Orthorhombic Titanium Aluminide Metal Matrix Composites (O TMS's) - A Review
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
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Continuous silicon carbide SiC reinforced titanium matrix composites TMCs utilizing matrices based upon the intermetallic orthorhombic O phase, Ti2AlNb, have been the subject of a significant development activity over the past several years. These O TMCs are considered enabling materials for rotating engine components in order to meet the requisite increased thrustweight ratios and decreased specific fuel consumption targets for the next generation of advanced propulsion systems being developed under the Air Force IHPTET Integrated High Performance Turbine Engine Technology initiative. The O-based class of titanium aluminides has demonstrated significant advantages as a matrix for continuous reinforcement for use at temperatures up to 700 degrees C compared to their alpha-2 a2 Ti3Al and conventional titanium matrix predecessors. Amongst these advantages and increased elevated temperature strength and creep resistance, improved ambient temperature fracture resistance, and decreased reactivity with SiC reinforcing fibers. Additionally, O TMCs, have met or exceeded most generic performance requirements for hoop wound engine hardware such as bladed rings blings or bladed disks blisks. The subject review summarized significant findings for the numerous research activities undertaken in the development and evaluation of this important class of TMCs.
- Laminates and Composite Materials
- Properties of Metals and Alloys