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Uncovering two-step shear banding initiation in metallic glasses via complex network theory-based spatial structural parameters

文献类型：期刊论文

作者Zhou YN(周雨诺)1,3; Yang ZY(杨增宇)2; Wang HY(汪海英)1,3; Dai LH(戴兰宏)1,3
刊名INTERNATIONAL JOURNAL OF PLASTICITY
出版日期2025-10-01
卷号193页码:19
关键词Metallic glasses Shear band Complex network theory Molecular dynamics simulation Structural properties
ISSN号0749-6419
DOI10.1016/j.ijplas.2025.104456
通讯作者Dai, Lan-Hong(lhdai@lnm.imech.ac.cn)
英文摘要The structural origin of shear banding in metallic glasses remains elusive due to its inherent multi-scale complexity and nonlinearity. Although significant efforts have been made to characterize medium-range-order structures (MROs) formed by interconnected icosahedra, the spatial features of these structures and the atomic-level origin of shear banding are still ambiguous. In this study, two spatial parameters: "icosahedral packing tightness" and "structural integrity threshold", are proposed based on complex network theory. These two parameters integrate local connections within neighboring icosahedra and their spatial distribution, quantitatively describing the structural evolution under interactions dominated by shear, dilatation, and rotation. A two-step structural softening mechanism for shear banding is revealed: first, the loose boundaries of icosahedral clusters are peeled by small-scale atomic behaviors, leaving densely packed cores that resist softening. Under increasing load, the dilatation expands until the general icosahedral arrangement within the stiff clusters becomes relaxed. The accumulated energy is subsequently released through the further enhancement of rotational softening of the whole rigid structure in a narrow band, leading to shear band formation. Our approach provides a comprehensive framework for characterizing structural features from short range to medium-to-long range in metallic glasses, offering new insights into the detailed origin of shear banding.
分类号一类
WOS关键词MEDIUM-RANGE ORDER ; PLASTIC-DEFORMATION ; DYNAMICS ; MECHANISM ; EVOLUTION ; FLOW ; FLUCTUATION ; ORIGIN
资助项目NSFC[12432019] ; NSFC[12172367] ; NSFC[12402469] ; NSFC Basic Science Center Program for Multi-scale Problems in Nonlinear Mechanics[11988102] ; Ye Qisun Science Foundation of National Natural Science Foundation of China[U2141204] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-2-3] ; National Key Research and Development Program of China[2022YFC3320504-02] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB0620301] ; Postdoctoral Fellowship Program of CPSF[BX20240387]
WOS研究方向Engineering ; Materials Science ; Mechanics
语种英语
WOS记录号WOS:001562553500001
资助机构NSFC ; NSFC Basic Science Center Program for Multi-scale Problems in Nonlinear Mechanics ; Ye Qisun Science Foundation of National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; National Key Research and Development Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Postdoctoral Fellowship Program of CPSF
其他责任者戴兰宏
源URL[http://dspace.imech.ac.cn/handle/311007/103722]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
2.China Acad Engn Phys, Inst Fluid Phys, Mianyang 621999, Sichuan, Peoples R China
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
推荐引用方式
GB/T 7714		 Zhou YN,Yang ZY,Wang HY,et al. Uncovering two-step shear banding initiation in metallic glasses via complex network theory-based spatial structural parameters[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2025,193:19.
APA 周雨诺,杨增宇,汪海英,&戴兰宏.(2025).Uncovering two-step shear banding initiation in metallic glasses via complex network theory-based spatial structural parameters.INTERNATIONAL JOURNAL OF PLASTICITY,193,19.
MLA 周雨诺,et al."Uncovering two-step shear banding initiation in metallic glasses via complex network theory-based spatial structural parameters".INTERNATIONAL JOURNAL OF PLASTICITY 193(2025):19.

入库方式： OAI收割

来源：力学研究所

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