Development of local microstructure and crystallographic texture in extruded Zr-2.5Nb tubes

From National Research Council Canada

DOI	Resolve DOI: https://doi.org/10.1016/j.msea.2006.04.048
Author	Search for: Li, Y.; Search for: Rogge, R.; Search for: Holt, R. A.
Format	Text, Article
Subject	Crystallographic texture; Microstructure; Spacial variations; Zr-2.5Nb
Abstract	We report the bulk and local crystallographic texture determined by neutron diffraction in Zr-2.5Nb tubes extruded in the [alpha]?+?[beta] and the [beta]-phase fields. Bulk textures and through-wall variations were determined using neutron diffraction. We correlate these with microstructures determined by transmission electron microscopy. With a preheat temperature of 925?K where the material is ~90% [alpha]-phase, the basal plane are distributed between radial (R) and transverse (T) directions with a small bias towards the T direction. End-to-end, and through-wall variation depends upon the prior microstructure of the billet and the balance between adiabatic heating and chilling. With a preheat temperature of 1090?K, where the material is ~60% [alpha], the basal plane normals are predominantly transverse, more so on the internal diameter, because of the extrusion geometry. With a preheat temperature of 975??C, there is a strong axial component of texture at the front end of the tube, associated with the [beta]- to [alpha]-phase transformation. This component is more pronounced at the core because of chilling of the billet. At the back end of the extrusion the texture is very similar to that produced after preheating at 815??C indicating that the back of the billet was substantially transformed by the time that it entered the die.
Publication date	2006-11-10
In	Materials science and engineering 437, no. 1 (10 November 2006): 10–20.
NRC publication	This is a non-NRC publication "Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.
NPARC number	12327449
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Record identifier	6435f9f1-bd0e-4062-ade5-0de8b7bcb21b
Record created	2009-09-10
Record modified	2020-04-22

Date modified:: 2025-11-13