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DOI | 10.1038/ncomms15960 |
Direct measurement of nanostructural change during in situ deformation of a bulk metallic glass | |
Pekin, Thomas C.1,2; Ding, Jun3; Gammer, Christoph4; Ozdol, Burak2; Ophus, Colin2; Asta, Mark1,3; Ritchie, Robert O.1,3; Minor, Andrew M.1,2 | |
2019-06-04 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2019 |
卷号 | 10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Austria |
英文摘要 | To date, there has not yet been a direct observation of the initiation and propagation of individual defects in metallic glasses during deformation at the nanoscale. Here, we show through a combination of in situ nanobeam electron diffraction and large-scale molecular dynamics simulations that we can directly observe changes to the local short to medium range atomic ordering during the formation of a shear band. We observe experimentally a spatially resolved reduction of order prior to shear banding due to increased strain. We compare this to molecular dynamics simulations, in which a similar reduction in local order is seen, and caused by shear transformation zone activation, providing direct experimental evidence for this proposed nucleation mechanism for shear bands in amorphous solids. Our observation serves as a link between the atomistic molecular dynamics simulation and the bulk mechanical properties, providing insight into how one could increase ductility in glassy materials. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000470082400004 |
WOS关键词 | MEDIUM-RANGE ORDER ; SHEAR BANDS ; PLASTIC-FLOW ; STRUCTURAL HETEROGENEITY ; MECHANICAL-PROPERTIES ; ELECTRON-MICROSCOPY ; ALLOYS ; FRACTURE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/203384 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA; 2.Lawrence Berkeley Natl Lab, Mol Foundry, Natl Ctr Electron Microscopy, 1 Cyclotron Rd, Berkeley, CA 94720 USA; 3.Lawrence Berkeley Natl Lab, Div Mat Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA; 4.Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria |
推荐引用方式 GB/T 7714 | Pekin, Thomas C.,Ding, Jun,Gammer, Christoph,et al. Direct measurement of nanostructural change during in situ deformation of a bulk metallic glass[J]. NATURE COMMUNICATIONS,2019,10. |
APA | Pekin, Thomas C..,Ding, Jun.,Gammer, Christoph.,Ozdol, Burak.,Ophus, Colin.,...&Minor, Andrew M..(2019).Direct measurement of nanostructural change during in situ deformation of a bulk metallic glass.NATURE COMMUNICATIONS,10. |
MLA | Pekin, Thomas C.,et al."Direct measurement of nanostructural change during in situ deformation of a bulk metallic glass".NATURE COMMUNICATIONS 10(2019). |
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