Coupling structural, chemical composition and stress fluctuations with relaxation dynamics in metallic glasses
文献类型：期刊论文
| 作者 | Sopu, D.1,2; Yuan, X.1,3; Spieckermann, F.4; Eckert, J.1,4 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2024-08-15 |
| 卷号 | 275页码:7 |
| 关键词 | Metallic glasses Molecular dynamics simulations Dynamics relaxation |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2024.120033 |
| 通讯作者 | Sopu, D.(daniel.sopu@oaew.ac.at) |
| 英文摘要 | Understanding the atomistic mechanisms of relaxation dynamics in metallic glasses remains a longstanding challenge. Here, using microsecond time scale molecular dynamics simulations, three main relaxation stages in metallic glasses are identified. At about 0.6T(g), chemical composition plays a dominant role in the relaxation, manifested by stress accumulation and only minimal variations in structure. As T-g approaches, the confluence of structural heterogeneity and chemical composition leads to the decoupling of relaxation mechanisms. At this temperature, the relaxation results in a structure with a lower energy state and a lower level of stress. In the supercooled liquid regime, an extensive increase in the number of closed-packed icosahedral clusters is responsible for accelerated structural relaxation while their packing frustration leads to the accumulation of intrinsic residual stresses in the glass. The atomistic origin of these dynamic relaxation modes is discussed in terms of structural, chemical composition and stress variations. |
| 资助项目 | Deutsche Forschungs Gemeinschaft (DFG) , Germany[SO 1518/1-1] ; European Research Council under the ERC[ERC-2013-ADG-340025] ; China Scholarship Council (CSC)[201806220096] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001248349800001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Deutsche Forschungs Gemeinschaft (DFG) , Germany ; European Research Council under the ERC ; China Scholarship Council (CSC) |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Sopu, D. |
| 作者单位 | 1.Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria 2.Tech Univ Darmstadt, Inst Mat Sci, Mat Modelling, Otto Berndt Str 3, D-64287 Darmstadt, Germany 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.Univ Leoben, Dept Mat Sci, Jahnstr 12, A-8700 Leoben, Austria |
| 推荐引用方式 GB/T 7714 | Sopu, D.,Yuan, X.,Spieckermann, F.,et al. Coupling structural, chemical composition and stress fluctuations with relaxation dynamics in metallic glasses[J]. ACTA MATERIALIA,2024,275:7. |
| APA | Sopu, D.,Yuan, X.,Spieckermann, F.,&Eckert, J..(2024).Coupling structural, chemical composition and stress fluctuations with relaxation dynamics in metallic glasses.ACTA MATERIALIA,275,7. |
| MLA | Sopu, D.,et al."Coupling structural, chemical composition and stress fluctuations with relaxation dynamics in metallic glasses".ACTA MATERIALIA 275(2024):7. |
入库方式： OAI收割
来源：金属研究所
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