Phase-field simulation of radiation-induced bubble evolution in recrystallized U–Mo alloy

Yanbo Jiang; Yong Xin; Wenbo Liu; Zhipeng Sun; Ping Chen; Dan Sun; Mingyang Zhou; Xiao Liu; Di Yun

Nuclear Engineering and Technology (Jan 2022)

Phase-field simulation of radiation-induced bubble evolution in recrystallized U–Mo alloy

Yanbo Jiang,
Yong Xin,
Wenbo Liu,
Zhipeng Sun,
Ping Chen,
Dan Sun,
Mingyang Zhou,
Xiao Liu,
Di Yun

Affiliations

Yanbo Jiang: Department of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
Yong Xin: Science and Technology on Reactor System Design Technology Laboratory, P.O. Box 502, Chengdu, 610213, China
Wenbo Liu: Department of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China; Corresponding author.
Zhipeng Sun: Science and Technology on Reactor System Design Technology Laboratory, P.O. Box 502, Chengdu, 610213, China
Ping Chen: Science and Technology on Reactor System Design Technology Laboratory, P.O. Box 502, Chengdu, 610213, China; Corresponding author.
Dan Sun: Science and Technology on Reactor System Design Technology Laboratory, P.O. Box 502, Chengdu, 610213, China
Mingyang Zhou: Science and Technology on Reactor System Design Technology Laboratory, P.O. Box 502, Chengdu, 610213, China
Xiao Liu: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Jiangyou, 621907, China
Di Yun: Department of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China

Journal volume & issue: Vol. 54, no. 1
pp. 226 – 233

Abstract

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In the present work, a phase-field model was developed to investigate the influence of recrystallization on bubble evolution during irradiation. Considering the interaction between bubbles and grain boundary (GB), a set of modified Cahn-Hilliard and Allen-Cahn equations, with field variables and order parameters evolving in space and time, was used in this model. Both the kinetics of recrystallization characterized in experiments and point defects generated during cascade were incorporated in the model. The bubble evolution in recrystallized polycrystalline of U–Mo alloy was also investigated. The simulation results showed that GB with a large area fraction generated by recrystallization accelerates the formation and growth of bubbles. With the formation of new grains, gas atoms are swept and collected by GBs. The simulation results of bubble size and distribution are consistent with the experimental results.

Published in Nuclear Engineering and Technology

ISSN: 1738-5733 (Print)
Publisher: Elsevier
Country of publisher: Korea, Republic of
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-engineering-and-technology

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