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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.
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
2017-03-01
Volume60Issue:3
ISSN1674-7348
AbstractStrengthening 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.
KeywordMolecular Dynamics Grain Boundary Strengthening Dislocations Nanoindentation Metals
DOI10.1007/s11433-016-0437-1
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000394526400005
WOS KeywordNANOCRYSTALLINE MATERIALS ; ATOMISTIC SIMULATIONS ; LATTICE DISLOCATIONS ; TENSILE DEFORMATION ; PLASTIC-DEFORMATION ; MECHANICAL-BEHAVIOR ; MAXIMUM STRENGTH ; METALS ; COPPER ; ALUMINUM
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China(11472286 ; Chinese Academy of Sciences(XDB22040503 ; National Key Basic Research Program of China(2012CB932203 ; 11672313 ; 2012CB937500)
DepartmentLNM材料介观力学性能的表征
Classification二类/Q1
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60571
Collection非线性力学国家重点实验室
Corresponding AuthorYuan, 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.
Recommended Citation
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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