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Strong Strain Hardening in Nanocrystalline Nickel
Wu XL(武晓雷); Zhu YT; Wei YG(魏悦广); Wei Q
Source PublicationPhysical Review Letters
2009
Volume103Issue:20Pages:205504
ISSN0031-9007
AbstractLow strain hardening has hitherto been considered an intrinsic behavior for most nanocrystalline (NC) metals, due to their perceived inability to accumulate dislocations. In this Letter, we show strong strain hardening in NC nickel with a grain size of 20 nm under large plastic strains. Contrary to common belief, we have observed significant dislocation accumulation in the grain interior. This is enabled primarily by Lomer-Cottrell locks, which pin the lock-forming dislocations and obstruct islocation. motion. These observations may help with developing strong and ductile NC metals and alloys.
Subject Area本构关系
DOI10.1103/PhysRevLett.103.205504
Indexed BySCI
Language英语
WOS IDWOS:000271864600029
WOS KeywordMOLECULAR-DYNAMICS SIMULATION ; HIGH-TENSILE DUCTILITY ; SINGLE-CRYSTALS ; METALS ; STRENGTH ; COPPER ; DEFORMATION ; NANOSCALE ; JUNCTIONS ; MECHANISM
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Citation statistics
Cited Times:105[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/28757
Collection非线性力学国家重点实验室
Corresponding AuthorWu XL(武晓雷)
Recommended Citation
GB/T 7714
Wu XL,Zhu YT,Wei YG,et al. Strong Strain Hardening in Nanocrystalline Nickel[J]. Physical Review Letters,2009,103(20):205504.
APA 武晓雷,Zhu YT,魏悦广,&Wei Q.(2009).Strong Strain Hardening in Nanocrystalline Nickel.Physical Review Letters,103(20),205504.
MLA 武晓雷,et al."Strong Strain Hardening in Nanocrystalline Nickel".Physical Review Letters 103.20(2009):205504.
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