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The Effect of Impact Load on the Atomistic Scale Fracture Behavior of Nanocrystalline bcc Iron

文献类型：期刊论文

作者Zhao, Zhifu2,3; Wang, Zhen3; Bie, Yehui1; Liu, Xiaoming2,3; Wei, Yueguang1; Liu XM(刘小明)
刊名NANOMATERIALS
出版日期2024-02-01
卷号14期号:4页码:11
关键词molecular dynamics simulation nanocrystalline iron impact load fracture resistance fracture ductility
DOI10.3390/nano14040370
通讯作者Zhao, Zhifu(zhaozhifu@imech.ac.cn)
英文摘要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.
WOS关键词MOLECULAR-DYNAMICS SIMULATION ; INTERGRANULAR FRACTURE ; TENSILE PROPERTIES ; GRAIN ; DEFORMATION ; NUCLEATION ; TOUGHNESS ; COPPER
资助项目National Natural Science Foundation of China
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
WOS记录号WOS:001168435500001
资助机构National Natural Science Foundation of China
源URL[http://dspace.imech.ac.cn/handle/311007/94534]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Zhao, Zhifu
作者单位1.Peking Univ, Coll Engn, Dept Mech & Engn Sci, Beijing 100871, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Zhifu,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.
APA Zhao, Zhifu,Wang, Zhen,Bie, Yehui,Liu, Xiaoming,Wei, Yueguang,&刘小明.(2024).The Effect of Impact Load on the Atomistic Scale Fracture Behavior of Nanocrystalline bcc Iron.NANOMATERIALS,14(4),11.
MLA Zhao, Zhifu,et al."The Effect of Impact Load on the Atomistic Scale Fracture Behavior of Nanocrystalline bcc Iron".NANOMATERIALS 14.4(2024):11.

入库方式： OAI收割

来源：力学研究所

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