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Energy dissipation mechanism of G-phase and L-phase metallic glass nanofilms subjected to high-velocity nano-ballistic impact

文献类型：期刊论文

作者Cheng YJ(程玉洁)1,3; Shen, Yidi2; An, Qi4; Jiang MQ(蒋敏强)3,5; Huang CG(黄晨光)3; Goddard, William A2; Wu XQ(吴先前)1,3
刊名EXTREME MECHANICS LETTERS
出版日期2025
卷号74
关键词Metallic glass Molecular dynamics Impact resistance Phase transition Energy dissipation mechanism
ISSN号2352-4316
DOI10.1016/j.eml.2024.102280
英文摘要The energy dissipation mechanisms of G-phase and L-phase metallic glass nanofilms subjected to high-velocity nano-particle impact were investigated by molecular dynamics (MD) simulations. We identified the phase transition from G-phase to L-phase in which the locally ordered core structures transform to liquid-like structures due to local mechanical melting and adiabatic heating of the G-phase under high strain rate impact. The appearance of phase transition provides a new channel for energy dissipation, thus the relatively thicker G-phase nanofilm with ordered core structures has a higher specific energy absorption compared with the L-phase film at the same thickness and impact velocity. However, if the thickness decreases below the characteristic length scale of the heterogeneous structure, the broken core structures in the G-phase films act as prefabricated defects that fail prematurely when subjected to impact, resulting in less impact resistance of the G-phase film compared to the L-phase film. This paper provides a useful method for improving the impact resistance of metallic glass films by tailoring the microstructures.
分类号二类/Q1
WOS研究方向Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics ; Engineering ; Materials Science
语种英语
WOS记录号WOS:001416225800001
资助机构This work was supported by the National Key R & D Program of China (2021YFA0719200) , the National Natural Science Foundation of China (12272391 and 12232020) , the National Outstanding Youth Science Fund Project of National Natural Science Foundation of China (12125206) and the CAS Project for Young Scientists in Basic Research (YSBR-096)
其他责任者吴先前
源URL[http://dspace.imech.ac.cn/handle/311007/101472]  
专题力学研究所_非线性力学国家重点实验室
力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位1.Institute of Mechanics, CAS;
2.California Institute of Technology;
3.University of Chinese Academy of Sciences, CAS;
4.Iowa State University;
5.Institute of Mechanics, CAS
推荐引用方式
GB/T 7714		 Cheng YJ,Shen, Yidi,An, Qi,et al. Energy dissipation mechanism of G-phase and L-phase metallic glass nanofilms subjected to high-velocity nano-ballistic impact[J]. EXTREME MECHANICS LETTERS,2025,74.
APA 程玉洁.,Shen, Yidi.,An, Qi.,蒋敏强.,黄晨光.,...&吴先前.(2025).Energy dissipation mechanism of G-phase and L-phase metallic glass nanofilms subjected to high-velocity nano-ballistic impact.EXTREME MECHANICS LETTERS,74.
MLA 程玉洁,et al."Energy dissipation mechanism of G-phase and L-phase metallic glass nanofilms subjected to high-velocity nano-ballistic impact".EXTREME MECHANICS LETTERS 74(2025).

入库方式： OAI收割

来源：力学研究所

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