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An upper bound on strain rate for wedge type fracture in nickel during creep

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Abstract

It is shown that measurements of the rate of grain boundary sliding using internal friction can be used for calculating an upper bound in strain-rate, above which wedge type of intergranular fracture will not occur. A transition in mode of fracture, from ductile-transgranular at high strain-rate to wedge-intergranular at a lower strain-rate, in Ni is adequately predicted by internal friction measurements. At a still lower strain-rate, a shift from wedge type to “r” type of intergranular fracture occurs. This transition apparently agrees well with the change in the overall creep mechanism from power-law creep to diffusional creep.

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Authors and Affiliations

  1. Division of Engineering, University of Iowa, Iowa City, IA

    C. Gandhi (Assistant Professor)

  2. Department of Materials Science and Engineering, Cornell University, Ithaca, NY

    R. Raj (Associate Professor)

  3. Rockwell International Science Center, 91360, Thousand Oaks, CA

    R. Raj (Associate Professor)

Authors
  1. C. Gandhi
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  2. R. Raj
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Additional information

C. GANDHI, formerly Research Associate, Department of Materials Science and Engineering, Cornell University, Ithaca, NY.

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Gandhi, C., Raj, R. An upper bound on strain rate for wedge type fracture in nickel during creep. Metall Trans A 12, 515–520 (1981). https://doi.org/10.1007/BF02648550

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  • DOI: https://doi.org/10.1007/BF02648550

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