| Uncovering the structural origin of shear banding in metallic glasses via tracing back to the critical glass transition process | |
Zhou YN(周雨诺)1,2; Yang ZY(杨增宇)3 ; Dai LH(戴兰宏)1,2,4
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| Corresponding Author | Zhou, Yu-Nuo() |
| Source Publication | PHYSICAL REVIEW MATERIALS
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| 2024-07-19 | |
| Volume | 8Issue:7Pages:14 |
| ISSN | 2475-9953 |
| Abstract | The emergence of shear bands is the universal cause of material failure in metallic glasses. In spite of relentless spirit, the structural origin, especially down to atomic level, of shear banding emergence is still an open question in disordered solids. Here, careful atomic simulations are carried out in Cu50Zr50 metallic glasses with various cooling histories. The icosahedral network formed by connected icosahedral clusters is recognized as the structural link between the glass formation process and shear banding emergence. First of all, it is found that the dominant structural evolution of glass transition is the competition between newly activated icosahedral clusters and the connection of existing ones. The glassy state as well as dynamics is then characterized by the level of connectivity of icosahedral clusters. This is evidenced by the power-law relation between the connectivity level and the relaxation time. Such connected icosahedral network is further found as the structural origin of the emergent inhomogeneous deformation field as well as the ultimate shear banding emergence upon loading. The emergence of shear bands is thus demonstrated as the collapse of the icosahedral network, which can be characterized as a "core-shell" structure in terms of our previously developed two-term gradient model. It is carefully demonstrated that atoms in the shell participate in dilatation and shear events while atoms in the inner core mainly undertake rotation motion. Our findings elaborate detailed physical images by tracing back to the critical glass transition process which provides a perspective in understanding the shear banding emergence. |
| DOI | 10.1103/PhysRevMaterials.8.073603 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001273488200002 |
| WOS Keyword | MEDIUM-RANGE ORDER ; LOCAL ORDER ; DYNAMICS ; DEFORMATION ; FLUCTUATION ; PLASTICITY ; FLOW ; ZR |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| Funding Project | Strategic Priority Research Pro-gram[11988102] ; Key Research Program of Frontier Sciences[XDB22040302] ; Key Research Program of Frontier Sciences[XDB22040303] ; Opening Project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology)[QYZDJSSWJSC011] ; Qisun Science Foundation of National Natural Science Foundation of China[KFJJ23-03M] ; [U2141204] |
| Funding Organization | Strategic Priority Research Pro-gram ; Key Research Program of Frontier Sciences ; Opening Project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) ; Qisun Science Foundation of National Natural Science Foundation of China |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Zhou, Yu-Nuo |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96161 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.China Acad Engn Phys, Inst Fluid Phys, Mianyang 621999, Sichuan, Peoples R China; 4.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Zhou YN,Yang ZY,Dai LH. Uncovering the structural origin of shear banding in metallic glasses via tracing back to the critical glass transition process[J]. PHYSICAL REVIEW MATERIALS,2024,8,7,:14.Rp_Au:Zhou, Yu-Nuo |
| APA | 周雨诺,杨增宇,&戴兰宏.(2024).Uncovering the structural origin of shear banding in metallic glasses via tracing back to the critical glass transition process.PHYSICAL REVIEW MATERIALS,8(7),14. |
| MLA | 周雨诺,et al."Uncovering the structural origin of shear banding in metallic glasses via tracing back to the critical glass transition process".PHYSICAL REVIEW MATERIALS 8.7(2024):14. |
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