The influence of plastic hardening on surface deformation modes around Vickers and spherical indents

Alcalá, Jorge; Barone, A.; Anglada, M.

doi:10.1016/s1359-6454(00)00140-3

Cited by 188 publications

(179 citation statements)

References 21 publications

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“…Another approach consists in taking into account the residual deformation of the specimen's surface at the conclusion of the indentation test, as additional information to complement the P-h curve [15,16] since different materials generally exhibit diverse plastic piling-up (Fig.2) or elastic sink-in effects. A review of existing literature reveals extensive research on combining the traditional indentation test with the mapping of residual deformation (indentation imprint) in order to provide more reliable information for the identification of material properties [4,[17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Identification of material properties using indentation test and shape manifold learning approach

Liang

Breitkopf

Raghavan

et al. 2015

Computer Methods in Applied Mechanics and Engineering

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The conventional approach for the identification of the work hardening properties of a material by an indentation test usually relies on the force-displacement curve. However, finite element modeling of the indenter-specimen system is a complex task, and the unicity of the solution to the inverse problem of identifying material parameters using the force-displacement curve is not always guaranteed. Also, the precise measurement of the displacement of the indenter tip requires the determination of the indenter frame compliance and indenter tip deformation. To alleviate these problems, we propose in this work an approach based solely on the 3D indentation imprint shape measured after indenter withdrawal, rather than relying on the minimization of the pointwise discrepancy between the experimental and simulated indentation curve. We first build a mathematical "shape space" of indentation shapes in which a lower-dimensional manifold of imprints admissible according to a postulated material constitutive law is approximated. Then, we solve the inverse problem by using a series of predictor-corrector algorithms minimizing the distance between the estimated solution and the experimental imprint in this shape space. We finally apply the proposed approach to indentation tests using a spherical tip indenter on two different materials: a C100 steel specimen and a specimen of the AU4G (AA2017) aluminium alloy.

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Section: Introductionmentioning

confidence: 99%

Identification of material properties using indentation test and shape manifold learning approach

Liang

Breitkopf

Raghavan

et al. 2015

Computer Methods in Applied Mechanics and Engineering

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“…The occurrence of such pile-up and sink-in patterns is usually interpreted in terms of the strain-hardening behavior of the indented material [1][2][3][4]. According to these studies the surface around indents tends to pile up against the indenter in cases where the indented sample is heavily pre-strained with only little reserves for further work-hardening or has generally a low strain-hardening potential.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, when the sample is fully annealed and has a high strain-hardening potential, the surface around indents tends to sink in e.g. [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Orientation dependence of nanoindentation pile-up patterns and of nanoindentation microtextures in copper single crystals

Wang¹,

Raabe²,

Klüber³

et al. 2004

Acta Materialia

264

149

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“…In brittle materials indented with a Berkovich tip, surface examination of residual imprints by Atomic Force Microscopy (AFM) can reveal some typical features, such as: surface deformation effects (sink-in [13,14]), microcracks or damage inside the imprints [15], fracture mechanisms such as radial cracks emanating from the imprint corners [15], or chipping [16].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of highly textured porous Ni–YSZ and Co–YSZ cermets produced from directionally solidified eutectics

Roa

Laguna‐Bercero

Larrea

et al. 2011

Ceramics International

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It is well known that several ceramic materials develop an usual; and sometimes unique; combination of properties as a result of mixing different phases with similar expansion coefficients. Sometimes they are elastically stiff, have relatively low thermal expansion coefficients, good thermal and electrical conductivities, and are resistant to chemical attack.As this paper will show, their mechanical properties are also enhanced. Nanoindentation technique is used to measure the mechanical properties for each phase of NiO-YSZ and CoO-YSZ eutectics produced by the laser floating zone technique, and also the analogues Ni-YSZ and Co-YSZ cermets produced by reduction from the eutectics precursors.The different tests have been performed at a constant indentation depth of 100nm, in order to obtain a residual imprint lower than the size of the secondary phase and extract the hardness and Young's modulus using the Oliver and Pharr approach. Moreover, several tests have been 2 performed at 2000nm of indentation range to obtain the general response of each material. In this case, only hardness and Young's modulus of the composite can be determined. Finally, the different residual imprints have been visualized by Atomic Force Microscopy to correlate each mechanical property with each phase.

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The influence of plastic hardening on surface deformation modes around Vickers and spherical indents

Cited by 188 publications

References 21 publications

Identification of material properties using indentation test and shape manifold learning approach

Identification of material properties using indentation test and shape manifold learning approach

Orientation dependence of nanoindentation pile-up patterns and of nanoindentation microtextures in copper single crystals

Mechanical properties of highly textured porous Ni–YSZ and Co–YSZ cermets produced from directionally solidified eutectics

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