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Microstructural evolution in and flow properties of Zr-2.5Nb pressure tube material at elevated temperature

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Field Value
 
Title Microstructural evolution in and flow properties of Zr-2.5Nb pressure tube material at elevated temperature
 
Creator NENE, SS
SHARMA, G
SINGH, RN
KASHYAP, BP
 
Subject NB ALLOY
PHASE FIELD
STRAIN-RATE
BETA-PHASE
BEHAVIOR
SUPERPLASTICITY
 
Description Cold worked and stress relieved Zr-2.5 wt%Nb alloy was annealed at 900 degrees C for 5-90 min and quenched in water, which resulted in formation of alpha' martensite and primary alpha phase. Reheating of the same samples to 700 degrees C leads to alpha' -> alpha(Zr) + beta(Zr) transformation following JMAK kinetics (n = 0.55 and k = 0.34). Tensile samples in annealed condition were deformed at 625-700 degrees C over strain rates of 2 x 10(-5)-1x10(-2) s(-1). With the increase in annealing time, strain rate sensitivity and activation energy for deformation were found to change from 0.42 to 0.20 and 181.4-685 kJ/mol respectively. The maximum peak stress (136.5 MPa) obtained at 700 degrees C from present results suggests higher load bearing ability of the Zr-2.5Nb alloy in annealed and quenched condition compared to that of cold-rolled and stress-relieved condition. (C) 2014 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-12-28T17:10:03Z
2014-12-28T17:10:03Z
2014
 
Type Article
 
Identifier JOURNAL OF NUCLEAR MATERIALS, 449(1/3)62-68
0022-3115
1873-4820
http://dx.doi.org/10.1016/j.jnucmat.2014.03.002
http://dspace.library.iitb.ac.in/jspui/handle/100/16967
 
Language English