Characterization of crystallographic texture of Zirconium alloy components by neutron diffraction

Malamud, Florencia; Riffo, A. Moya; Alvarez, M.G.; Vizcaı́no, P.; Li, M.J.; Liu, X.; Vogel, Sven C.; Law, Michael R.; Sumin, V. V.; Luzin, Vladimir; Vasin, R. N.; Santisteban, J.R.

doi:10.1016/j.jnucmat.2018.08.003

Cited by 14 publications

(10 citation statements)

References 36 publications

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“…Simulation of neutron transmission through a small sample under ideal conditions. The upper panels and the bottom left-hand panel correspond to a Zr sample with the texture of the Zr-2.5Nb pressure tube reported by Malamud et al (2018). In each case the beam propagates along the sample direction displayed in the figure.…”

Section: Example: Signal-to-noise Ratio In a Simplified Model Of A Pr...mentioning

confidence: 99%

“…The intensity collected by the detectors in the simulation of an experiment with the simplified model of a pressure cell described in Section 8, with the cell walls made of Zr with the texture of the Zr-2.5Nb pressure tube reported by Malamud et al (2018) by two area detectors with the geometry of cylindrical sectors of 1 m radius, centred at the sample position, which are 4 m high (vertical direction) and cover angular intervals with respect to the beam direction from 5 to 170 and from 190 to 355 , respectively. By symmetry, the intensity collected by both detectors is essentially the same, and we only show the results for the first detector.…”

Section: Figure 13mentioning

confidence: 99%

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Monte Carlo simulation of neutron scattering by a textured polycrystal

Laliena¹,

Vicente-Alvarez²,

Campo³

2020

J Appl Cryst

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A method of simulating the neutron scattering by a textured polycrystal is presented. It is based on an expansion of the scattering cross sections in terms of the spherical harmonics of the incident and scattering directions, which is derived from the generalized Fourier expansion of the polycrystal orientation distribution function. The method has been implemented in a Monte Carlo code as a component of the McStas software package, and it has been validated by computing some pole figures of a Zircaloy‐4 plate and a Zr–2.5Nb pressure tube, and by simulating an ideal transmission experiment. The code can be used to estimate the background generated by components of neutron instruments such as pressure cells, whose walls are made of alloys with significant crystallographic texture. As a first application, the effect of texture on the signal‐to‐noise ratio was studied in a simple model of a diffraction experiment, in which a sample is placed inside a pressure cell made of a zirconium alloy. With this setting, the results of two simulations were compared: one in which the pressure‐cell wall has a uniform distribution of grain orientations, and another in which the pressure cell has the texture of a Zr–2.5Nb pressure tube. The results showed that the effect of the texture of the pressure cell on the noise of a diffractogram is very important. Thus, the signal‐to‐noise ratio can be controlled by appropriate choice of the texture of the pressure‐cell walls.

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Section: Example: Signal-to-noise Ratio In a Simplified Model Of A Pr...mentioning

confidence: 99%

Section: Figure 13mentioning

confidence: 99%

Monte Carlo simulation of neutron scattering by a textured polycrystal

Laliena¹,

Vicente-Alvarez²,

Campo³

2020

J Appl Cryst

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“…The crystallographic texture of the samples was obtained for the (110), ( 200) and (211) reflections 20 . From the experimental pole figures, the recalculated pole figures (RPF) and the orientation distribution function (ODF) was determined using the MTEX code 21 .…”

Section: Pole Figuresmentioning

confidence: 99%

Controlling the crystalline and magnetic texture in sputtered Fe0.89Ga0.11
Ramirez
¹
,
Malamud
²
,
Gómez
³

et al. 2019
Journal of Magnetism and Magnetic Materials
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4
8
0
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In this work we present a careful study on the relationship between the magnetic and structural properties of a highly magnetostrictive Fe 0.89 Ga 0.11 (Fe-Ga) alloy deposited onto glass, Si and MgO substrates. When grown on glass, the films are polycrystalline with randomly oriented grains without any texture, while the ones on Si and MgO present preferred growth directions. Fe-Ga/Si films show a [113] fibre-like texture, and Fe-Ga/MgO presents a quasi monocrystalline behavior with the (100) film plane direction parallel to the substrate surface. When Fe-Ga/MgO films are annealed an additional (110) texture is also observed. Magnetometry and ferromagnetic resonance (FMR) show that the magnetic behavior is closely related to the structural observed textures. Furthermore, the structural analysis allowed us to get a deeper understanding of the magnetic behavior. This point is very important to get the ability of controlling the crystalline texture by means of growing onto different substrates and/or thermal treatments, which in turns opens the possibility of handling the magnetic texture which is particularly important in magnetostrictive materials for electronic devices.

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“…As an example of a McStas simulation using Texture.comp, we performed a simulation of the background generated by the scattering of a highly collimated neutron beam, with wavelength uniformly distributed between 2.0 Å and 3.0 Å, from a 18 mm diameter and 3 mm thick hollow cylinder made of the Zr2.5%Nb, with the texture reported by Malamud et al [9]. For comparison, we performed also a similar simulation in which the texture is replaced by a uniform distribution of grain orientations (a powder).…”

Section: Coherent Elastic Scatteringmentioning

confidence: 99%

“…3. Simulation of the background generated by a hollow cylinder of Zr2.5%Nb with the texture reported in reference [9] (top panels) and with a uniform distribution of grain orientations (middle panels). In the bottom panels, the ratio between the results of the top and middle panels is shown.…”

Section: Inelastic Scatteringmentioning

confidence: 99%

Routines for optimizing neutron scattering instruments with McStas

Laliena

Alvarez

Campo

2020

JNR

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We present software routines for simulating the transport of thermal neutrons through materials relevant for neutron instrumentation. The elastic interactions in different types of textured polycrystals are modelled and implemented in the routines. Three limit cases of textures are explicitly considered: powder texture, with uniform distribution of grain orientations, mosaic single crystal texture, with a distribution of orientations sharply peaked about one direction, and ideal fibre textures. Sharp textures can be modelled as combinations of these three limit textures. For polycrystals with mild textures, a different method is used. The inelastic scattering is treated in the incoherent approximation, including multi-phonon terms of arbitrary large order. The routines have been implemented in the McStas software package.

show abstract

Characterization of crystallographic texture of Zirconium alloy components by neutron diffraction

Cited by 14 publications

References 36 publications

Monte Carlo simulation of neutron scattering by a textured polycrystal

Monte Carlo simulation of neutron scattering by a textured polycrystal

Controlling the crystalline and magnetic texture in sputtered Fe0.89Ga0.11
Ramirez
¹
,
Malamud
²
,
Gómez
³

et al. 2019
Journal of Magnetism and Magnetic Materials
Self Cite
11
4
8
0
View full text Add to dashboard Cite

Routines for optimizing neutron scattering instruments with McStas

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Characterization of crystallographic texture of Zirconium alloy components by neutron diffraction

Cited by 14 publications

References 36 publications

Monte Carlo simulation of neutron scattering by a textured polycrystal

Monte Carlo simulation of neutron scattering by a textured polycrystal

Controlling the crystalline and magnetic texture in sputtered Fe0.89Ga0.11Ramirez1, Malamud2, Gómez3 et al. 2019Journal of Magnetism and Magnetic MaterialsSelf Cite11480View full textAdd to dashboardCite

Routines for optimizing neutron scattering instruments with McStas

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About

Controlling the crystalline and magnetic texture in sputtered Fe0.89Ga0.11
Ramirez
¹
,
Malamud
²
,
Gómez
³

et al. 2019
Journal of Magnetism and Magnetic Materials
Self Cite
11
4
8
0
View full text Add to dashboard Cite