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Effect of strain rate and test temperature on superplasticity of a Zr-2.5 wt% Nb alloy
S.V. Shukla, C. Chandrashekharayya, R.N. Singh, R. Fotedar, R. Kishore, T.K. Sinha,
Published in Elsevier Science Publishers B.V., Amsterdam
Volume: 273
Issue: 2
Pages: 130 - 138
Tensile specimens of a Zr-2.5 wt% Nb pressure tube alloy were deformed at strain rates (ε) of 3.2×10-4-2.9×10-2 s-1 and test temperatures (T) of 625-800 °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°C and intermediate strain rate of 3.4×10-3 s-1. The stress-strain curves were found to exhibit the dominance of flow hardening, especially in the early part of deformation, followed by flow softening. The variation in ductility and flow stress as a function of test condition is explained by the observed microstructural evolution and fracture behavior.
About the journal
JournalData powered by TypesetJournal of Nuclear Materials
PublisherData powered by TypesetElsevier Science Publishers B.V., Amsterdam