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Creep behavior of the heusler type structure alloy Ni2AlTi

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Abstract

A specific method for improving the high temperature creep strength of β-NiAl by a ternary addition giving rise to an additional degree of order is examined. The ternary alloy thus formed has theA 2BC or Heusler type structure, and the present study is devoted to the creep behavior of polycrystalline Ni2AlTi of stoichiometric composition. Possible slip modes are predicted on the basis of the hard sphere model, and quantitative transmission electron microscopy is used to verify these predictions. All intracellular dislocations, and network dislocations have a α0〈110〉 type Burgers vector; α0 is the lattice parameter of a bcc cell of which the large Ni2AlTi unit cell is composed. The creep strength of this alloy is ∼ 3 times that of NiAl in its most creep resistant form, na mely [100] axis single crystals.

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Authors and Affiliations

  1. Department of Metallurgy, University of Connecticut, 06268, Storrs, Connecticut

    P. R. Strutt (Associate Professor) & R. S. Polvani (Research Associate)

  2. Harry Diamond Laboratories, 20438, Washington, D. C.

    J. C. Ingram

Authors
  1. P. R. Strutt
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  2. R. S. Polvani
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  3. J. C. Ingram
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Strutt, P.R., Polvani, R.S. & Ingram, J.C. Creep behavior of the heusler type structure alloy Ni2AlTi. Metall Trans A 7, 23–31 (1976). https://doi.org/10.1007/BF02644035

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  • DOI: https://doi.org/10.1007/BF02644035

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