Fundamental links between shear transformation, fi relaxation, and string-like motion in metallic glasses

doi:10.1016/j.actamat.2023.118701

IMECH-IR > 非线性力学国家重点实验室

	Fundamental links between shear transformation, fi relaxation, and string-like motion in metallic glasses
	Zhou, ZhenYa; Sun, Yang; Gao, Liang; Wang YJ(王云江); Yu, HaiBin
通讯作者	Wang, Yun-Jiang([email protected]) ; Yu, Hai-Bin([email protected])
发表期刊	ACTA MATERIALIA
	2023-03-01
卷号	246 页码:11
ISSN	1359-6454
摘要	Plastic deformation and relaxation dynamics are two major topics in glass physics. Secondary (fi) relaxation has been assumed to be a relevant plastic mechanism in amorphous solids, e.g., metallic glasses (MGs), at the macroscopic scale. However, due to the constraints of the time scale of traditional computer simulation, it is still an open question whether the correlation can be justified at the atomic level, or is it just a correlation in a mean-field sense? In this work, molecular dynamics simulations augmented with metadynamics are conducted to study the basic atomic rearrangement mechanism up to experimentally relevant timescales (up to milliseconds). We show that in a unique Al90Sm10 MG with pronounced fi relaxation, the atoms initiating the plastic deformation are exactly the ones apt to develop string-like cooperative motions, as expected from the perspective of fi relaxation. For a Y65Cu35MG without obvious fi relaxation, string-like motions are rarely observed in the deformation of participating atoms, although their atomic displacements are also aligned in a correlative manner. Therefore, our laboratory long-time-scale observation enables the in situ construction of a fundamental link among the versatile concepts of shear transformation, fi relaxation, and string-like motion in amorphous materials.
关键词	Metallic glasses Plastic deformation relaxation String-like motion Accelerated molecular dynamics
DOI	10.1016/j.actamat.2023.118701
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000923686200001
关键词[WOS]	IMPLEMENTING MOLECULAR-DYNAMICS ; MECHANICAL-BEHAVIOR ; ELASTIC PROPERTIES ; AMORPHOUS SOLIDS ; DEFORMATION ; TRANSITION ; PLASTICITY ; DIFFUSION ; STRENGTH ; DEFECTS
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助项目	Na-tional Thousand Young Talents Program of China ; public computing service platform by Network and Computing Center of HUST, China ; National Science Foundation of China[NSFC 52071147] ; National Science Foundation of China[51601064] ; National Science Foundation of China[12072344] ; National Thousand Young Talents Program of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Ningxia Natural Science Foundation, China[2022AAC03066] ; Ningxia Key Research and Development Program, China[2020BEB04026]
项目资助者	Na-tional Thousand Young Talents Program of China ; public computing service platform by Network and Computing Center of HUST, China ; National Science Foundation of China ; National Thousand Young Talents Program of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Ningxia Natural Science Foundation, China ; Ningxia Key Research and Development Program, China
论文分区	一类
力学所作者排名	1
RpAuthor	Wang, Yun-Jiang ; Yu, Hai-Bin
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91623
专题	非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Zhou, ZhenYa,Sun, Yang,Gao, Liang,et al. Fundamental links between shear transformation, fi relaxation, and string-like motion in metallic glasses[J]. ACTA MATERIALIA,2023,246:11.Rp_Au:Wang, Yun-Jiang, Yu, Hai-Bin
APA	Zhou, ZhenYa,Sun, Yang,Gao, Liang,王云江,&Yu, HaiBin.(2023).Fundamental links between shear transformation, fi relaxation, and string-like motion in metallic glasses.ACTA MATERIALIA,246,11.
MLA	Zhou, ZhenYa,et al."Fundamental links between shear transformation, fi relaxation, and string-like motion in metallic glasses".ACTA MATERIALIA 246(2023):11.

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