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Comparative Study of the Microstructure and Tensile Properties of Ni-Al Alloys with Fe and Cr Additions

Published online by Cambridge University Press:  10 February 2011

E. Pekarskaya ,
C. J. Humphreys  and
C. N. Jones
E. Pekarskaya
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge Pembroke Street, Cambridge CB2 3QZ, UK
C. J. Humphreys
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge Pembroke Street, Cambridge CB2 3QZ, UK
C. N. Jones
Affiliation:
ROLLS-ROYCE plc, PO BOX 31, Derby, DE24 8BJ, UK
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Abstract

The tensile behaviour of Ni-32at.% Al-5at.% Fe and Ni-32at.% Al-12 at.% Cr two-phase intermetallic compounds has been studied in the 20–750°C temperature range. TEM studies of the defect structures have been performed. Both alloys exhibit a brittle behaviour at room temperature, while at high temperature the Ni-Al-Cr alloy appears to be much more ductile that the Ni-Al-Fe alloy. Various reasons for the limited ductility and the brittle-to-ductile transition in these alloys are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK5.18.1
Copyright
Copyright © Materials Research Society 1999

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References

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