Study of precipitate evolution and recrystallization of β-quenched Zr–Sn–Nb–Fe–Cr–Cu alloy during aging

Chai, Linjiang; Luan, Baifeng; Gao, Shuang; Chen, J.W.; Liu, Q.

doi:10.1016/j.jnucmat.2012.05.009

Cited by 30 publications

(4 citation statements)

References 29 publications

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“…In order to investigate the morphologies of SPPs in the β-quenched sample, a magnified image of the dashed rectangle in Figure 2b is presented. Chai et al [35] indicated that SPPs in fully recrystallized Zr alloys often have a spherical shape. However, in this work, the SPPs have irregular shapes in the β-quenched sample.…”

Section: Corrosion Testsmentioning

confidence: 99%

Homogenization and Growth Behavior of Second-Phase Particles in a Deformed Zr–Sn–Nb–Fe–Cu–Si–O Alloy

Chen

Sang

Zhang

et al. 2018

Metals

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Homogeneous distribution of fine second-phase particles (SPPs) fabricated by cycles of deformation and annealing in zirconium alloys is a critical consideration for the corrosion resistance of fuel claddings. Different deformation degrees of zirconium alloys would result in distinctive microstructures, leading to a distinct growth of SPPs during subsequent annealing. Unfortunately, the homogenization and growth behavior of SPPs in deformed zirconium alloys have not been well studied. In this work, a β-quenched Zr–Sn–Nb–Fe–Cu–Si–O alloy was rolled and annealed at 580 °C or 680 °C. The morphologies, distributions, and sizes of SPPs resulting from the different processing procedures were investigated. A linear distribution of SPPs is found in the β-quenched sample. Afterward, SPPs grow and are randomly distributed during heat treatment as the deformation degree or annealing time (or temperature) increases. The homogenization and growth of SPPs are attributed to the Ostwald ripening mechanism that is governed by lattice diffusion and short-circuit diffusion. The sample with a higher deformation degree is speculated to have a larger number of defects that provide more shortcuts for the mass transfer of SPPs, thereby facilitating a homogeneous distribution of fine SPPs during annealing.

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Section: Corrosion Testsmentioning

confidence: 99%

Homogenization and Growth Behavior of Second-Phase Particles in a Deformed Zr–Sn–Nb–Fe–Cu–Si–O Alloy

Chen

Sang

Zhang

et al. 2018

Metals

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“…As a result, particles grow with the total annealing time increasing accordingly. Studies show that the precipitation behavior of SPPs is influenced seriously by the final cold rolling reduction before final annealing treatment in zirconium alloys [18][19][20][21] . In the present investigation, the final rolling reduction is 82%, 65%, and 53%.…”

Section: Effect Of Cold Rolling Steps On Spps Precipitation Behaviormentioning

confidence: 99%

“…The SPPs like β-Nb, Zr-Nb-Fe usually precipitate at the martensite grain boundaries [19] , they usually distribute homogeneously in the matrix with equiaxed grain structure, and β-Zr generally precipitate at grain boundaries in the alloys with martensite or equiaxed structure [20] . Researches indicate that the decomposition of β-Zr is affected by chemical composition of zirconium alloys [4,15,19] . It shows that β-Zr cannot dissolve in the matrix even after 50 h of annealing at 570 °C in Zr-xNb (x = 0.1%~2.0%) alloys [4] .…”

Section: Effect Of Intermediate Annealing Temperatures On Spps Precipmentioning

confidence: 99%

Effect of Processing Techniques on Precipitation Behavior of Secondary Phase Particles in Zr-1Nb-0.01Cu Alloy

Bai

Wang

Zhang

et al. 2016

Rare Metal Materials and Engineering

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The precipitation behavior of secondary phase particles (SPPs) was investigated in Zr-1Nb-0.01Cu alloy prepared by various processing techniques. The results show that with the decrease of cold rolling and annealing steps, intermediate annealing temperatures, final annealing temperatures and time, the average sizes of SPPs decrease accordingly. The β-Zr phase formed at the intermediate annealing temperature (higher than 640 °C) is hard to dissolve in the matrix after final annealing treatment. During the long-time final annealing process, the SPPs with smaller size coalesce into larger particles by diffusion through the matrix gradually because of Ostwald ripening mechanism. It shows that the decrease of intermediate annealing temperature is more effective than other processing techniques for minimizing the size of SPPs. The average particle size smaller than 50 nm can be achieved by low intermediate/final annealing temperature (≤520 °C) or short annealing time (≤2 h) treatment. The investigations in the present paper are very meaningful to control the SPPs in Zr-Nb based alloys.

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“…neutron economy, mechanical properties and corrosion resistance under irradiation. This can be obtained by a better control of the microstructure during optimizing heat treatments or developing new alloys [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effects of heating rates and alloying elements (Sn, Cu and Cr) on the α → α + β phase transformation of Zr–Sn–Nb–Fe–(Cu, Cr) alloys

Qiu

Luan

Chai

et al. 2014

Journal of Nuclear Materials

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Study of precipitate evolution and recrystallization of β-quenched Zr–Sn–Nb–Fe–Cr–Cu alloy during aging

Cited by 30 publications

References 29 publications

Homogenization and Growth Behavior of Second-Phase Particles in a Deformed Zr–Sn–Nb–Fe–Cu–Si–O Alloy

Homogenization and Growth Behavior of Second-Phase Particles in a Deformed Zr–Sn–Nb–Fe–Cu–Si–O Alloy

Effect of Processing Techniques on Precipitation Behavior of Secondary Phase Particles in Zr-1Nb-0.01Cu Alloy

Effects of heating rates and alloying elements (Sn, Cu and Cr) on the α → α + β phase transformation of Zr–Sn–Nb–Fe–(Cu, Cr) alloys

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