Fatigue and fracture of discontinuous TiC reinforced Ti-6Al-4V
- Univ. of Texas, Arlington, TX (United States)
Studies on various metal matrix composites (MMCs) in the past have indicated that MMCs show higher strength and stiffness than their unreinforced counterparts, but there is a significant loss in their ductility and toughness due to the reinforcement. Extensive research is being done in order to increase the toughness and fatigue resistance capabilities of these MMCS. Discontinuous reinforced titanium composites have received particular attention recently, due to their high strength/weight ratio and their potential use at higher temperatures. Titanium carbide reinforcement in titanium matrix appears particularly attractive, as the reinforcement is completely compatible to the matrix and high quality TiC particles are readily available. The mechanical properties of one such MMC (Ti-6Al-4V/10 v/o particulate TiC) and the unreinforced alloy (Ti-6Al-4V) were studied in this analysis. Fatigue crack growth, plane strain fracture toughness and R-curve tests were conducted in both material systems. Metallographic and fractographic studies were completed using optical and scanning electron microscopy.
- OSTI ID:
- 89877
- Report Number(s):
- CONF-9409291--; ISBN 1-56676-220-0
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM ALLOYS
COMPOSITE MATERIALS
CRACK PROPAGATION
EXPERIMENTAL DATA
FATIGUE
FRACTOGRAPHY
FRACTURE MECHANICS
FRACTURE PROPERTIES
METALLOGRAPHY
MICROSTRUCTURE
OPTICAL MICROSCOPY
PARTICULATES
SCANNING ELECTRON MICROSCOPY
STRESS INTENSITY FACTORS
TENSILE PROPERTIES
TITANIUM BASE ALLOYS
TITANIUM CARBIDES
VANADIUM ALLOYS