How does the initial free volume distribution affect shear band formation in metallic glass?

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	How does the initial free volume distribution affect shear band formation in metallic glass?
	Chen Y(陈艳); Jiang MQ(蒋敏强); Dai LH(戴兰宏)
刊名	Science China-Physics Mechanics & Astronomy
	2011
通讯作者邮箱	lhdai@lnm.imech.ac.cn
卷号	54 期号:8 页码:1488-1494
关键词	Metallic Glass Free Volume Shear Band Yield Strength Inhomogeneous Deformation Mechanical-Properties Amorphous-Alloys Room-Temperature Plasticity Ductility Behavior Flow Bmgs
ISSN号	1674-7348
通讯作者	Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
产权排序	[Chen Yan; Jiang MinQiang; Dai LanHong] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Jiang MinQiang; Dai LanHong] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
中文摘要	Introducing heterogeneities into the structure is an effective way to enhance the plasticity in metallic glasses (MGs). As natural heterogeneity, the original randomly distributed free volume in MGs has been found to be in favor of plasticity. However, the exact correlation between the free volume distribution and mechanical response is still unclear. In this paper, we investigate the shear banding in MGs with different structural disorders, characterized by both the free volume concentration (FVC) and the free volume dispersion (FVD). It is found that, either high FVC or wide FVD leads to low activation stress of shear band; wide FVD promotes the multiplication of shear bands but high FVC restricts it. It reveals that the yield strength in MGs is dependent on the amount of free volume while the plasticity mainly relies on the distribution. An optimum combination of the two aspects probably helps to design a MG of both good plasticity and high strength.
学科主题	Physics
分类号	二类/Q3
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	INHOMOGENEOUS DEFORMATION ; MECHANICAL-PROPERTIES ; AMORPHOUS-ALLOYS ; ROOM-TEMPERATURE ; PLASTICITY ; DUCTILITY ; BEHAVIOR ; FLOW ; BMGS
收录类别	SCI ; EI
资助信息	This work was supported by the National Natural Science Foundation of China (Grants Nos. 10725211, 11002144, 11021262), the National Natural Science Foundation of China-NSAF (Grant No. 10976100), the National Key Basic Research Program of China (Grant No. 2009CB724401) and the Key Project of Chinese Academy of Sciences (Grant No. KJCX2-YW-M04).
原文出处	http://dx.doi.org/10.1007/s11433-011-4376-z
语种	英语
WOS记录号	WOS:000292928900022
公开日期	2012-04-01
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/44917]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Chen Y,Jiang MQ,Dai LH. How does the initial free volume distribution affect shear band formation in metallic glass?[J]. Science China-Physics Mechanics & Astronomy,2011,54(8):1488-1494.
APA	陈艳,蒋敏强,&戴兰宏.(2011).How does the initial free volume distribution affect shear band formation in metallic glass?.Science China-Physics Mechanics & Astronomy,54(8),1488-1494.
MLA	陈艳,et al."How does the initial free volume distribution affect shear band formation in metallic glass?".Science China-Physics Mechanics & Astronomy 54.8(2011):1488-1494.