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Textural and microstructural developments during fabrication of Zr-2.5Nb pressure tubes

DSpace at IIT Bombay

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Title Textural and microstructural developments during fabrication of Zr-2.5Nb pressure tubes
 
Creator KUMAR, MK
VANITHA, C
SAMAJDAR, I
DEY, GK
TEWARI, R
SRIVASTAVA, D
BANERJEE, S
 
Subject irradiation creep
zirconium alloys
zircaloy-4
anisotropy
growth
nb
evolution
behavior
 
Description Zr-2.5wt%Nb pressure tubes, as used in the Indian pressurized heavy water reactors (PHWR), are fabricated through a combination of hot extrusion followed by two stages of cold pilgering and annealing. The present study makes an effort to systematically characterize the textural changes during the fabrication stages. The starting single-phase hcp martensitic structure was textured to start with and it also went through strong texture developments during hot extrusion. First and especially the second pilgering modified the texture. Such modifications were related to local discontinuity of the softer second phase, as an apparent continuity restricted lattice rotation in the primary hcp phase. Annealing caused discontinuity or spherodization of the bcc phase, but did not create recrystallization in the hcp matrix. The combination of two pilgering plus annealing operations, though the latter did not cause noticeable texture changes, however, reverted the final texture close to the parent hot-extruded texture. (C) 2004
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-27T00:42:30Z
2011-12-26T12:52:50Z
2011-12-27T05:39:46Z
2011-07-27T00:42:30Z
2011-12-26T12:52:50Z
2011-12-27T05:39:46Z
2004
 
Type Article
 
Identifier JOURNAL OF NUCLEAR MATERIALS, 335(1), 48-58
0022-3115
http://dx.doi.org/10.1016/j.jnucmat.2004.07.003
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7062
http://hdl.handle.net/10054/7062
 
Language en