Strengthening effects of various grain boundaries with nano-spacing as barriers of dislocation motion from molecular dynamics simulations

doi:10.1007/s11433-016-0437-1

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	Strengthening effects of various grain boundaries with nano-spacing as barriers of dislocation motion from molecular dynamics simulations
	Yuan FP(袁福平); Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.; Yuan, FP (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China.
发表期刊	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2017-03-01
卷号	60 期号:3
ISSN	1674-7348
摘要	Strengthening in metals is traditionally achieved through the controlled creation of various grain boundaries (GBs) such as low-angle GBs high-angle GBs and twin boundaries (TBs). In the present study a series of large-scale molecular dynamics simulations with spherical nanoindentation and carefully designed model were conducted to investigate and compare the strengthening effects of various GBs with nano-spacing as barriers of dislocation motion. Simulation results showed that high-angle twist GBs and TBs are similar barriers and low-angle twist GBs are less effective in obstructing dislocation motion. Corresponding atomistic mechanisms were also given. At a certain indentation depth dislocation transmission and dislocation nucleation from the other side of boundaries were observed for low-angle twist GBs whereas dislocations were completely blocked by high-angle twist GBs and TBs at the same indentation depth. The current findings should provide insights for comprehensive understanding of the strengthening effects of various GBs at nanoscale.
关键词	Molecular Dynamics Grain Boundary Strengthening Dislocations Nanoindentation Metals
DOI	10.1007/s11433-016-0437-1
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:000394526400005
关键词[WOS]	NANOCRYSTALLINE MATERIALS ; ATOMISTIC SIMULATIONS ; LATTICE DISLOCATIONS ; TENSILE DEFORMATION ; PLASTIC-DEFORMATION ; MECHANICAL-BEHAVIOR ; MAXIMUM STRENGTH ; METALS ; COPPER ; ALUMINUM
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
项目资助者	National Natural Science Foundation of China(11472286 ; Chinese Academy of Sciences(XDB22040503 ; National Key Basic Research Program of China(2012CB932203 ; 11672313 ; 2012CB937500)
课题组名称	LNM材料介观力学性能的表征
论文分区	二类/Q1
力学所作者排名	1
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60571
专题	非线性力学国家重点实验室
通讯作者	Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.; Yuan, FP (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Yuan FP,Yuan, FP ,Yuan, FP . Strengthening effects of various grain boundaries with nano-spacing as barriers of dislocation motion from molecular dynamics simulations[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2017,60,3,.
APA	袁福平,Yuan, FP ,&Yuan, FP .(2017).Strengthening effects of various grain boundaries with nano-spacing as barriers of dislocation motion from molecular dynamics simulations.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,60(3).
MLA	袁福平,et al."Strengthening effects of various grain boundaries with nano-spacing as barriers of dislocation motion from molecular dynamics simulations".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 60.3(2017).

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