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Advancement of the Directional Solidification process of a NiAl-Alloy

Published online by Cambridge University Press:  21 March 2011

F. Scheppe ,
I. Wagner  and
P.R. Sahm
F. Scheppe
Affiliation:
RWTH Aachen, Giesserei-Institut, Intzestr. 5, D-52056 Aachen, Germany
I. Wagner
Affiliation:
RWTH Aachen, Giesserei-Institut, Intzestr. 5, D-52056 Aachen, Germany
P.R. Sahm
Affiliation:
RWTH Aachen, Giesserei-Institut, Intzestr. 5, D-52056 Aachen, Germany
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Abstract

The directional solidification process of high temperature intermetallic alloys was investigated and discussed for a hypo eutectic NiAl-Cr-alloy. An unexpected solidification behavior was found which may be peculiar to the selected alloy group. The attempts show that due to the required high furnace temperatures only a narrow range of tolerance exists, in which the variation of the process parameters led to directional solidification. Aligned primary NiAl dendrites were then observed, embedded in randomly oriented interdendritic lamellas as known from conventional equiaxed castings. The directional solidification process was basically evaluated for high temperature intermetallics.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 646 , 2000 , N5.7.1
Copyright
Copyright © Materials Research Society 2001

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References

REFERENCES

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