Defect-induced change of temperature-dependent elastic constants in BCC iron

JOURNAL OF NUCLEAR MATERIALS

卷:490

Article

Gao, N.¹  Setyawan, W.²  Zhang, S. H.³  Wang, Z. G.¹ 

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 73000, Peoples R China

[2] Pacific Northwest Natl Lab, Richland, WA 99352 USA

[3] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

关键词: Elastic constants;    Vacancy;    Void;    Dislocation loop;    Molecular dynamics (MD);   

DOI  :  10.1016/j.jnucmat.2017.04.005

来源: Elsevier

【 摘 要 】

The effects of radiation-induced defects (randomly distributed vacancies, voids, and interstitial dislocation loops) on temperature-dependent elastic constants, C-11, C-12, and C-44 in BCC iron, are studied with molecular dynamics method. The elastic constants are found to decrease with increasing temperatures for all cases containing different defects. The presence of vacancies, voids, or interstitial loops further decreases the elastic constants. For a given number of point defects, the randomly distributed vacancies show the strongest effect compared to voids or interstitial loops. All these results are expected to provide useful information to combine with experimental results for further understanding of radiation damage. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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