Effect of strain rate and test temperature on superplasticity of a Zr-2.5 wt% Nb alloy

    Authors

    S. V. Shukla; C. Chandrashekharayya; R. N. Singh; R. Fotedar; R. Kishore; T. K. Sinha;B. P. Kashyap

    Comments

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    Abbreviated Journal Title

    J. Nucl. Mater.

    Keywords

    GRAIN-GROWTH; BEHAVIOR; DEFORMATION; CAVITATION; FLOW; Materials Science, Multidisciplinary; Nuclear Science & Technology; Mining & Mineral Processing

    Abstract

    Tensile specimens of a Zr-2.5 wt% Nb pressure tube alloy were deformed at strain rates ((epsilon) over dot) of 3.2 x 10(-4)-2.9 x 10(-2) s(-1) and test temperatures (T) of 625-800 degrees C to investigate the nature of stress-strain curves and the optimum condition for superplasticity. The maximum ductility of 1384%;, was obtained at T=700 degrees C and intermediate strain rate of 3.4 x 10(-3) s(-1). The stress-strain curves were found to exhibit the dominance of flow hardening, especially in the early part of deformation, followed by how softening. The variation inductility and flow stress as a function of test condition is explained by the observed microstructural evolution and fracture behavior. (C) 1999 Elsevier Science B.V. All rights reserved.

    Journal Title

    Journal of Nuclear Materials

    Volume

    273

    Issue/Number

    2

    Publication Date

    1-1-1999

    Document Type

    Article

    Language

    English

    First Page

    130

    Last Page

    138

    WOS Identifier

    WOS:000080812600002

    ISSN

    0022-3115

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