Cyclic-Crack-Growth and Fracture Resistance of Ti-6Al-6V-2Sn as Influenced by Recrystallization Anneal and Interstitial Oxygen Content.
Abstract
The study was undertaken to determine methods for metallurgical improvement of cyclic-crack-growth and fracture properties in Ti-6Al-6V-2Sn. Two heats of the alloy were studied: an alpha + beta-processed material containing 0.16% interstitial oxygen and a beta-processed material containing 0.08% interstitial oxygen. All test specimens were given a mill anneal heat treatment; in addition some specimens from each heat were given a recrystallization anneal heat treatment. Fatigue-crack growth rates were determined using compact tension specimens, and fracture toughness was determined using 1-in. dynamic tear specimens for each combination of material and heat treatments. The combined effects of recrystallization anneal plus a reduction in interstitial oxygen content significantly improved the cycle-crack-growth properties of Ti-6Al-6V-2Sn.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 08, 1975
- Accession Number
- ADA004970
Entities
People
- C. M. Gilmore
- K. R. Kondas
- Thomas W. Crooker
Organizations
- United States Naval Research Laboratory