Structural Characterization of Phase Separation in Fe-Cr: A Current Comparison of Experimental Methods

Xu, Xin; Odqvist, Joakim; Colliander, Magnus Hörnqvist; Thuvander, Mattias; Steuwer, A.; Westraadt, Johan Ewald; King, Stephen M.; Hedström, Peter

doi:10.1007/s11661-016-3800-4

Cited by 29 publications

(23 citation statements)

References 63 publications

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“…These experiments on carefully controlled samples demonstrate that SANS can clearly distinguish between different CuCrZr heat treatments, with an interpretation of the results comparable to TEM and APT. Similar conclusions were drawn for FeCr phase separation data (Xu et al, 2016).…”

Section: Resultssupporting

confidence: 84%

Small-angle neutron scattering from CuCrZr coupons and components

Schoofs¹,

King²,

Cackett³

et al. 2021

J Appl Cryst

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Small-angle neutron scattering (SANS) is performed to analyse the microstructural state of a reference CuCrZr material with carefully controlled heat treatments, small-scale manufacturing mock-ups of assemblies and high-heat-flux-exposed mock-ups for fusion reactor components. The information derived from the SANS data corresponds well to existing literature data based on microscopic-scale techniques, but is obtained at millimetre scale with minimal surface preparation. The manufacturing method and high-heat-flux testing conditions are confirmed to have little impact on the microstructural properties, demonstrating the validity of these treatments for scaled-up reactor components.

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Section: Resultssupporting

confidence: 84%

Small-angle neutron scattering from CuCrZr coupons and components

Schoofs¹,

King²,

Cackett³

et al. 2021

J Appl Cryst

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“…The above description also implies that the peak intensity (IP) is an indicator of the evolution of the nanostructures as has been previously shown [30,39,40]. QP and IP were determined from the SANS patterns as described by Xu et al [40] using the similar method as in [30]. To accomplish this, the scattering due to PS was isolated by subtracting the background signal as shown in Fig.…”

Section: Methodsmentioning

confidence: 98%

Effect of cooling rate after solution treatment on subsequent phase separation during aging of Fe-Cr alloys: A small-angle neutron scattering study

Odqvist

Colliander

et al. 2017

Acta Materialia

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The effect of cooling rate after solution treatment on the initial structure of concentrated binary Fe-Cr alloys and the effect of the initial structure on phase separation during subsequent aging has been investigated. The nano-scale compositional fluctuations in the bulk of the alloys are studied using small-angle neutron scattering and the results are compared with simulations using the Cahn-Hilliard-Cook (CHC) model. The alloys investigated represent different mechanisms of phase separation and at higher Cr content, when spinodal decomposition (SD) is favored, the initial Cr compositional fluctuations due to slow cooling after solution treatment reduce the kinetics of phase decomposition, whereas, at lower Cr composition when nucleation and growth is favored, the kinetics of phase decomposition is more rapid. Regardless of the nominal Cr composition of the alloy, the phase decomposition after extended aging up to 300 h at 748 K is always larger for the more non-random initial structure. The CHC modeling of the cooling process and subsequent initial aging (below 10 h) is in reasonable qualitative agreement with the experimental results for the Fe-40 wt.% Cr alloy decomposing via SD. However, the modeling approach must be refined for accurate quantitative modeling of the full SD process, including coarsening.

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“…SANS was applied to investigate spinodal decomposition in Fe 1−x Cr x (typically x > 0.25) (Bley, 1992;Katano and Iizumi, 1984;Ujihara and Osamura, 2000;Vintaykin and Kolontsov, 1968;Xu et al, 2016). These studies have in common that no external magnetic field was applied to the samples; for a comment see LaSalle and Schwartz (1986).…”

Section: Fe-cr Alloys and Ferritic-martensitic Cr Steelsmentioning

confidence: 99%

Magnetic small-angle neutron scattering

et al. 2019

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Small-angle neutron scattering (SANS) is one of the most important techniques for microstructure determination, being utilized in a wide range of scientific disciplines, such as materials science, physics, chemistry, and biology. The reason for its great significance is that conventional SANS is probably the only method capable of probing structural inhomogeneities in the bulk of materials on a mesoscopic real-space length scale, from roughly 1 − 300 nm. Moreover, the exploitation of the spin degree of freedom of the neutron provides SANS with a unique sensitivity to study magnetism and magnetic materials at the nanoscale. As such, magnetic SANS ideally complements more real-space and surface-sensitive magnetic imaging techniques, e.g., Lorentz transmission electron microscopy, electron holography, magnetic force microscopy, Kerr microscopy, or spinpolarized scanning tunneling microscopy. In this review article we summarize the recent applications of the SANS method to study magnetism and magnetic materials. This includes a wide range of materials classes, from nanomagnetic systems such as soft magnetic Fe-based nanocomposites, hard magnetic Nd−Fe−B-based permanent magnets, magnetic steels, ferrofluids, nanoparticles, and magnetic oxides, to more fundamental open issues in contemporary condensed matter physics such as skyrmion crystals, noncollinar magnetic structures in noncentrosymmetric compounds, magnetic/electronic phase separation, and vortex lattices in type-II superconductors. Special attention is paid not only to the vast variety of magnetic materials and problems where SANS has provided direct insight, but also to the enormous progress made regarding the micromagnetic simulation of magnetic neutron scattering.

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Structural Characterization of Phase Separation in Fe-Cr: A Current Comparison of Experimental Methods

Cited by 29 publications

References 63 publications

Small-angle neutron scattering from CuCrZr coupons and components

Small-angle neutron scattering from CuCrZr coupons and components

Effect of cooling rate after solution treatment on subsequent phase separation during aging of Fe-Cr alloys: A small-angle neutron scattering study

Magnetic small-angle neutron scattering

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