Correlation between the flow stress and the nominal indentation hardness of soft metals

Yanping CAO; Zhenyu XUE; Xi CHEN; Dierk RAABE

doi:10.1016/j.scriptamat.2008.04.039

Correlation between the flow stress and the nominal indentation hardness of soft metals

Yanping CAO^*, Zhenyu XUE, Xi CHEN^*, Dierk RAABE

^*Corresponding author for this work

Research output: Journal Publications › Journal Article (refereed) › peer-review

27 Citations (Scopus)

Abstract

For the sharp indentation of soft metals, we first reveal a simple relation between the nominal hardness, H_n, and the flow stress, σ_r, i.e. H_n = 4.4σ_r. Further, using the relation proposed herein instead of the well-known Tabor's relation and the analysis performed by Nix/Gao on the geometrically necessary dislocations, a simple indentation nominal hardness-depth relation at the microscale is obtained. The model agrees well with the experiment data in the literature and the simulation based on a strain gradient theory.

Original language	English
Pages (from-to)	518-521
Number of pages	4
Journal	Scripta Materialia
Volume	59
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2008.04.039
Publication status	Published - Sept 2008
Externally published	Yes

Funding

Y.P.C. acknowledges the helpful discussion with Prof. W.D. Nix about the present work and the financial support from the Max Planck Society. The authors thank Dr. K. Durst in the University of Erlangen for his great help in providing the experimental data.

Keywords

Microindentation
Nominal hardness
Size effects

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10.1016/j.scriptamat.2008.04.039

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title = "Correlation between the flow stress and the nominal indentation hardness of soft metals",

abstract = "For the sharp indentation of soft metals, we first reveal a simple relation between the nominal hardness, Hn, and the flow stress, σr, i.e. Hn = 4.4σr. Further, using the relation proposed herein instead of the well-known Tabor's relation and the analysis performed by Nix/Gao on the geometrically necessary dislocations, a simple indentation nominal hardness-depth relation at the microscale is obtained. The model agrees well with the experiment data in the literature and the simulation based on a strain gradient theory.",

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author = "Yanping CAO and Zhenyu XUE and Xi CHEN and Dierk RAABE",

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TY - JOUR

T1 - Correlation between the flow stress and the nominal indentation hardness of soft metals

AU - CAO, Yanping

AU - XUE, Zhenyu

AU - CHEN, Xi

AU - RAABE, Dierk

PY - 2008/9

Y1 - 2008/9

N2 - For the sharp indentation of soft metals, we first reveal a simple relation between the nominal hardness, Hn, and the flow stress, σr, i.e. Hn = 4.4σr. Further, using the relation proposed herein instead of the well-known Tabor's relation and the analysis performed by Nix/Gao on the geometrically necessary dislocations, a simple indentation nominal hardness-depth relation at the microscale is obtained. The model agrees well with the experiment data in the literature and the simulation based on a strain gradient theory.

AB - For the sharp indentation of soft metals, we first reveal a simple relation between the nominal hardness, Hn, and the flow stress, σr, i.e. Hn = 4.4σr. Further, using the relation proposed herein instead of the well-known Tabor's relation and the analysis performed by Nix/Gao on the geometrically necessary dislocations, a simple indentation nominal hardness-depth relation at the microscale is obtained. The model agrees well with the experiment data in the literature and the simulation based on a strain gradient theory.

KW - Microindentation

KW - Nominal hardness

KW - Size effects

UR - http://www.scopus.com/inward/record.url?scp=46049112668&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2008.04.039

DO - 10.1016/j.scriptamat.2008.04.039

M3 - Journal Article (refereed)

AN - SCOPUS:46049112668

SN - 1359-6462

VL - 59

SP - 518

EP - 521

JO - Scripta Materialia

JF - Scripta Materialia

IS - 5

ER -

Correlation between the flow stress and the nominal indentation hardness of soft metals

Abstract

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Keywords

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