Atomic theory of viscoelastic response and memory effects in metallic glasses
文献类型：期刊论文
| 作者 | 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.
|
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2017-09-18 |
| 卷号 | 96期号:9 |
| ISSN号 | 2469-9950 |
| DOI | 10.1103/PhysRevB.96.094203 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| 分类号 | 一类 |
| URL标识 | 查看原文 |
| WOS关键词 | MOLECULAR-DYNAMICS ; DEFORMATION ; RELAXATION ; SOLIDS ; TEMPERATURE ; SIMULATIONS ; PEAK |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000411075000003 |
| 资助机构 | NSFC(11402269 ; National Key Research Development Program of China(2017YFB0702003) ; Chinese Academy of Sciences(XDB22040302) ; 11672299 ; 11472287) |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/70064]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | 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. |
| 推荐引用方式 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). |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。