Development of a low cost permanent mold casting process for TiAl automotive valves
Conference
·
OSTI ID:225076
- Univ. of Dayton, OH (United States)
- Howmet Corp., Whitehall, MI (United States)
This paper reviews progress made in the development of a low cost permanent mold casting process for TiAl automotive valves. The issues studied include mold life, mold/metal reaction, shrinkage void control, dimensional control, and post casting processes. More than 800 Ti-47Al-2Nb-1.75 Cr (at%) valves were produced by gravity, centrifugal, and pressure assisted casting methods on a laboratory scale. Microstructures, tensile, creep, and fatigue properties of as-HIP and as-heat treated valves are described. Process scale up challenges identified in this work are also discussed.
- OSTI ID:
- 225076
- Report Number(s):
- CONF-950201--; ISBN 0-87339-304-X
- Country of Publication:
- United States
- Language:
- English
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