Correlation between relaxations and plastic deformation, and elastic model of flow in metallic glasses and glass-forming liquids

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	Correlation between relaxations and plastic deformation, and elastic model of flow in metallic glasses and glass-forming liquids
	Wang, WH
刊名	JOURNAL OF APPLIED PHYSICS
	2011
卷号	110 期号:5
关键词	BULK AMORPHOUS PD40NI10CU30P20 ROOM-TEMPERATURE TRANSITION TEMPERATURE SECONDARY RELAXATIONS STRUCTURAL RELAXATION SUPERCOOLED LIQUIDS VISCOUS LIQUIDS FREE-VOLUME ALLOYS BEHAVIOR
ISSN号	0021-8979
通讯作者	Wang, WH: Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	We study the similarity and correlations between relaxations and plastic deformation in metallic glasses (MGs) and MG-forming liquids. It is shown that the microscope plastic events, the initiation and formation of shear bands, and the mechanical yield in MGs where the atomic sites are topologically unstable induced by applied stress, can be treated as the glass to supercooled liquid state transition induced by external shear stress. On the other hand, the glass transition, the primary and secondary relaxations, plastic deformation and yield can be attributed to the free volume increase induced flow, and the flow can be modeled as the activated hopping between the inherent states in the potential energy landscape. We then propose an extended elastic model to describe the flow based on the energy landscape theory. That is, the flow activation energy density is linear proportional to the instantaneous elastic moduli, and the activation energy density rho(E) is determined to be a simple expression of rho(E) =10/11G + 1/11K. The model indicates that both shear and bulk moduli are critical parameters accounting for both the homogeneous and inhomogeneous flows in MGs and MG-forming liquids. The elastic model is experimentally certified. We show that the elastic perspectives offers a simple scenario for the flow in MGs and MG-forming liquids and are suggestive for understanding the glass transition, plastic deformation, and nature and characteristics of MGs (C) 2011 American Institute of Physics. [doi: 10.1063/1.3632972]
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/35218]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wang, WH. Correlation between relaxations and plastic deformation, and elastic model of flow in metallic glasses and glass-forming liquids[J]. JOURNAL OF APPLIED PHYSICS,2011,110(5).
APA	Wang, WH.(2011).Correlation between relaxations and plastic deformation, and elastic model of flow in metallic glasses and glass-forming liquids.JOURNAL OF APPLIED PHYSICS,110(5).
MLA	Wang, WH."Correlation between relaxations and plastic deformation, and elastic model of flow in metallic glasses and glass-forming liquids".JOURNAL OF APPLIED PHYSICS 110.5(2011).