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Grain Boundary Softening in Boron-Doped Ni3Al

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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.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Lehigh University, 18015, Bethlehem, PA, U.S.A.

    X. R. Qian & Y. T. Chou

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  1. X. R. Qian
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  2. Y. T. Chou
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Qian, X.R., Chou, Y.T. Grain Boundary Softening in Boron-Doped Ni3Al. MRS Online Proceedings Library 122, 311–316 (1988). https://doi.org/10.1557/PROC-122-311

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