Prevalence Of Shear Banding In Compression Of Zr41Ti14Cu12.5Ni10Be22.5 Pillars As Small As 150 Nm In Diameter

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	Prevalence Of Shear Banding In Compression Of Zr41Ti14Cu12.5Ni10Be22.5 Pillars As Small As 150 Nm In Diameter
	Wu XL(武晓雷); Guo YZ; Wei Q; Wang WH; Wu XL
刊名	Acta Materialia
	2009
通讯作者邮箱	xlwu@imech.ac.cn; qwei@uncc.edu
页码	3562-3571
关键词	Bulk Metallic Glasses In Situ Transmission Electron Microscopy Shear Banding Size Effect Bulk-Metallic-Glass Strain-Rate Sensitivity Mechanical-Properties Amorphous-Alloys Dynamic Compression Aspect Ratio Deformation Behavior Fracture Temperature
ISSN号	1359-6454
通讯作者	Wu XL
中文摘要	Recently, the size dependence of mechanical behaviors, particularly the yield strength and plastic deformation mode, of bulk metallic glasses (BMG) has created a great deal of interest. Contradicting conclusions have been drawn by different research groups, based on various experiments on different BMG systems. Based on in situ compression transmission electron microscopy (TEM) experiments on Zr41Ti14Cu12.5Ni10Be22.5 (Vit 1) nanopillars, this paper provides strong evidence that shear banding still prevails at specimen length scales as small as 150 nm in diameter. This is supported by in situ and ex situ images of shear bands, and by the carefully recorded displacement bursts under load control its well as load drops under displacement control. Finite element modeling of the stress state within the pillar shows that the unavoidable geometry constraints accompanying such experiments impart a strong effect on the experimental results, including non-uniform stress distributions and high level hydrostatic pressures. The seemingly improved compressive ductility is believed to be due to such geometry constraints. Observations underscore the notion that the mechanical behavior of metallic glasses, including strength and plastic deformation mode, is size independent at least in Vit 1. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
类目[WOS]	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]	Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]	BULK-METALLIC-GLASS ; STRAIN-RATE SENSITIVITY ; MECHANICAL-PROPERTIES ; AMORPHOUS-ALLOYS ; DYNAMIC COMPRESSION ; ASPECT RATIO ; DEFORMATION ; BEHAVIOR ; FRACTURE ; TEMPERATURE
收录类别	SCI
语种	英语
WOS记录号	WOS:000267527000013
公开日期	2009-08-03 ; 2009-10-09
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/26570]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Wu XL
推荐引用方式 GB/T 7714	Wu XL,Guo YZ,Wei Q,et al. Prevalence Of Shear Banding In Compression Of Zr41Ti14Cu12.5Ni10Be22.5 Pillars As Small As 150 Nm In Diameter[J]. Acta Materialia,2009:3562-3571.
APA	武晓雷,Guo YZ,Wei Q,Wang WH,&Wu XL.(2009).Prevalence Of Shear Banding In Compression Of Zr41Ti14Cu12.5Ni10Be22.5 Pillars As Small As 150 Nm In Diameter.Acta Materialia,3562-3571.
MLA	武晓雷,et al."Prevalence Of Shear Banding In Compression Of Zr41Ti14Cu12.5Ni10Be22.5 Pillars As Small As 150 Nm In Diameter".Acta Materialia (2009):3562-3571.