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Elevated temperature deformation of TD-nickel

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Abstract

Sensitivity of the elevated temperature (above 1/2 Tm) deformation of TD-nickel to grain size and shape was examined in both tension and creep. Elevated temperature strength increased with increasing grain diameter and increasingL/D ratio. Temperature sensitivity of the yield stress, as well as high (compared to self diffusion) apparent tensile activation enthalp-ies were the result of the internal stress not being proportional to the shear modulus. Creep activation enthalpies increased with increasingL/D ratio and, to a lesser extent, increasing grain diameter, reaching high values which may be apparent values. The thoria particle dis-persion may have been altered by elevated temperature tensile and creep deformation.

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Authors and Affiliations

  1. Aerospace Research Laboratories, Metallurgy and Ceramics Research Laboratory, Wright-Patterson Air Force Base, 45433, Dayton, Ohio

    J. J. Petrovic (Research Scientist)

  2. Case Western Reserve University, 44106, Cleveland, Ohio

    L. J. Ebert (Professor of Metallurgy and Materials Science)

Authors
  1. J. J. Petrovic
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  2. L. J. Ebert
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Petrovic, J.J., Ebert, L.J. Elevated temperature deformation of TD-nickel. Metall Trans 4, 1301–1308 (1973). https://doi.org/10.1007/BF02644525

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  • DOI: https://doi.org/10.1007/BF02644525

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