Characterization of hot deformation behavior of Zr–1Nb–1Sn alloy

Chakravartty, J. K. ; Kapoor, R. ; Banerjee, S. ; Prasad, Y. V. R. K. (2007) Characterization of hot deformation behavior of Zr–1Nb–1Sn alloy Journal of Nuclear Materials, 362 (1). pp. 75-86. ISSN 0022-3115

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The hot deformation behavior of β-quenched Zr–1Nb–1Sn was studied in the temperature range 650–1050°C and strain rate range 0.001-100 s−1 using processing maps. These maps revealed three different domains: a domain of dynamic recovery at temperatures <700°C and at strain rates <3×10−3 s−1, a domain of dynamic recrystallization in the temperature range 750-950°C and at strain rates <10−2 s−1 with a peak at 910°C and 10−3 s−1 (in α+β phase field), and a domain of large-grain superplasticity in the β phase field at strain rates <10−2 s−1. In order to identify the rate controlling mechanisms involved in these domains, kinetic analysis was carried out to determine the various activation parameters. In addition, the processing maps showed a regime of flow instability spanning both α+β and β phase fields. The hot deformation behavior of Zr–1Nb–1Sn was compared with that of Zr, Zr-2.5Nb and Zircaloy-2 to bring out the effects of alloy additions.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:37902
Deposited On:30 Apr 2011 08:35
Last Modified:14 May 2011 20:35

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