Temperature dependent dynamics transition of intermittent plastic flow in a metallic glass. II. Dynamics analysis

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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.
发表期刊	JOURNAL OF APPLIED PHYSICS
	2013-07-21
卷号	114 期号:3 页码:033521-8
ISSN	0021-8979
摘要	By 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.
关键词	Metallic Glass Transition Temperature Mechanical Behaviour Zr-based Metallic Glass Mechanisms
学科领域	固体力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000322202700036
项目资助者	Research 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]
课题组名称	LNM生物材料微结构和力学性能
论文分区	二类/Q2
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47460
专题	非线性力学国家重点实验室
通讯作者	Wang, G (reprint author), Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China.
推荐引用方式 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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