Journal ArticleDOI
Texture evolution in two phase Zr-2.5 wt-%Nb through modified route
TLDR
In this article, the texture evolution during fabrication of two-phase Zr-2.5 wt-%Nb was investigated using a modified route, and it was observed that a strong orientation fibre parallel to the working direction develops with hot working (extrusion). With subsequent cold working, the texture formed after extrusion alone becomes strengthened.Abstract:
Two phase Zr – 2.5 wt-%Nb is used as pressure tube material in water cooled and moderated reactors. The in service behaviour of this hcp zirconium based alloy is dependent on strong textures developed during thermomechanical processing. In the present study, the texture evolution during fabrication of this material, using a modified route, was investigated. Texture, evaluated by the orientation distribution function, was correlated to microstructure during various stages of processing. It was observed that a strong orientation fibre parallel to the working direction develops with hot working (extrusion). With subsequent cold working, the texture formed after extrusion alone becomes strengthened. This observation is attributed to the presence of a soft secondary phase (β) at the α-phase grain boundary. In contrast to the above, in the case of single phase Zircaloy 4, new components of texture are generated with cold deformation after hot extrusion, as a result of interaction between grains.read more
Citations
More filters
Journal ArticleDOI
Influence of temperature on threshold stress for reorientation of hydrides and residual stress variation across thickness of Zr-2.5Nb alloy pressure tube
TL;DR: In this paper, the threshold stress, σth, for reorientation of hydrides in cold worked and stress-relieved (CWSR) Zr 2.5Nb pressure tube material was determined in the temperature range of 523-673 K.
Journal ArticleDOI
Evolution of interphase and intergranular stresses in Zr–2.5Nb during room temperature deformation
TL;DR: In this article, both in situ tension and compression tests have been carried out on textured Zr-2.5Nb plate material at room temperature and the evolution of interphase and intergranular strain was determined by the relative phase properties, crystal properties and texture distribution.
Journal ArticleDOI
Flow behaviour of autoclaved, 20% cold worked, Zr–2.5Nb alloy pressure tube material in the temperature range of room temperature to 800 °C
A.K. Dureja,Sucharita Sinha,Ankit Srivastava,R.K. Sinha,J.K. Chakravartty,P. Seshu,D.N. Pawaskar +6 more
TL;DR: In this paper, the authors used tensile tests carried out in the temperature range from room temperature to 800 °C using the samples taken out from a single pressure tube have been used to develop correlations for characterizing the strength parameters' variation as a function of axial location along length of the tube and the test temperature.
Journal ArticleDOI
A detailed study of texture changes during alpha–beta processing of a zirconium alloy
TL;DR: In this paper, the texture evolution of Zr-2.5 Nb alloys is studied for extruded tube in this alloy and it is shown that the texture in both phases strengthens sharply before the β-transus and when both phases are present in similar amounts.
Journal ArticleDOI
Intergranular and Interphase Constraints in Zirconium Alloys
TL;DR: In this paper, the development of intergranular and interphase constraints in textured Zircaloy-2, Zr-2.5Nb, and Excel alloy during room temperature tension and compression loading in two or three directions relative to the parent texture was reported.
References
More filters
Journal ArticleDOI
Evolution of textures in zirconium alloys deformed uniaxially at elevated temperatures
A. Salinas Rodríguez,J. J. Jonas +1 more
TL;DR: In this paper, texture evolution in α-Zr due to uniaxial deformation at 923 to 1123 K was investigated in crystal-bar Zr and Zr-2.5Nb alloy.
Journal ArticleDOI
The effect of rolling temperature on the texture developed in rolled zirconium rich alloys
B.A. Cheadle,C.E. Ells +1 more
Journal ArticleDOI
Effect of cold working and annealing on the texture of Zr-2·5Nb pressure tubes
TL;DR: In this paper, the evolution of texture during sequential fabrication steps of extrusion, stress relieving, cold working and annealing was studied in terms of texture coefficients and inverse pole figures.