Onset and Direction of Shear Banding Instability in Metallic Glasses

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	Onset and Direction of Shear Banding Instability in Metallic Glasses
	Chen Y(陈艳); Dai LH(戴兰宏); Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
刊名	Journal of Materials Science & Technology
	2014-06
卷号	30 期号:6 页码:616-621
关键词	Metallic Glasses Shear Banding Instability Bifurcation
ISSN号	1005-0302
产权排序	[Chen, Yan; Dai, Lanhong] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
文献子类	Article
英文摘要	The shear banding instability occurs as the homogenous deformation in metallic glasses (MGs) develops to a critical point, at which the discontinuity in deformation rate is incipient across nano-scale shear bands. When and where the shear instability takes place is an important issue for understanding the shear band origin. However, such condition and direction of shear localization concerning the unique properties of MGs is still lacking for general stress state. In this paper, a new constitutive is introduced for MGs accounting for the pressure sensitivity, dilatancy and structural evolution; the shear banding is regarded as the appearance of instability in the constitutive description of inelastic deformation. Tying the bifurcation theory to the new constitutive, the general condition of deformation localization is derived. The shear band orientation corresponding to the easiest direction of shear instability is then obtained in dependence on pressure sensitivity, dilatancy and Poisson's ratio for MGs. The range of the predicted shear band angles is consistent with the experimental observations.
学科主题	Materials Science ; Metallurgy & Metallurgical Engineering
分类号	二类
URL标识	查看原文
语种	英语
WOS记录号	WOS:000340350300013
资助机构	Financial support is from the National Key Basic Research Program of China (Grant No. 2012CB937500), the National Natural Science Foundation of China (Grants Nos. 11202221 and 11132011), and the CAS/SAFEA International Partnership Program for Creative Research Teams.
公开日期	2014-09-02
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/49012]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Chen Y,Dai LH,Dai, LH . Onset and Direction of Shear Banding Instability in Metallic Glasses[J]. Journal of Materials Science & Technology,2014,30(6):616-621.
APA	Chen Y,Dai LH,&Dai, LH .(2014).Onset and Direction of Shear Banding Instability in Metallic Glasses.Journal of Materials Science & Technology,30(6),616-621.
MLA	Chen Y,et al."Onset and Direction of Shear Banding Instability in Metallic Glasses".Journal of Materials Science & Technology 30.6(2014):616-621.