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Temperature dependent dynamics transition of intermittent plastic flow in a metallic glass. II. Dynamics analysis
Liu ZY; Wang G; Chan KC; Ren JL; Huang YJ; Bian XL; Xu XH(许向红); Zhang DS; Gao YL; Zhai QJ; Wang, G (reprint author), Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China.
Source PublicationJOURNAL OF APPLIED PHYSICS
2013-07-21
Volume114Issue:3Pages:033521-8
ISSN0021-8979
AbstractBy reducing the testing temperatures down to the temperature well below the glassy transition temperature, the serrated flow behaviour during plastic deformation of a Zr-based metallic glass was experimentally investigated and the results were presented in Part I of the present paper. It shows that the yield strength, the plastic deformation ability, the density of shear bands of the metallic glass increase with decreasing temperature. In order to understand the mechanisms for the changes of the mechanical behaviour at low temperatures, in Part II of this study, the stress-time sequence in the plastic strain regime is characterized by a comprehensive dynamical and statistical analysis. The stress-time sequence is found to exhibit a chaotic state at high temperatures (>203 K), whereas a self-organized critical state is obtained at low temperatures (<= 203 K) due to the freezing effect. The reasons for the transition between these two distinct spatio-temporal dynamical states are elucidated by investigating the effect of temperature on the deformation units (shear transformation zones) and the elastic interactions between neighbouring shear bands. The results demonstrate that the low temperatures results in an enhancement of the interactions between the elastic strain fields initiated by neighbouring shear bands, which is primarily responsible for the enhanced plasticity of the metallic glass and a dynamics transition.
KeywordMetallic Glass Transition Temperature Mechanical Behaviour Zr-based Metallic Glass Mechanisms
Subject Area固体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000322202700036
Funding OrganizationResearch Grants Council of the Hong Kong Special Administrative Region, China [PolyU511211]; NSF of China [51171098, 51222102, 11271339]; NCET program [10-0141]; Shanghai Pujiang Program [11PJ1403900]; Innovation Program of Shanghai Municipal Education Commission [12ZZ090]; Program for Professor of Special Appointment at Shanghai Institutions of Higher Learning; Shanghai University [085]
DepartmentLNM生物材料微结构和力学性能
Classification二类/Q2
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47460
Collection非线性力学国家重点实验室
Corresponding AuthorWang, G (reprint author), Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China.
Recommended Citation
GB/T 7714
Liu ZY,Wang G,Chan KC,et al. Temperature dependent dynamics transition of intermittent plastic flow in a metallic glass. II. Dynamics analysis[J]. JOURNAL OF APPLIED PHYSICS,2013,114(3):033521-8
APA Liu ZY.,Wang G.,Chan KC.,Ren JL.,Huang YJ.,...&Wang, G .(2013).Temperature dependent dynamics transition of intermittent plastic flow in a metallic glass. II. Dynamics analysis.JOURNAL OF APPLIED PHYSICS,114(3),033521-8.
MLA Liu ZY,et al."Temperature dependent dynamics transition of intermittent plastic flow in a metallic glass. II. Dynamics analysis".JOURNAL OF APPLIED PHYSICS 114.3(2013):033521-8.
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