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Influence of Coarse Second Phase Additions on Mechanical Properties of NiAl

Published online by Cambridge University Press:  01 January 1992

H. Clemens ,
I. Rumberg ,
P. Schretter ,
P. Grahle ,
O. Lang ,
A. Wanner  and
E. Arzt
H. Clemens
Affiliation:
Metallwerk Plansee GmbH, A-6600 Reutte, Austria.
I. Rumberg
Affiliation:
Metallwerk Plansee GmbH, A-6600 Reutte, Austria.
P. Schretter
Affiliation:
Metallwerk Plansee GmbH, A-6600 Reutte, Austria.
P. Grahle
Affiliation:
Max-Planck-Institut für Metallforschung, Institut für Werkstoffwissenschaft, Seestraβe 92, D-7000 Stuttgart 1, Germany.
O. Lang
Affiliation:
Max-Planck-Institut für Metallforschung, Institut für Werkstoffwissenschaft, Seestraβe 92, D-7000 Stuttgart 1, Germany.
A. Wanner
Affiliation:
Max-Planck-Institut für Metallforschung, Institut für Werkstoffwissenschaft, Seestraβe 92, D-7000 Stuttgart 1, Germany.
E. Arzt
Affiliation:
Max-Planck-Institut für Metallforschung, Institut für Werkstoffwissenschaft, Seestraβe 92, D-7000 Stuttgart 1, Germany.
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Abstract

NiAl/Nb and NiAl/Cr composite materials were prepared by a powder metallurgical approach. The content of the second phases varied between 5 and 10 weigth percent. The thermodynamic stability of Nb and Cr particles in the NiAl matrix was studied at 1473K (1200°C) by means of SEM, XRD and microhardness measurements. In the case of Nb the formation of a Laves phase (NbNiAl) was observed whereas the Cr particles remained stable but were hardened to a remarkable extent due to in-diffusion of Ni and Al. This paper presents the results of three-point bending tests performed on as-HIPed and annealed material at room temperature and elevated temperatures. The yielding behavior at room temperature and the creep behavior at 1200K (927°C) were investigated by compression tests.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 1087
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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