Depth-sensing instrumented indentation with dual sharp indenters

Chollacoop, Nuwong; Dao, Ming; Suresh, S.

doi:10.1016/s1359-6454(03)00186-1

Cited by 303 publications

(278 citation statements)

References 25 publications

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“…They suggested that the number of the indenters with different apex angles should equal the number of unknown constants in the constitutive model. Several variations of the multiple indenter approach using conical or pyramidal indenters have also appeared in the literature [174][175][176].…”

Section: Probing Stress-strain Relationshipsmentioning

confidence: 99%

Scaling, dimensional analysis, and indentation measurements

Cheng

2004

Materials Science and Engineering: R: Reports

943

512

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We provide an overview of the basic concepts of scaling and dimensional analysis, followed by a review of some of the recent work on applying these concepts to modeling instrumented indentation measurements. Specifically, we examine conical and pyramidal indentation in elastic-plastic solids with power-law workhardening, in power-law creep solids, and in linear viscoelastic materials. We show that the scaling approach to indentation modeling provides new insights into several basic questions in instrumented indentation, including, what information is contained in the indentation load-displacement curves? How does hardness depend on the mechanical properties and indenter geometry? What are the factors determining piling-up and sinking-in of surface profiles around indents? Can stress-strain relationships be obtained from indentation load-displacement curves? How to measure time dependent mechanical properties from indentation? How to detect or confirm indentation size effects? The scaling approach also helps organize knowledge and provides a framework for bridging micro-and macroscales. We hope that this review will accomplish two purposes: (1) introducing the basic concepts of scaling and dimensional analysis to materials scientists and engineers, and (2) providing a better understanding of instrumented indentation measurements. # 2004 Published by Elsevier B.V.

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Section: Probing Stress-strain Relationshipsmentioning

confidence: 99%

Scaling, dimensional analysis, and indentation measurements

Cheng

2004

Materials Science and Engineering: R: Reports

943

512

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“…Using the different target L -h curves (see Fig. 3), Bucaille et al 10 and later Chollacoop et al 11 extended the method proposed by Dao et al 12 for forward and reverse analysis based on dual sharp indenters. As for the Dao et al method, the drawback of these methods is the problem with asymptotic analysis regarding limiting conditions such as elastic-perfect plastic and perfect elastic materials.…”

Section: Methods B: Determination Of the Elastic Plastic Propertiesmentioning

confidence: 99%

“…This method consists of using dimensionless functions to rebuild the s -e curve based on several points (e r ; s r ), from load-displacement curves of different conical indenters. Chollacoop et al, 11 Dao et al, 12 Tho et al, 60 and Zeng and Chiu 33 have demonstrated the robustness of the solution when the method is based on dual sharp indenters. This method has been used to assess stress strain properties of thin films 61,62 and the properties of the matrix of metal matrix composites.…”

Section: Methods B: Determination Of the Elastic Plastic Propertiesmentioning

confidence: 99%

“…7,8 This problem became the goal of several scientists, who recently advanced different models that estimate s -e curves from L -h curves. [8][9][10][11][12][13][14] The investigation of new and improved models allowing the determination of the plastic properties of metals is still widely studied today. [15][16][17][18][19][20] Reviews of the existing models have been published by Capehart and Cheng 21 and by Gouldstone et al 22 To increase the robustness of the semi-analytical approach presented here, multiple input data sets have been coupled, 10,11 and recently in-depth sensitivity analysis has been performed to determine the sensitivity and robustness of the results.…”

Section: Introductionmentioning

confidence: 99%

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Determination of plastic properties of metals by instrumented indentation using a stochastic optimization algorithm

et al. 2009

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A novel optimization approach, capable of extracting the mechanical properties of an elasto-plastic material from indentation data, is proposed. Theoretical verification is performed on two simulated configurations. The first is based on the analysis of the load-displacement data and the topography of the residual imprint of a single conical indenter. The second is based on the load-displacement data obtained from two conical indenters with different semi-angles. In both cases, a semi-analytical approach [e.g., Dao et al., Acta Mater. 49, 3899 (2001) and Bucaille et al., Acta Mater. 51, 1663] is used to estimate Young's modulus, yield stress, and strain hardening coefficient from the load-displacement data. An inverse finite element model, based on a commercial solver and a newly developed optimization algorithm based on a robust stochastic methodology, uses these approximate values as starting values to identify parameters with high accuracy. Both configurations use multiple data sets to extract the elastic-plastic material properties; this allows the mechanical properties of materials to be determined in a robust way.

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“…2 It is also possible to use indentation tests to determine the stress-strain curves of elastoplastic materials. [3][4][5][6][7][8][9][10][11][12][13][14][15] Besides being used on bulk materials, indentation tests can be used to probe the mechanical properties of thin films and coating systems. 16,17 The present research is relevant for the analysis of the conical indentation into an elastic half-space, which is useful when taking at least the following two aspects into consideration.…”

Section: Introductionmentioning

confidence: 99%

A precise correcting method for the study of the superhard material using nanoindentation tests

Cao

Dao

2007

J. Mater. Res.

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The accurate description of the indentation load-displacement relationship of an elastic sharp indenter indenting into an elastic half-space is critical for analyzing the nanoindentation data of superhard materials using the procedure proposed by Oliver and Pharr [J. Mater. Res. 7, 1564(1992 2296 (1999)], the errors induced by the application of reduced modulus should be considered at the same time in correcting the modified Sneddon's solution. In the present work, for the diamond indenter of 70.3°indenting into an elastic half-space with its Poisson's ratio varying from 0.0 to 0.5 and the ratio of the Young's modulus of the indented material to that of the diamond indenter, E material /E indenter , varying from 0 to 1, a set of new correction factors are proposed based on finite element analysis. The results reported here should provide insights into the analysis of the nanoindentation load-displacement data when using a diamond indenter to determine the hardness and Young's modulus of superhard materials.

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Depth-sensing instrumented indentation with dual sharp indenters

Cited by 303 publications

References 25 publications

Scaling, dimensional analysis, and indentation measurements

Scaling, dimensional analysis, and indentation measurements

Determination of plastic properties of metals by instrumented indentation using a stochastic optimization algorithm

A precise correcting method for the study of the superhard material using nanoindentation tests

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