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Grain Boundary Softening in Boron-Doped Ni3Al

Published online by Cambridge University Press:  26 February 2011

X. R. Qian  and
Y. T. Chou
X. R. Qian
Affiliation:
Lehigh University, Department of Materials Science and Engineering, Bethlehem, PA 18015, U.S.A.
Y. T. Chou
Affiliation:
Lehigh University, Department of Materials Science and Engineering, Bethlehem, PA 18015, U.S.A.
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Abstract

The effect of 0.2 at.% boron on grain boundary hardness in Ni3Al containing 24 to 26 at.% Al was studied. Normal grain boundary hardening was observed in all alloys with and without boron. However, the addition of boron decreases the magnitude of the grain boundary hardness, and the degree of “softening” depends on alloy stoichiometry. The occurrence of boron-induced softening is likely due to the increase in mobility of grain boundary dislocations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 122: Symposium I – Interfacial Structure, Properties, and Design , 1988 , 311
Copyright
Copyright © Materials Research Society 1988

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References

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