Phase transformations in a uranium-zirconium alloy containing 2 weight per cent zirconium

Lagerberg, G.

doi:10.1016/0022-3115(63)90144-2

Cited by 31 publications

(6 citation statements)

References 6 publications

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“…The faceted precipitate was found to have an approximately 25Å size in the <100> directions and 21Å size in the <110> directions. This behavior shows the thermodynamic driving force toward the spherical precipitates observed experimentally [5,7,8,[46][47][48][49] and shown in Fig. 1c.…”

Section: Uranium-rich Compositionssupporting

confidence: 58%

“…As the temperature increases even higher, the precipitation remains in the stable bcc band-like structure, but the separated uranium begins to change from bcc to a more liquid state. The band-like atomistic configuration shows the thermodynamic driving force to the lamellar [1][2][3] and acicular [5,7,8,46,47,50,51] microstructures observed experimentally and shown in Fig. 1a and Fig.…”

Section: Uranium-rich Compositionsmentioning

confidence: 69%

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Atomistic mechanisms of morphological evolution and segregation in U-Zr alloys

et al. 2016

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In many metallic alloys, complex microstructures form as a consequence of local atomic ordering that depends on the processing path. This research uses an atomistic approach to study microstructural morphology and evolution in order to investigate how temperature and alloy concentration affect ordering. A semi-empirical Modified Embedded Atom Method (MEAM) is used in conjunction with molecular dynamics (MD) and Monte Carlo (MC) simulations to investigate the properties and equilibrium configurations of the high temperature body-centered-cubic (bcc) uranium-zirconium (U-Zr) alloys. Atomic simulations conducted with the MEAM potential show the thermodynamic driving force to the lamellar structure for the melt-casted U-rich alloys and the finely acicular microstructure of the water quenched U-rich alloys. In addition, when the U-rich U-Zr alloy is equilibrated at a lower temperature, the lamellar/acicular microstructures begin to spheroidize, as observed in experiments. In the intermediate Zr concentration region, the ordering seen is able to facilitate the structure to the partially ordered δ-UZr 2 phase seen experimentally. Lastly, the Zr-rich region is able to successfully show the thermodynamic driving force to the acicular, Widmanstätten, and martensitic needles type microstructures observed experimentally. These simulations are able to successfully replicate some of the fundamental thermo-physical and microstructural characteristics following fabrication and irradiation of the U-Zr metallic fuels.

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Section: Uranium-rich Compositionssupporting

confidence: 58%

Section: Uranium-rich Compositionsmentioning

confidence: 69%

Atomistic mechanisms of morphological evolution and segregation in U-Zr alloys

et al. 2016

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“…Small numbers of open literatures are available which report a comprehensive study on influence of Zr concentration on the various physical properties of U-rich U-Zr alloys. Lagerberg [8] has reported the phase transformation behavior in U-2wt%Zr and recently the same is re-evaluated by Basak et al [9]. Transformation behaviour on quenching of different U-Zr alloys is described by Hills et al [10].…”

Section: Introductionmentioning

confidence: 89%

Physical Metallurgical Studies of Zr-Rich U-Zr Alloys

Ac¹,

Gj²,

Kb³

et al. 2013

J Material Sci Eng

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“…Although these phases do not appear in phase diagrams, their presence can complicate experimental studies of equilibrium phenomena. Whether these phases form in a given sample depends on its cooling rate as well as its composition [77,78,[81][82][83].…”

Section: Solid-state Phase Transitionsmentioning

confidence: 99%

FCRD Advanced Reactor (Transmutation) Fuels Handbook

Janney

Papesch

2016

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Transmutation of minor actinides such as Np, Am, and Cm in spent nuclear fuel is of international interest because of its potential for reducing the long-term health and safety hazards caused by the radioactivity of the spent fuel. One important approach to transmutation (currently being pursued by the DOE Fuel Cycle Research & Development Advanced Fuels Campaign) involves incorporating the minor actinides into U-Pu-Zr alloys, which can be used as fuel in fast reactors. U-Pu-Zr alloys are well suited for electrolytic refining, which leads to incorporation rare-earth fission products such as La, Ce, Pr, and Nd. It is, therefore, important to understand not only the properties of U-Pu-Zr alloys but also those of U-Pu-Zr alloys with concentrations of minor actinides (Np, Am) and rare-earth elements (La, Ce, Pr, and Nd) similar to those in reprocessed fuel.

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Phase transformations in a uranium-zirconium alloy containing 2 weight per cent zirconium

Cited by 31 publications

References 6 publications

Atomistic mechanisms of morphological evolution and segregation in U-Zr alloys

Atomistic mechanisms of morphological evolution and segregation in U-Zr alloys

Physical Metallurgical Studies of Zr-Rich U-Zr Alloys

FCRD Advanced Reactor (Transmutation) Fuels Handbook

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