Effect of Beta Working on 6A1-4V Titanium Alloy
Abstract
This paper describes the results of a structural and metallurgical study of a typical aircraft forging configuration. Specimen testing and testing of a full-size forging were conducted to determine the effects of mill forging procedures (both above and below the beta transus temperature), grain direction, section size, microstructure, and heat treatment condition on several properties. Properties investigated included smooth and notched tensile ultimate and yield strengths, percent elongation, reduction of area, compression yield, shear and bearing strength, fracture toughness and smooth and notched constant amplitude fatigue strength. Smooth and notched tensile and fatigue tests also were conducted on electron beam welded specimens and, finally, a full-sized forging was fatigue tested under simulated service spectrum conditions. The test results indicated that the several variables produced few significant differences in properties. Test specimens from material which had been forged above the beta transus showed slightly higher notched fatigue strength and fracture toughness, and electron beam welded specimens from material forged under both conditions showed higher fatigue strength than basis metal specimens. Other properties were comparable in general.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 17, 1968
- Accession Number
- ADA382375
Entities
People
- J. M. Van Orden
- L. L. Soffa
Organizations
- Lockheed Martin