Optimizing the Combination of Strength and Stress-Corrosion Resistance of 7075 Aluminum by Thermal-Mechanical Treatments
Abstract
Yield strengths exceeding 70,000 psi, coupled with stress-corrosion times-to-failure in excess of 30 days (at applied stresses of 75% of yield), were obtained by a two-step overaging/press forging operation. These properties were achieved in the center of blocks that were 3 to 4 inches thick before reductions of 10 to 20%. Longitudinal reductions were found to produce improvements in short transverse yield strength varying from 10,500 to 13,400 psi. Such results typified the strong dependence of mechanical properties on working direction noted in this study. Exploratory heat treatments incorporating several departures from standard practice gave encouraging results in another phase of the program.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1970
- Accession Number
- AD0867291
Entities
People
- A. J. Jacobs