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Dispersion Strengthened Intermetallics by Mechanical Alloying: Creep Results and Dislocation Mechanisms

Published online by Cambridge University Press:  01 January 1992

E. Arzt ,
E. Göhring  and
P. Grahle
E. Arzt
Affiliation:
Max-Planck-Institut für Metallforschung and Institut für Metallkunde Stuttgart, Germany
E. Göhring
Affiliation:
Max-Planck-Institut für Metallforschung and Institut für Metallkunde Stuttgart, Germany
P. Grahle
Affiliation:
Max-Planck-Institut für Metallforschung and Institut für Metallkunde Stuttgart, Germany
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Abstract

In order to increase the creep strength, small dispersoids were introduced into the intermetallic compound NiAl by mechanical alloying. Under favorable conditions, the resulting specific creep rates approach those of superalloys. To accompany these experimental effects, a new model has been developed which predicts tendencies for the success of dispersion strengthening in ordered alloys. It is shown that the dissociation distance of the partial dislocations, relative to the dispersoid particle size, has an important effect on the strengthening achievable.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 861
Copyright
Copyright © Materials Research Society 1995

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