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A Phase-Field Study of Spinodal Decomposition Impeded by Irradiation in U-Mo and U-Mo-Zr Alloys

Authors :
Yong Lu
Xue Ni
Honghao Guo
Xiaoyi Huang
Dan Sun
Wenjie Li
Xingjun Liu
Cuiping Wang
Source :
Materials, Vol 16, Iss 24, p 7546 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

The phase-field method, coupled with the micro-elastic model and irradiation-induced cascade mixing model, has been employed to investigate the spinodal decomposition in U-Mo and U-Mo-Zr alloys. The microstructure evolution of U-Mo or U-Mo-Zr alloys under different initial conditions, such as the alloy composition, aging temperature and irradiation intensity, were simulated to study the effect of cascade mixing on the miscibility gap, morphology and volume fraction of the decomposed phases. The simulation results demonstrate that irradiation-induced cascade mixing impedes the process of spinodal decomposition, and that irradiation shrinks the composition range of the miscibility gap in the alloys. Irradiation-induced cascade mixing slows down the anisotropic growth rate of the spinodal decomposition, yet this phenomenon can be weakened with increasing aging temperature. Adding an appropriate amount of Zr to a U-Mo alloy can effectively prevent the contraction of the miscibility gap caused by irradiation.

Details

Language :
English
ISSN :
19961944
Volume :
16
Issue :
24
Database :
Directory of Open Access Journals
Journal :
Materials
Publication Type :
Academic Journal
Accession number :
edsdoj.1b57848208c146bdae8f3b0ddc6b0fd6
Document Type :
article
Full Text :
https://doi.org/10.3390/ma16247546