| Atomic theory of viscoelastic response and memory effects in metallic glasses | |
Cui, Bingyu; Yang, Jie ; Qiao, Jichao; Jiang MQ(蒋敏强); Dai LH(戴兰宏); Wang YJ(王云江); Zaccone, Alessio; Wang, YJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.; Wang, YJ (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China.
| |
| Source Publication | PHYSICAL REVIEW B
 |
| 2017-09-18 | |
| Volume | 96Issue:9 |
| ISSN | 2469-9950 |
| Abstract | An atomic-scale theory of the viscoelastic response of metallic glasses is derived from first principles, using a Zwanzig-Caldeira-Leggett system-bath Hamiltonian as a starting point within the framework of nonaffine linear response to mechanical deformation. This approach provides a generalized Langevin equation (GLE) as the average equation of motion for an atom or ion in the material, from which non-Markovian nonaffine viscoelastic moduli are extracted. These can be evaluated using the vibrational density of states (DOS) as input, where the boson peak plays a prominent role in the mechanics. To compare with experimental data for binary ZrCu alloys, a numerical DOS was obtained from simulations of this system, which also take electronic degrees of freedom into account via the embedded-atom method for the interatomic potential. It is shown that the viscoelastic a-relaxation, including the a-wing asymmetry in the loss modulus, can be very well described by the theory if the memory kernel (the non-Markovian friction) in the GLE is taken to be a stretched-exponential decaying function of time. This finding directly implies strong memory effects in the atomic-scale dynamics and suggests that the a-relaxation time is related to the characteristic time scale over which atoms retain memory of their previous collision history. This memory time grows dramatically below the glass transition. |
| DOI | 10.1103/PhysRevB.96.094203 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000411075000003 |
| WOS Keyword | MOLECULAR-DYNAMICS ; DEFORMATION ; RELAXATION ; SOLIDS ; TEMPERATURE ; SIMULATIONS ; PEAK |
| WOS Research Area | Physics |
| WOS Subject | Physics, Condensed Matter |
| Funding Organization | NSFC(11402269 ; National Key Research Development Program of China(2017YFB0702003) ; Chinese Academy of Sciences(XDB22040302) ; 11672299 ; 11472287) |
| Department | LNM冲击动力学与新型材料力学性能 |
| Classification | 一类 |
| Ranking | 1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/70064 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Wang, YJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.; Wang, YJ (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China. |
| Recommended Citation GB/T 7714 | Cui, Bingyu,Yang, Jie,Qiao, Jichao,et al. Atomic theory of viscoelastic response and memory effects in metallic glasses[J]. PHYSICAL REVIEW B,2017,96,9,. |
| APA | Cui, Bingyu.,Yang, Jie.,Qiao, Jichao.,蒋敏强.,戴兰宏.,...&Wang, YJ .(2017).Atomic theory of viscoelastic response and memory effects in metallic glasses.PHYSICAL REVIEW B,96(9). |
| MLA | Cui, Bingyu,et al."Atomic theory of viscoelastic response and memory effects in metallic glasses".PHYSICAL REVIEW B 96.9(2017). |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| JouArt-2017-130.pdf（903KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment