Stability of precipitates in the anisotropic α-Zr matrix under irradiation

Sarce, A.

doi:10.1016/0022-3115(91)90338-8

Cited by 19 publications

(5 citation statements)

References 30 publications

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“…For higher fluence they became elongated in the direction close to the basal plane trace with prism-plane foil orientation [181] [117] [113] [73] [185] [186]. This shape could be explained by the attempt to minimize the stress field due to matrix/precipitate misfit and by the anisotropy in diffusivity of irradiation-induced point defects [183]. According to Ribis et al [186] the elongated shape of the particle, in the basal plane, was explained by the existence of an invariant line along the [11][12][13][14][15][16][17][18][19][20]// [111] type direction.…”

Section: Enhanced Nb Precipitation Under Neutron Irradiationmentioning

confidence: 99%

Radiation Effects in Zirconium Alloys

Onimus

Béchade

2012

Comprehensive Nuclear Materials

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Section: Enhanced Nb Precipitation Under Neutron Irradiationmentioning

confidence: 99%

Radiation Effects in Zirconium Alloys

Onimus

Béchade

2012

Comprehensive Nuclear Materials

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“…Sarce [18] explained, using the Maydet and Russel approach [19], the peculiar shape of these nanoprecipitates by the assumed anisotropic diffusion of point defects. Nevertheless, Sarce [18] based its theoretical results on the hypothesis that beta-Nb particles are incoherent with the matrix while according to Turkin et al [20], the beta-Nb particles are only partly coherent with the -matrix. Turkin et al [20] attributed the form of needles to the large interface energy.…”

Section: Introductionmentioning

confidence: 99%

Shape, orientation relationships and interface structure of beta-Nb nano-particles in neutron irradiated zirconium alloy

Ribis

Doriot

Onimus

2018

Journal of Nuclear Materials

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Under neutron irradiation, radiation enhanced beta-Nb nano-precipitates develop within the -grains of the Zr-Nb alloys. This radiation enhanced precipitation is of great interest since it may have some influence on the post-irradiation mechanical behavior of the material. In this paper the shape, the orientation relationship and the interface structure of such nano-particles are studied by means of both conventional and high-resolution transmission electron microscopy. The radiation damage was annealed out, thanks to a prior heat treatment and a creep test, in order to easily observe the beta-Nb nano-particles. The nano-particles exhibit a needle-like shape with a short thickness along the cdirection of 1.5 nm on average, a length and a width respectively of 6 nm and 3 nm, on average, in the basal plane. Using high-resolution TEM, a near Pitsch-Schrader orientation relationship is identified for a nano-particle. The interface atomic structure at various locations around the nano-particle has been accurately determined and an atomic model of the interface structure has been proposed.

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“…The small size of these precipitates makes it difficult to clearly characterize them [10], but previous Synchrotron X-Ray Diffraction (XRD) analyses of irradiated M5 ® alloy samples determined similar particles to be Nb particles with about 60% Nb w% content [11]. Different authors suppose that these particles are due to irradiation-enhanced diffusion controlled by migration of non-equilibrium irradiation-induced point defects [24,25,26,27]. These nanometric particles can be seen on FIG.…”

Section: Radiation -Enhanced Needle-like Particlesmentioning

confidence: 99%

Microstructural Evolution of Q12TM Alloy Irradiated in PWRs and Comparison with Other Zr Base Alloys

Doriot

Verhaeghe

Soniak-Defresne

et al. 2018

Zirconium in the Nuclear Industry: 18th International Symposium

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Based on the M5 ® alloy metallurgy, the Q12™ alloy (Zr-1Nb-0.5Sn-0.1Fe) was developed by AREVA NP for structural components, with ultra-low Sn addition and slightly increased Fe content. The behavior of this alloy was tested under irradiation in PWR and has shown, in comparison to M5 ® , improvement in irradiation creep strength and similar free growth. The present paper provides results on dimensional stability and details the microstructural evolution of Q12™ alloy under neutron irradiation in PWR. The microstructural evolution under irradiation of Q12™ was studied for fast neutron fluences up to 13x10 25 n/m 2 (E>1 MeV) with Analytical Transmission Electron Microscopy observations, focused on radiation-enhanced needle-like particles, Laves Phases, and linear density of -component loops. These results are compared with other quaternary Zr-Nb-Sn-Fe alloys and with M5 ®. All these results allow a general discussion about microstructural evolution and behavior under irradiation of quaternary type alloys compared to M5 ® alloy. This study, in agreement with previous works on Zr1Nb and quaternary alloys, seems to show that increasing the iron content with the presence of niobium and tin will decrease the component loop linear density and delay the growth breakaway.

show abstract

Stability of precipitates in the anisotropic α-Zr matrix under irradiation

Cited by 19 publications

References 30 publications

Radiation Effects in Zirconium Alloys

Radiation Effects in Zirconium Alloys

Shape, orientation relationships and interface structure of beta-Nb nano-particles in neutron irradiated zirconium alloy

Microstructural Evolution of Q12TM Alloy Irradiated in PWRs and Comparison with Other Zr Base Alloys

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