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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.
Source PublicationPHILOSOPHICAL MAGAZINE LETTERS
2014-10-03
Volume94Issue:10Pages:669-677
ISSN0950-0839
AbstractWe 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.
KeywordMetallic Glass Kelvin-helmholtz Instability Fracture Pattern
Subject AreaPhysics
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000348938400007
Funding OrganizationFinancial 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].
DepartmentLNM冲击动力学与新型材料力学性能
ClassificationQ3
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49563
Collection非线性力学国家重点实验室
Corresponding AuthorJiang, MQ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Recommended Citation
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.
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.
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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