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

doi:10.1016/j.actamat.2021.117293

CORC > 力学研究所 > 中国科学院力学研究所 > 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, Guo-Jian 3,4,5; Qiao, Ji-Chao 3; Yao, Yao 2,3; Wang, Yun-Jiang 5; Morthomas, Julien 4; Fusco, Claudio 4; Rodney, David 1
刊名	ACTA MATERIALIA
	2021-11-01
卷号	220 页码:12
关键词	Metallic glasses Composites Nanoglass Dynamic mechanical spectrum Interfaces
ISSN号	1359-6454
DOI	10.1016/j.actamat.2021.117293
通讯作者	Lyu, Guo-Jian(lyuguojian@imech.ac.cn) ; Morthomas, Julien(julien.morthomas@insa-lyon.fr) ; Fusco, Claudio(claudio.fusco@insa-lyon.fr) ; Rodney, David(David.rodney@univ-lyon1.fr)
英文摘要	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.
资助项目	China Scholarship Council (CSC) ; NSFC[12072344] ; NSFC[11790292] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017025]
WOS关键词	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
语种	英语
WOS记录号	WOS:000706865100002
资助机构	China Scholarship Council (CSC) ; NSFC ; Youth Innovation Promotion Association of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87608]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Lyu, Guo-Jian; Morthomas, Julien; Fusco, Claudio; Rodney, David
作者单位	1.Univ Lyon, Univ Lyon 1, Inst Lumiere Matiere, UMR5306,CNRS, F-69622 Villeurbanne, France 2.Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Peoples R China 3.Northwestern Polytech Univ, Sch Mech, Civil Engn Architecture, Xian 710072, Peoples R China 4.Univ Lyon, UMR5510, MATEIS, CNRS,INSA Lyon,UCBL, F-69621 Villeurbanne, France 5.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Lyu, Guo-Jian,Qiao, Ji-Chao,Yao, Yao,et al. Microstructural effects on the dynamical relaxation of glasses and glass composites: A molecular dynamics study[J]. ACTA MATERIALIA,2021,220:12.
APA	Lyu, Guo-Jian.,Qiao, Ji-Chao.,Yao, Yao.,Wang, Yun-Jiang.,Morthomas, Julien.,...&Rodney, David.(2021).Microstructural effects on the dynamical relaxation of glasses and glass composites: A molecular dynamics study.ACTA MATERIALIA,220,12.
MLA	Lyu, Guo-Jian,et al."Microstructural effects on the dynamical relaxation of glasses and glass composites: A molecular dynamics study".ACTA MATERIALIA 220(2021):12.