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Rapid Solidification Joining of Intermetallics using Capacitor Discharge Welding

Published online by Cambridge University Press:  22 February 2011

R. D. Wilson
Affiliation:
U.S. Bureau of Mines, Albany Research Center, Albany, OR 97321
D. E. Alman
Affiliation:
U.S. Bureau of Mines, Albany Research Center, Albany, OR 97321
J. A. Hawk
Affiliation:
U.S. Bureau of Mines, Albany Research Center, Albany, OR 97321
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Abstract

Capacitor Discharge Welding (CDW) is a rapid solidification joining process capable of cooling rates greater than 106 K/s. The Bureau of Mines is investigating the CDW process as a method of joining TiAl, Fe3A1 and MoSi2. Experimental results show that the fusion zone of the CDW welds is less than 0.1 mm wide, is uniform in composition, and has a cellular solidification microstructure. This paper compares the CDW microstructure of several intermetallics to the microstructures obtained from the gas tungsten arc welding.

Type
Research Article
Copyright
Copyright © Materials Research Society 1995

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