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Superplasticity in an Ni3Al base alloy with 8wt% Cr

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Abstract

A maximum superplastic elongation of 638% has been obtained in a fine-grained Ni3Al-based intermetallic alloy containing 8wt% Cr. The extent of superplasticity obtained is dependent on the heat treatment given to the alloy, the test temperature and the strain rate. The activation energy of deformation and the value for the strain rate sensitivity parameter were comparable to those noted earlier in metallurgical alloy systems. There was some evidence that dynamic recrystallization plays a role in determining the extent of cavitation in the grain sized encountered here.

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Authors and Affiliations

  1. Division of Materials Science and Engineering, Department of Mechanical Engineering, University of California, 95616, Davis, CA, USA

    Ashok Choudhury & Amiya K. Mukherjee

  2. Metals and Ceramics Division, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA

    Vinod K. Sikka

Authors
  1. Ashok Choudhury
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  2. Amiya K. Mukherjee
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  3. Vinod K. Sikka
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Choudhury, A., Mukherjee, A.K. & Sikka, V.K. Superplasticity in an Ni3Al base alloy with 8wt% Cr. J Mater Sci 25, 3142–3148 (1990). https://doi.org/10.1007/BF00587664

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  • DOI: https://doi.org/10.1007/BF00587664

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