| 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
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| Source Publication | Acta Materialia
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| 2009 | |
| Pages | 3562-3571 |
| ISSN | 1359-6454 |
| Abstract | 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. |
| Keyword | 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 |
| DOI | 10.1016/j.actamat.2009.04.013 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000267527000013 |
| WOS Keyword | BULK-METALLIC-GLASS ; STRAIN-RATE SENSITIVITY ; MECHANICAL-PROPERTIES ; AMORPHOUS-ALLOYS ; DYNAMIC COMPRESSION ; ASPECT RATIO ; DEFORMATION ; BEHAVIOR ; FRACTURE ; TEMPERATURE |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/26570 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Wu XL |
| Recommended Citation 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. |
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