Mechanical and thermal behaviour of U-Mo and U-Nb-Zr Alloys

Denise Adorno Lopes; Thomaz Augusto Guisard Restivo; Angelo Fernando Padilha

doi:10.1016/j.jnucmat.2013.05.014

Mechanical and thermal behaviour of U-Mo and U-Nb-Zr Alloys

Denise Adorno Lopes
, Thomaz Augusto Guisard Restivo
, Angelo Fernando Padilha

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Nuclear fuels composed of uranium alloys in monolithic and dispersed forms are being considered for research and compact power reactors due to their density properties (greater than 15 g-U/cm³) and fast heat transfer. U-Nb-Zr and U-Mo alloys are the most promising systems for plate fuel elements owing to their broad γ-phase stability field, which shows higher ductility and isotropic behaviour, allowing extensive fabrication capability. In the present work, γ-phase stabilized U-7.5Nb-2.5Zr and U-10Mo alloys were characterized by mechanical and thermal analyses for comparison of their behaviour under deformation and heat-treatment. The results demonstrate that the alloys have substantially different properties regarding deformation, kinetics phase transformation and recovery/recrystallization. The main results show that U-Nb-Zr is superior regarding fabrication capabilities although the γ-phase is less stable than U-Mo alloys.

Original language	English
Pages (from-to)	304-309
Number of pages	6
Journal	Journal of Nuclear Materials
Volume	440
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2013.05.014
State	Published - 2013
Externally published	Yes

Funding

The authors thank to CNPq – Brazilian Research Council for the financial support.

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10.1016/j.jnucmat.2013.05.014

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title = "Mechanical and thermal behaviour of U-Mo and U-Nb-Zr Alloys",

abstract = "Nuclear fuels composed of uranium alloys in monolithic and dispersed forms are being considered for research and compact power reactors due to their density properties (greater than 15 g-U/cm3) and fast heat transfer. U-Nb-Zr and U-Mo alloys are the most promising systems for plate fuel elements owing to their broad γ-phase stability field, which shows higher ductility and isotropic behaviour, allowing extensive fabrication capability. In the present work, γ-phase stabilized U-7.5Nb-2.5Zr and U-10Mo alloys were characterized by mechanical and thermal analyses for comparison of their behaviour under deformation and heat-treatment. The results demonstrate that the alloys have substantially different properties regarding deformation, kinetics phase transformation and recovery/recrystallization. The main results show that U-Nb-Zr is superior regarding fabrication capabilities although the γ-phase is less stable than U-Mo alloys.",

author = "Lopes, \{Denise Adorno\} and \{Guisard Restivo\}, \{Thomaz Augusto\} and Padilha, \{Angelo Fernando\}",

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doi = "10.1016/j.jnucmat.2013.05.014",

language = "English",

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T1 - Mechanical and thermal behaviour of U-Mo and U-Nb-Zr Alloys

AU - Lopes, Denise Adorno

AU - Guisard Restivo, Thomaz Augusto

AU - Padilha, Angelo Fernando

PY - 2013

Y1 - 2013

N2 - Nuclear fuels composed of uranium alloys in monolithic and dispersed forms are being considered for research and compact power reactors due to their density properties (greater than 15 g-U/cm3) and fast heat transfer. U-Nb-Zr and U-Mo alloys are the most promising systems for plate fuel elements owing to their broad γ-phase stability field, which shows higher ductility and isotropic behaviour, allowing extensive fabrication capability. In the present work, γ-phase stabilized U-7.5Nb-2.5Zr and U-10Mo alloys were characterized by mechanical and thermal analyses for comparison of their behaviour under deformation and heat-treatment. The results demonstrate that the alloys have substantially different properties regarding deformation, kinetics phase transformation and recovery/recrystallization. The main results show that U-Nb-Zr is superior regarding fabrication capabilities although the γ-phase is less stable than U-Mo alloys.

AB - Nuclear fuels composed of uranium alloys in monolithic and dispersed forms are being considered for research and compact power reactors due to their density properties (greater than 15 g-U/cm3) and fast heat transfer. U-Nb-Zr and U-Mo alloys are the most promising systems for plate fuel elements owing to their broad γ-phase stability field, which shows higher ductility and isotropic behaviour, allowing extensive fabrication capability. In the present work, γ-phase stabilized U-7.5Nb-2.5Zr and U-10Mo alloys were characterized by mechanical and thermal analyses for comparison of their behaviour under deformation and heat-treatment. The results demonstrate that the alloys have substantially different properties regarding deformation, kinetics phase transformation and recovery/recrystallization. The main results show that U-Nb-Zr is superior regarding fabrication capabilities although the γ-phase is less stable than U-Mo alloys.

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JO - Journal of Nuclear Materials

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IS - 1-3

ER -

Mechanical and thermal behaviour of U-Mo and U-Nb-Zr Alloys

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