| 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.
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| Source Publication | JOURNAL OF APPLIED PHYSICS
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| 2013-07-21 | |
| Volume | 114Issue:3Pages:033521-8 |
| ISSN | 0021-8979 |
| Abstract | 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. |
| Keyword | Metallic Glass Transition Temperature Mechanical Behaviour Zr-based Metallic Glass Mechanisms |
| Subject Area | 固体力学 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000322202700036 |
| Funding Organization | 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] |
| Department | LNM生物材料微结构和力学性能 |
| Classification | 二类/Q2 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47460 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Wang, 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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