Mechanical properties of near-{gamma} titanium aluminides reinforced with high volume percentages of TiB{sub 2}

Journal Article · Mon Apr 15 00:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(95)00671-0· OSTI ID:230761

VanMeter, M L ^[1]; Kampe, S L ^[2]; Christodoulou, L ^[3]

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1. Naval Air Warfare center, Patuxent River, MD (United States). Aircraft Div.
2. Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
3. Imperial Coll. of Science, Technology, and Medicine, London (United Kingdom)

Near-{gamma} ({alpha}{sub 2}-Ti{sub 3}Al + {gamma}-TiAl) titanium aluminide intermetallic compounds are presently undergoing extensive development as potential lower-density substitutes for conventional high temperature metallic alloys. In this article the authors describe the mechanical behavior of a series of binary near-{gamma} titanium aluminides (i.e., Ti-xAl, where x {approx} 43--48 atomic percent) reinforced with 40--50 volume percent (v%) of a discontinuous dispersion of titanium diboride (TiB{sub 2}) particulate. The composites were synthesized via XD{reg_sign} processing, and subsequently consolidated into bulk form using conventional powder metallurgy (P/M) techniques. For composites comprised of such large volume percentages of ceramic, it is suggested and will be shown that it is most appropriate to evaluate and offer a perspective of their evolved mechanical behavior through their comparison to traditional structural ceramics, e.g., silicon carbide (SiC) and alumina (Al{sub 2}O{sub 3}).

• OSTI ID: 230761
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 8 Vol. 34; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
BULK DENSITY
CERAMICS
CHEMICAL COMPOSITION
COMPOSITE MATERIALS
CORRELATIONS
DUCTILITY
FRACTURE PROPERTIES
HOT PRESSING
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
SYNTHESIS
TITANIUM ALLOYS
TITANIUM BORIDES