An evaluation of fiber-reinforced titanium matrix composites for advanced high-temperature aerospace applications
- Wright Lab., Wright-Patterson AFB, OH (United States). Materials Directorate
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
The current capabilities of continuous silicon-carbide fiber-reinforced titanium matrix composites (TMCs) are reviewed with respect to application needs and compared to the capabilities of conventional high-temperature monolithic alloys and aluminides. In particular, the properties of a first-generation titanium aluminide composite, SCS-6/Ti-24Al-11Nb, and a second-generation metastable beta alloy composite, SCS-6/TIMETAL 21S, are compared with the nickel-base superalloy IN100, the high-temperature titanium alloy Ti-1100, and a relatively new titanium aluminide alloy. Emphasis is given to life-limiting cyclic and monotonic properties and to the influence of time-dependent deformation and environmental effects on these properties. The composite materials offer a wide range of performance capabilities, depending on laminate architecture. In many instances, unidirectional composites exhibit outstanding properties, although the same materials loaded transverse to the fiber direction typically exhibit very poor properties, primarily due to the weak fiber/matrix interface. Depending on the specific mechanical property under consideration, composite cross-ply laminates often show no improvement over the capability of conventional monolithic materials. Thus, it is essential that these composite materials be tailored to achieve a balance of properties suitable to the specific application needs if these materials are to be attractive candidates to replace more conventional materials.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 205255
- Report Number(s):
- CONF-940204--
- Journal Information:
- Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 12 Vol. 26; ISSN MTTABN; ISSN 0360-2133
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Related Subjects
36 MATERIALS SCIENCE
AEROSPACE INDUSTRY
ALUMINIUM ALLOYS
COMPOSITE MATERIALS
CRACK PROPAGATION
DEFORMATION
ENVIRONMENT
INTERFACES
INTERMETALLIC COMPOUNDS
LAYERS
MECHANICAL PROPERTIES
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
SILICON CARBIDES
TEMPERATURE DEPENDENCE
TITANIUM BASE ALLOYS