Fractography Observations of Fatigue Failures in Titanium Alloys.
Abstract
Fractographic examinations were made on two titanium alloys Ti 6Al 4V and Ti 6Al 2Sn 6V; the alloys were subjected to different thermomechanical histories and failed in a constant amplitude fatigue test. Results showed no specific correlation between chemistry of alloy and failure mode; however, a clear-cut microstructural dependence of local crack advance was noted. Alpha grain boundaries and alpha-beta interfaces were delineated by the presence of secondary cracks showing their relative weakness. The fracture appearance of these alloys is explained in terms of the localized cyclically work-hardened zone just ahead of the advancing fatigue crack.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1975
- Accession Number
- ADA007427
Entities
People
- Albert Tobin
Organizations
- Grumman