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Processing Technology for Nickel Aluminides*

Published online by Cambridge University Press:  28 February 2011

Vinod K. Sikka
Vinod K. Sikka*
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37831
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Abstract

Ductile ordered intermetallic alloys of nickel aluminum or nickel aluminum chromium have been developed at the Oak Ridge National Laboratory (ORNL) by optimized additions of boron. These alloys show excellent elevated temperature mechanical properties and corrosion properties. However, in order for the alloys to find use in various applications, they should be fabricable by either the well established or innovative processing technologies. The present paper will discuss the details of fabrication technology being pursued at ORNL. The processes being investigated include powder consolidation by extrusion, powder consolidation by capping, isothermal forging of powder compacted material, twin-roller casting to thin sheet followed by cold-rolling, direct casting rod from liquid, extrusion of billets made by argon-induction melting and electroslag remelting processes, injection molding of powders, and hot isostatic pressing of powders. Relative merits of each process will be discussed. Mechanical properties data on products made by various processes will also be presented and compared.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 81: Symposium H – High-Temperature Ordered Intermetallic Alloys II , 1986 , 487
Copyright
Copyright © Materials Research Society 1987

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Footnotes

*

Research sponsored by the U.S. Department of Energy, Office of Conservation and Renewable Energy, Energy Conversion and Utilization Technologies (ECUT) Program, under contract DE-ACO5-840R21400 with Martin Marietta Energy Systems, Inc.

References

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