| Wavelike fracture pattern in a metallic glass: a Kelvin-Helmholtz flow instability |
| Jiang MQ(蒋敏强) ; Wilde G; Qu CB; Jiang F; Xiao HM; Chen JH; Fu SY; Dai LH(戴兰宏); Jiang, MQ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
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| 发表期刊 | PHILOSOPHICAL MAGAZINE LETTERS
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| 2014-10-03
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| 卷号 | 94期号:10页码:669-677 |
| ISSN | 0950-0839
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| 摘要 | We report a wavelike fracture pattern in a Zr-based bulk metallic glass that has been deformed under quasi-static uniaxial tensions between room temperature (300K) and liquid nitrogen temperature (77K). We attribute this wavelike pattern to a Kelvin-Helmholtz flow instability that occurs at certain interfaces between local cracking/softening regions. The instability criterion for the pattern formation is achieved via a hydrodynamic perturbation analysis, and furthermore, an instability map is built which demonstrates that the shear velocity difference on both sides of the interface is the main destabilizing factor. Finally, the characteristic instability time (the inverse of the instability growth rate) is explored by seeking the dispersion relation in the dominant (fastest) instability mode. The results increase the understanding of the flow and fracture of metallic glasses as well as the nature of their liquid structures. |
| 关键词 | Metallic Glass
Kelvin-helmholtz Instability
Fracture Pattern
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| 学科领域 | Physics
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| URL | 查看原文
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| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000348938400007
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| 项目资助者 | Financial support is from the NSFC [grants number 11372315], [grants number 11132011], [grants number 11023001], [grants number 51171138] and the National Key Research Program of China [grants number 2012CB937500].
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| 课题组名称 | LNM冲击动力学与新型材料力学性能
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| 论文分区 | Q3
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/49562
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| 专题 | 非线性力学国家重点实验室
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| 通讯作者 | Jiang, MQ (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 |
Jiang MQ,Wilde G,Qu CB,et al. Wavelike fracture pattern in a metallic glass: a Kelvin-Helmholtz flow instability[J]. PHILOSOPHICAL MAGAZINE LETTERS,2014,94,10,:669-677.
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| APA |
蒋敏强.,Wilde G.,Qu CB.,Jiang F.,Xiao HM.,...&Jiang, MQ .(2014).Wavelike fracture pattern in a metallic glass: a Kelvin-Helmholtz flow instability.PHILOSOPHICAL MAGAZINE LETTERS,94(10),669-677.
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| MLA |
蒋敏强,et al."Wavelike fracture pattern in a metallic glass: a Kelvin-Helmholtz flow instability".PHILOSOPHICAL MAGAZINE LETTERS 94.10(2014):669-677.
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