VANADIUM ALLOY STUDIES.
Abstract
This program is concerned with the improvement of rupture strength of vanadium alloys in the temperature range of 2000F to 2400F. Alloys based on V-60Cb, V-40Cb30Ta, and V-50Ta were fabricated to 0.025 in. sheet and evaluated for mechanical properties at room temperature and 2200F. Arc-melted ingots exhibited excellent cold rollability once the cast structure had been broken down, and nearly all of the alloys had more than 20% tensile elongation at room temperature. The alloy V-40Cb-30Ta1Ti-0. 235Si-0.075C had an ultimate tensile strength of 210,000 psi in the fully recrystallized condition. Roomtemperature deformation of most of the alloys was accompanied by extensive twinning. Compositions based on V-50Ta were age hardenable. Creep-rupture data obtained under a 10.000 psi load at 2200F in vacuo showed that creep rates of the experimental alloys were much lower than the dilute Cb-1Zr alloy, but were somewhat higher than current commercial columbium alloys. Creep rates for some of the experimental alloys were 0.05 in/in/ hr during a 2 hr exposure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 24, 1965
- Accession Number
- AD0611822
Entities
People
- F. C. Holtz
Organizations
- IIT Research Institute