Microstructure/property studies supporting development of low cost processes for TiAl automotive valves

Conference · Sat Jul 01 00:00:00 EDT 1995

OSTI ID:72473

Jones, P E; Porter, III, W J; Keller, M M; Eylon, D ^[1]

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1. Univ. of Dayton, OH (United States)

Lightweight gamma titanium aluminide automotive valves may significantly improve engine performance and fuel economy. However, low cost mass production processes must be developed to realize these gains. Permanent mold casting processes and low cost heat treatments are being developed to enable commercial introduction of TiAl automotive valves. Microstructural development, tensile, creep, and high cycle fatigue properties of permanent mold Ti-47Al-2Nb-1.75Cr (at%) castings are compared with investment castings of similar size. A recommendation is made to use as-HIP castings for components not designed to damage tolerant criteria. This work was performed as pan of a vertically integrated team effort to transfer aerospace TiAl technology to the automotive market.

• OSTI ID: 72473
• Report Number(s): CONF-941144--; ISBN 1-55899-265-0
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
AEROSPACE INDUSTRY
ALUMINIUM ALLOYS
AUTOMOBILES
CASTING
CHROMIUM ALLOYS
FABRICATION
HEAT RESISTING ALLOYS
HOT PRESSING
INTERMETALLIC COMPOUNDS
INTERNAL COMBUSTION ENGINES
MECHANICAL PROPERTIES
MICROSTRUCTURE
NIOBIUM ALLOYS
TECHNOLOGY TRANSFER
TITANIUM ALLOYS
VALVES
WEIGHT