Microstructural effects on the dynamical relaxation of glasses and glass composites: A molecular dynamics study

doi:10.1016/j.actamat.2021.117293

IMECH-IR > 非线性力学国家重点实验室

	Microstructural effects on the dynamical relaxation of glasses and glass composites: A molecular dynamics study
	Lyu, GJ 1,2,3; Qiao, JC 3; Yao, Y 3,4; Wang YJ(王云江)1 ; Morthomas, J 2; Fusco, C 2; Rodney, D 5
通讯作者	Lyu, Guo-Jian([email protected]) ; Morthomas, Julien([email protected]) ; Fusco, Claudio([email protected]) ; Rodney, David([email protected])
发表期刊	ACTA MATERIALIA
	2021-11-01
卷号	220 页码:12
ISSN	1359-6454
摘要	One way to increase the ductility of metallic glasses is to induce heterogeneous microstructures, as for example in nanoglasses and crystal-glass composites. The heterogeneities have important consequences not only on the development of shear bands, but also on the structural relaxations in the glass phase. Experiments using dynamic mechanical spectroscopy (DMS) have been conducted, but an atomic-scale picture is still lacking. Here we apply DMS within molecular dynamics simulations to a classical CuZr metallic glass to study how structural relaxations and mechanical energy dissipation are affected by different microstructures, including nanoglasses, crystal-glass nanolaminates and glasses with spherical crystalline inclusions. We find that in a fully glassy system, not only the fraction but also the spatial homogeneity of "hard" icosahedral environments matter. When hard crystalline particles are introduced, the storage modulus simply results from volumetric averages consistent with the classical Voigt and Reuss bounds. On the other hand, loss moduli are much more complex and can be smaller or larger than in a pure glass depending on the microstructure and loading condition. Atomistic processes leading to these evolutions are discussed and remaining open questions are highlighted. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Metallic glasses Composites Nanoglass Dynamic mechanical spectrum Interfaces
DOI	10.1016/j.actamat.2021.117293
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000706865100002
关键词[WOS]	METALLIC-GLASS ; MECHANICAL-PROPERTIES ; MARTENSITIC-TRANSFORMATION ; MATRIX COMPOSITES ; INTERNAL-FRICTION ; B2 CUZR ; BEHAVIOR ; TRANSITION ; TENSILE ; FEATURES
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助项目	China Scholarship Council (CSC) ; NSFC[12072344] ; NSFC[11790292] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017025]
项目资助者	China Scholarship Council (CSC) ; NSFC ; Youth Innovation Promotion Association of Chinese Academy of Sciences
论文分区	一类
力学所作者排名	3+
RpAuthor	Lyu, Guo-Jian ; Morthomas, Julien ; Fusco, Claudio ; Rodney, David
引用统计	被引频次：15[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/311007/87609
专题	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.Univ Lyon, UMR5510, MATEIS, CNRS,INSA Lyon,UCBL, F-69621 Villeurbanne, France; 3.Northwestern Polytech Univ, Sch Mech, Civil Engn Architecture, Xian 710072, Peoples R China; 4.Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Peoples R China; 5.Univ Lyon, Univ Lyon 1, Inst Lumiere Matiere, UMR5306,CNRS, F-69622 Villeurbanne, France
推荐引用方式 GB/T 7714	Lyu, GJ,Qiao, JC,Yao, Y,et al. Microstructural effects on the dynamical relaxation of glasses and glass composites: A molecular dynamics study[J]. ACTA MATERIALIA,2021,220:12.Rp_Au:Lyu, Guo-Jian, Morthomas, Julien, Fusco, Claudio, Rodney, David
APA	Lyu, GJ.,Qiao, JC.,Yao, Y.,王云江.,Morthomas, J.,...&Rodney, D.(2021).Microstructural effects on the dynamical relaxation of glasses and glass composites: A molecular dynamics study.ACTA MATERIALIA,220,12.
MLA	Lyu, GJ,et al."Microstructural effects on the dynamical relaxation of glasses and glass composites: A molecular dynamics study".ACTA MATERIALIA 220(2021):12.

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