The role of β-Zr in a Zr-2.5Nb alloy during aqueous corrosion: A multi-technique study

Liu, Junliang; He, Guanze; Callow, Anne; Li, Kexue; Moore, Katie L.; Nordin, Heidi; Moody, Michael P.; Lozano-Pérez, Sergio; Grovenor, C.R.M.

doi:10.1016/j.actamat.2021.117042

Cited by 22 publications

(2 citation statements)

References 66 publications

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“…The design life of channel reactors is 30 years [ 6 ]; however, pressure pipes made of zirconium alloys operate less than the design period [ 7 , 8 , 9 ]. Cases of depressurization were observed for CANDU pressure pipes by various sources [ 10 , 11 , 12 ]. Therefore, the task of improving the material of pressure pipes for channel reactors is extremely important.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Radial-Shear Rolling Deformation Processing on the Structure and Properties of Zr-2.5Nb Alloy

et al. 2023

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The rheological properties of the Zr-2.5Nb alloy by the strain rate range of 0.5–15 s−1 and by the temperature range of 20–770 °C was studied. The dilatometric method for phase states temperature ranges was experimentally determined. A material properties database for computer FEM simulation regards the indicated temperature-velocity ranges were created. Using this database and DEFORM-3D FEM-softpack, the radial shear rolling complex process numerical simulation was carried out. The contributed conditions for the ultrafine-grained state alloy structure refinement were determined. Based on the simulation results, a full-scale experiment of Zr-2.5Nb rod rolling a on a radial-shear rolling mill RSP-14/40 was carried out. It takes in seven passes from a diameter of 37–20 mm with a total diameter reduction ε = 85%. According to this case simulation data, the total equivalent strain in the most processed peripheral zone 27.5 mm/mm was reached. Due to the complex vortex metal flow, the equivalent strain over the section distribution was uneven with a gradient reducing towards the axial zone. This fact should have a deep effect on the structure change. Changes and structure gradient by sample section EBSD mapping with 2 mm resolution were studied. The microhardness section gradient by the HV 0.5 method was also studied. The axial and central zones of the sample by the TEM method were studied. The rod section structure has an expressed gradient from the formed equiaxed ultrafine-grained (UFG) structure on a few outer millimeters of the peripheral section to the elongated rolling texture in the center of the bar. The work shows the possibility of processing with the gradient structure obtaining and enhanced properties for the Zr-2.5Nb alloy, and a database for this alloy FEM numerical simulations are also presents.

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Section: Introductionmentioning

confidence: 99%

The Effect of Radial-Shear Rolling Deformation Processing on the Structure and Properties of Zr-2.5Nb Alloy

et al. 2023

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“…Zirconium alloys are widely used in nuclear power reactors in view of their special properties such as good corrosion resistance, adequate mechanical properties, and a low capture cross section for thermal neutrons [1][2][3]. A large number of point defects in zirconium alloys under a fast neutron flux are created, such as vacancies and self-interstitials.…”

Section: Introductionmentioning

confidence: 99%

Trapping Capability of Small Vacancy Clusters in the α-Zr Doped with Alloying Elements: A First-Principles Study

et al. 2022

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Zirconium alloys are subjected to a fast neutron flux in nuclear reactors, inducing the creation of a large number of point defects, both vacancy and self-interstitial. These point defects then diffuse and can be trapped by their different sinks or can cluster to form larger defects, such as vacancy and interstitial clusters. In this work, the trapping capability of small-vacancy clusters (two/three vacancies, V2/V3) in the α-Zr doped with alloying elements (Sn, Fe, Cr, and Nb) has been investigated by first-principle calculations. Calculation results show that for the supercells of α-Zr containing 142-zirconium atoms with the two-vacancy cluster, alloying elements of Sn and Nb in the second vacant site (V2) and Cr in the first vacant site (V1) are more easily trapped by two vacancies, respectively. However, the two sites are both captured more easily by two vacancies for Fe in the supercells of α-Zr containing 142-zirconium atoms inside due to the similar value of the Fermi level. For the supercells of α-Zr containing 141-zirconium atoms with the three-vacancy cluster, the alloying element of Sn in the third vacant site (V’3), Fe in the first vacant site (V’1), and Cr and Nb in the second vacant site (V’2) are more easily trapped by three vacancies, respectively.

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Oxidation Rate and Oxide Microstructures of Zr-1Nb-xFe-0.05Cu-0.05Ge Alloys Corroded in 400 °C Superheated Steam

Han

Zhang

Chen

et al. 2022

J. of Materi Eng and Perform

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The role of β-Zr in a Zr-2.5Nb alloy during aqueous corrosion: A multi-technique study

Cited by 22 publications

References 66 publications

The Effect of Radial-Shear Rolling Deformation Processing on the Structure and Properties of Zr-2.5Nb Alloy

The Effect of Radial-Shear Rolling Deformation Processing on the Structure and Properties of Zr-2.5Nb Alloy

Trapping Capability of Small Vacancy Clusters in the α-Zr Doped with Alloying Elements: A First-Principles Study

Oxidation Rate and Oxide Microstructures of Zr-1Nb-xFe-0.05Cu-0.05Ge Alloys Corroded in 400 °C Superheated Steam

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