Nanoscale characterisation of ODS–Eurofer 97 steel: An atom-probe tomography study

Williams, Ceri A.; Marquis, Emmanuelle A.; Cerezo, A.; Smith, George Davey

doi:10.1016/j.jnucmat.2010.02.007

Cited by 138 publications

(94 citation statements)

References 28 publications

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“…ODS steels can be categorized into two main groups based on the chemical constituents of the oxide dispersoids: (i) Al-alloyed ODS steels, such as MA956 [7,8] or PM2000 [9]; and (ii) Ti-alloyed ODS steels without Al, such as MA957 [7,8], ODS EUROFER [10] or 14YWT [3]. Among these ODS steels, in particular high Cr-and Al-alloyed ODS ferritic steels are promising candidate cladding materials for nuclear fission reactors due to their better corrosion resistance against lead-bismuth eutectic coolants [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Oxide nanoparticles in an Al-alloyed oxide dispersion strengthened steel: crystallographic structure and interface with ferrite matrix

Zhang

Pantleon²

2017

Philosophical Magazine

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. Oxide nanoparticles in an Al-alloyed oxide dispersion strengthened steel: crystallographic structure and interface with ferrite matrix. Philosophical Magazine, 97(21), 1824-1846 . DOI: 10.1080/14786435.2017 Oxide nanoparticles in an Al-alloyed oxide dispersion strengthened steel: crystallographic structure and interface with ferrite matrix Oxide nanoparticles are quintessential for ensuring the extraordinary properties of oxide dispersion strengthened (ODS) steels. In this study, the crystallographic structure of oxide nanoparticles, and their interface with the ferritic steel matrix in an Al-alloyed ODS steel, i.e. PM2000, were systematically investigated by high resolution transmission electron microscopy. The majority of oxide nanoparticles were identified to be orthorhombic YAlO3. During hot consolidation and extrusion, they develop a coherent interface and a near cuboidon-cube orientation relationship with the ferrite matrix in the material. After annealing at 1200 C for 1 hour, however, the orientation relationship between the oxide nanoparticles and the matrix becomes arbitrary, and their interface mostly incoherent. Annealing at 1300 C leads to considerable coarsening of oxide nanoparticles, and a new orientation relationship of pseudo-cube-on-cube between oxide nanoparticles and ferrite matrix develops. The reason for the developing interfaces and orientation relationships between oxide nanoparticles and ferrite matrix under different conditions is discussed.

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Section: Introductionmentioning

confidence: 99%

Oxide nanoparticles in an Al-alloyed oxide dispersion strengthened steel: crystallographic structure and interface with ferrite matrix

Zhang

Pantleon²

2017

Philosophical Magazine

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“…Recent atom probe tomography (APT) and TEM studies have shown that the crystallography and chemical composition of the oxide nanoparticles present in ODS-RA steels can be different from the one in the starting oxide powders, giving rise to ternary oxides or core-shell particles. [11][12][13] These changes in the dispersoids could significantly affect their characteristics and, consequently, the mechanical properties and thermal stability of the material. The most sophisticated characterisation techniques must be applied to elucidate the structure of these steels at the near atomic scale, both in as fabricated conditions and after irradiation.…”

Section: Introductionmentioning

confidence: 99%

Analytical characterisation of oxide dispersion strengthened steels for fusion reactors

Castro

Lozano-Pérez

Marquis

et al. 2011

Materials Science and Technology

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Reduced activation ferritic/martensitic and ferritic steels strengthened by a dispersion of oxide nanoparticles have been considered viable structural materials for fusion applications above 550uC. However, the microstructural stability and mechanical behaviour of these steels subjected to the aggressive operating conditions of these reactors are not well known. An accelerated development of these materials is crucial if they are going to be used in future power reactors. Then, it is indispensable to understand their atomic scale evolution under high temperature and irradiation conditions. The present paper reviews how the combination of transmission electron microscopy and atom probe tomography has been successfully applied for the characterisation of these steels at the near atomic scale, to reveal the nanoparticle structure, grain boundary chemistry and void distribution.

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“…This allows obtaining compound materials with an optimum dispersion of particles in small sizes that are not even accessible by powder metallurgy and with particle contents roughly matching the equilibrium fraction required for achieving the desired effects on stiffness and density. This is of interest in view of ODS steels, which owe their favourable property profile from similarly sized and dispersed particles [4,46,47]. Whether the observed microstructures as well as the corresponding soft and homogeneous microhardness profile (Fig.…”

Section: Discussionmentioning

confidence: 94%

Microstructure refinement for high modulus in-situ metal matrix composite steels via controlled solidification of the system Fe–TiB2

et al. 2015

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Nanoscale characterisation of ODS–Eurofer 97 steel: An atom-probe tomography study

Cited by 138 publications

References 28 publications

Oxide nanoparticles in an Al-alloyed oxide dispersion strengthened steel: crystallographic structure and interface with ferrite matrix

Oxide nanoparticles in an Al-alloyed oxide dispersion strengthened steel: crystallographic structure and interface with ferrite matrix

Analytical characterisation of oxide dispersion strengthened steels for fusion reactors

Microstructure refinement for high modulus in-situ metal matrix composite steels via controlled solidification of the system Fe–TiB2

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