| The Effect of Impact Load on the Atomistic Scale Fracture Behavior of Nanocrystalline bcc Iron | |
Zhao ZF(赵志福)1,2; Wang, Zhen1; Bie, Yehui3; Liu XM(刘小明)1,2 ; Wei, Yueguang3
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| Corresponding Author | Zhao, Zhifu([email protected]) |
| Source Publication | NANOMATERIALS
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| 2024-02-01 | |
| Volume | 14Issue:4Pages:11 |
| Abstract | Nanocrystalline metals have many applications in nanodevices, especially nanoscale electronics in aerospace. Their ability to resist fracture under impact produced by environmental stress is the main concern of nanodevice design. By carrying out molecular dynamics simulations under different fast loading rates, this work examines the effect of impact load on the fracture behavior of nanocrystalline bcc iron at an atomistic scale. The results show that a crack propagates with intergranular decohesion in nanocrystalline iron. With the increase in impact load, intergranular decohesion weakens, and plastic behaviors are generated by grain boundary activities. Also, the mechanism dominating plastic deformation changes from the atomic slip at the crack tip to obvious grain boundary activities. The grain boundary activities produced by the increase in impact load lead to an increase in the threshold energy for crack cleavage and enhance nanocrystalline bcc iron resistance to fracture. Nanocrystalline bcc iron can keep a high fracture ductility under a large impact load. |
| Keyword | molecular dynamics simulation nanocrystalline iron impact load fracture resistance fracture ductility |
| DOI | 10.3390/nano14040370 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:001168435500001 |
| WOS Keyword | MOLECULAR-DYNAMICS SIMULATION ; INTERGRANULAR FRACTURE ; TENSILE PROPERTIES ; GRAIN ; DEFORMATION ; NUCLEATION ; TOUGHNESS ; COPPER |
| WOS Research Area | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| WOS Subject | Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied |
| Funding Project | National Natural Science Foundation of China |
| Funding Organization | National Natural Science Foundation of China |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Zhao, Zhifu |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/94535 |
| 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 LNM, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Peking Univ, Coll Engn, Dept Mech & Engn Sci, Beijing 100871, Peoples R China |
| Recommended Citation GB/T 7714 | Zhao ZF,Wang, Zhen,Bie, Yehui,et al. The Effect of Impact Load on the Atomistic Scale Fracture Behavior of Nanocrystalline bcc Iron[J]. NANOMATERIALS,2024,14,4,:11.Rp_Au:Zhao, Zhifu |
| APA | 赵志福,Wang, Zhen,Bie, Yehui,刘小明,&Wei, Yueguang.(2024).The Effect of Impact Load on the Atomistic Scale Fracture Behavior of Nanocrystalline bcc Iron.NANOMATERIALS,14(4),11. |
| MLA | 赵志福,et al."The Effect of Impact Load on the Atomistic Scale Fracture Behavior of Nanocrystalline bcc Iron".NANOMATERIALS 14.4(2024):11. |
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