1964
- Accession Number
- AD0608281
Entities
People
- D. B. Hunter