DEVELOPMENT OF A STABLE-BETA TITANIUM ALLOY.
Abstract
Additions of Cu, Co, Ni, Si, Be, and misch metal were made to the three base alloys Ti-17V-10Cr 3Al, Ti-8Mo-8V-7.5Fe-3Al, and Ti-15Mo-5Fe-3Al to attempt to bring about precipitation hardening. Of the eighty-six alloys so produced, twenty-six yielded sheet of reasonable quality after hot rolling to 0.080-inch and then cold rolling to 0.050-inch, twenty-five alloys produced poor sheet, and thirty-five alloys were unworkable. The most fabrication difficulty was encountered in alloys containing misch metal and Be, and the higher percentages of Cu, Ni and Co. Reduction of the Cr and Fe contents of the original base alloys resulted in some improvement in sheet quality in alloys to which a high percentage of other hardening agents were also added. No significant heat treatment response was obtained with any of the alloys tested. Two solution treatment temperatures were employed, 1350 and 1500 F, and three aging temperatures, 850, 950 and 1050 F, with aging times up to 24-hours. Metallographic examination indicated that weak precipitation of alpha phase occurred in the majority of the alloys; this precipitation was retarded as the total beta content of the alloys was increased. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1963
- Accession Number
- AD0418762
Entities
People
- D.b. Hunter