Time dependent plasticity at real nanoscale deformation

F. Wang; P. Huang; K. W. Xu

doi:10.1063/1.2730735

Time dependent plasticity at real nanoscale deformation

F. Wang
, P. Huang
, K. W. Xu

School of Materials Science and Engineering

Xi'an Jiaotong University

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Nanoindentation creep test has been carried out in displacement of 4-100 nm regime at single grained (SG) Cu and ultrafine grained (UFG) Cu. The strain rate sensitivity m has been determined and exhibits strong indentation size effect. The magnitudes of m in UFG and SG Cu are comparable and can be simulated by the same curve below a critical depth. The authors experimental findings and analysis support that the tip-sample diffusion is the dominant mechanism below a critical indentation depth and the effect of grain boundary media mechanisms will emerge as the indenter penetrates deeper.

Original language	English
Article number	161921
Journal	Applied Physics Letters
Volume	90
Issue number	16
DOIs	https://doi.org/10.1063/1.2730735
State	Published - 2007

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title = "Time dependent plasticity at real nanoscale deformation",

abstract = "Nanoindentation creep test has been carried out in displacement of 4-100 nm regime at single grained (SG) Cu and ultrafine grained (UFG) Cu. The strain rate sensitivity m has been determined and exhibits strong indentation size effect. The magnitudes of m in UFG and SG Cu are comparable and can be simulated by the same curve below a critical depth. The authors experimental findings and analysis support that the tip-sample diffusion is the dominant mechanism below a critical indentation depth and the effect of grain boundary media mechanisms will emerge as the indenter penetrates deeper.",

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N2 - Nanoindentation creep test has been carried out in displacement of 4-100 nm regime at single grained (SG) Cu and ultrafine grained (UFG) Cu. The strain rate sensitivity m has been determined and exhibits strong indentation size effect. The magnitudes of m in UFG and SG Cu are comparable and can be simulated by the same curve below a critical depth. The authors experimental findings and analysis support that the tip-sample diffusion is the dominant mechanism below a critical indentation depth and the effect of grain boundary media mechanisms will emerge as the indenter penetrates deeper.

AB - Nanoindentation creep test has been carried out in displacement of 4-100 nm regime at single grained (SG) Cu and ultrafine grained (UFG) Cu. The strain rate sensitivity m has been determined and exhibits strong indentation size effect. The magnitudes of m in UFG and SG Cu are comparable and can be simulated by the same curve below a critical depth. The authors experimental findings and analysis support that the tip-sample diffusion is the dominant mechanism below a critical indentation depth and the effect of grain boundary media mechanisms will emerge as the indenter penetrates deeper.

UR - https://www.scopus.com/pages/publications/34247350012

U2 - 10.1063/1.2730735

DO - 10.1063/1.2730735

M3 - 文章

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SN - 0003-6951

VL - 90

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 16

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Time dependent plasticity at real nanoscale deformation

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