Effects of surface energy anisotropy on void evolution during irradiation: A phase-field model

JOURNAL OF NUCLEAR MATERIALS

卷:479

Article

Liu, W. B.^1,2  Wang, N.²  Ji, Y. Z.²  Song, P. C.^2,3  Zhang, C.³  Yang, Z. G.³  Chen, L. Q.^2,3 

[1] Xi An Jiao Tong Univ, Dept Nucl Sci & Technol, Xian 710049, Peoples R China

[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[3] Tsinghua Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Mat, Beijing 100084, Peoples R China

关键词: Surface energy anisotropy;    Void growth;    Ion irradiation;    Phase-field simulation;   

DOI  :  10.1016/j.jnucmat.2016.07.010

来源: Elsevier

【 摘 要 】

A phase-field model is employed to investigate the effects of surface energy anisotropy on void evolution during irradiation. By incorporating a simple orientation dependent surface energy with sharp cusps on given crystallographic orientations, experimentally observed void shape with facets and rounded corners is captured. When applied to polycrystalline materials, grain dependent void morphologies are predicted, and the simulation results are qualitatively similar to reported void morphologies in irradiated copper. In addition, the formation of void denuded zones and vacancy depleted zones adjacent to the grain boundaries (GBs) in bicrystalline and polycrystalline structures are studied. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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