SST Technology Follow-On Program, Phase I. Beta Processed Titanium Alloy 6Al-4V Plate.
Abstract
This report summarizes the investigations from 1966 to 1971 of beta processed Ti-6Al-4V plate developed for the SST. The mechanical properties evaluated included tensile properties, compression properties, fracture toughness, stress corrosion resistance, crack growth rates and fatigue. Extensive metallurgical analysis was conducted and in many cases a quantitative relationship was determined between metallurgical parameters and several material properties. A wide variation in properties was a direct result of wide variations in chemical composition and mill processing. The most significant variables were oxygen content, microstructure and preferred orientation with K sub ISCC being the most sensitive property affected. A regression analysis equation relating K sub ISCC to chemical composition and microstructure was developed: K sub ISCC (ksi sq root of in.) = 171 - 320 (O2%) + 60 (Fe%) - 16 (Al%) + 1.4 MR, where MR = microstructure rating (0 = bad, 20 = good).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1972
- Accession Number
- AD0902450
Entities
People
- Fred L. Parkinson
Organizations
- Boeing Commercial Airplanes