Fatigue and Fracture of Titanium Aluminides. Volume 2
Abstract
Titanium aluminide composited hold great promise for application in the later stages of advanced compressor systems. This conclusion is based on the assumption that TiA1 composites can achieve the fatigue strength levels projected from data for the SiC/Ti 6A1-4V composite system yet remain stable to 650 C or higher temperatures. In the limited results to date, Ti(3)A1 composite specimens have exhibited a minimum of fiber/matrix interaction, good strength stiffness, and significantly better fatigue strength than monolithic Ti(3)A1. The good fatigue and high stiffness are essential for application to the high temperature compressor spacers in the minimum-weight rotor configuration being developed. The key material design parameters for titanium aluminides and titanium aluminide composites must be identified and understood. These parameters include the fatigue and fracture behavior (crack initiation and propagation as a function of temperature, frequency, size, and stress ratio), the near threshold stress intensity crack growth rates, and the thermomechanical fatigue behavior.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1990
- Accession Number
- ADA227353
Entities
People
- M. L. Gambone
Organizations
- General Motors