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

doi:10.3390/nano14040370

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	The Effect of Impact Load on the Atomistic Scale Fracture Behavior of Nanocrystalline bcc Iron
	Zhao, Zhifu 2,3; Wang, Zhen 3; Bie, Yehui 1; Liu, Xiaoming 2,3; Wei, Yueguang 1
刊名	NANOMATERIALS
	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
DOI	10.3390/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.
资助项目	National Natural Science Foundation of China
WOS关键词	MOLECULAR-DYNAMICS SIMULATION ; INTERGRANULAR FRACTURE ; TENSILE PROPERTIES ; GRAIN ; DEFORMATION ; NUCLEATION ; TOUGHNESS ; COPPER
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
内容类型	期刊论文
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.(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.