The Manufacturing of Aircraft-Quality Hydraulic Tubing with the Ti-3Al-8V-6Cr-4Mo-4Zr Alloy.
Abstract
Manufacturing procedures were developed for producing high-quality tubing of the metastable beta titanium alloy Ti-3Al-8V-6Cr-4Mo-4Zr. In excess of 500 feet of tubing was produced and evaluated in each of the three sizes at 0.75-, 0.54- and 0.375-inch diameter. The Ti-3Al-8V-6Cr-4Mo-4Zr alloy was found to be a highly producible tubing material with mechanical properties better than those of other titanium tubing alloys. The producibility of Ti-38-6-44 is enhanced most significantly by proper thermal treatments at initial and intermediate tube sizes, proper reduction sequences and precise tooling arrangements. Ti-38-6-44 was found to offer a wide range of strength levels, as tubing, with excellent ductility. Yield strengths were measured from 120 to more than 200 ksi. Aged to 180 ksi yield strength, Ti-38-6-44 has about 14 percent elongation and a strength-to-weight ratio of 1,035,000 inches which is considerably greater than that of other hydraulic tubing alloys. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1971
- Accession Number
- AD0727779
Entities
People
- Howard B. Bomberger
- John M. Olexa
- Louis J. Bartlo