Mechanical analysis of the scratch test on elastic and perfectly plastic materials with the three-dimensional finite element modeling

Bucaille, J. L.; Felder, Éric; Hochstetter, Gilles

doi:10.1016/s0043-1648(01)00538-5

Cited by 239 publications

(135 citation statements)

References 14 publications

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“…Using the highest Young's modulus E [111] 5 113 GPa, 46 h 5 70.3°, 19,33 and r Yield 5 1.3 GPa, 14 a maximum value of approximately 40 is found. Knowing that for values close to 100, the deformation mechanisms are mainly plastic (close to metal behavior), whereas for values close to 10, the material behavior is mainly elastic, 44,47 it can be concluded that InP behavior lies between the elastic recovery and plastic deformation. Hence, in contrast to indentation tests, the transition edge, taking into account the scratching direction (arrow 1 in Fig.…”

Section: Discussionmentioning

confidence: 99%

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Analysis of onset of dislocation nucleation during nanoindentation and nanoscratching of InP

et al. 2011

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Nanoindentation and nanoscratching of an indium phosphide (InP) semiconductor surface was investigated via contact mechanics. Plastic deformation in InP is known to be caused by the nucleation, propagation, and multiplication of dislocations. Using selective electrochemical dissolution, which reveals dislocations at the semiconductor surface, the load needed to create the first dislocations in indentation and scratching can be determined. The experimental results showed that the load threshold to generate the first dislocations is twice lower in scratching compared to indentation. By modeling the elastic stress fields using contact mechanics based on Hertz's theory, the results during scratching can be related to the friction between the surface and the tip. Moreover, Hertz's model suggests that dislocations nucleate firstly at the surface and then propagate inside the bulk. The dislocation nucleation process explains the pop-in event which is characterized by a sudden extension of the indenter inside the surface during loading.

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Section: Discussionmentioning

confidence: 99%

“…In contrast, for an elastic material, there is partial support of the indenter in the trailing zone. 42,43 The type of material behavior during indentation and scratching is described by the so-called rheological factor X, 44,45 which is defined by:…”

Section: Discussionmentioning

confidence: 99%

Analysis of onset of dislocation nucleation during nanoindentation and nanoscratching of InP

et al. 2011

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“…In recent years quite a few such analyses have been presented. In this context, Bucaille et al [2001] analyze cone scratching of ideally plastic materials, and their results also indicate that the parameter as given in Figure 2 can indeed be used for correlating scratch parameters as well as indentation parameters. Furthermore, Bucaille et al [2001] find, as could be expected, that the strain levels at scratching are much higher than at indentation, but as only ideally-plastic material behavior is at issue, this finding is not explored in connection with the concept of representative strains.…”

Section: Introductionmentioning

confidence: 97%

On the numerics and correlation of scratch testing

Wredenberg

Larsson

2007

JOMMS

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A numerical strategy based on the finite element method and intended for an accurate analysis of the scratch test is presented. For simplicity, but not out of necessity, the material was described by classical von Mises elastoplasticity utilizing large deformation theory. Based on this strategy numerous results are presented and correlation of scratch properties is discussed within the framework of theory for indentation testing. Furthermore, the existence of a representative plastic strain in the spirit of Tabor was studied. The investigation also concerns details regarding frictional effects, normal vs. tangential scratch hardness, similarities and differences between indentation and scratch test characteristics as well as details regarding the behavior of local field variables at scratching.

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“…The prow of visco -elasto plastically deformed material pushed in front of indenter is contributing to combined effect of expulsed from orthogonally to the surface penetrating indenter and laterally displaced material to form on the side mater deformation sections (A1 and A2) illustrated in Figure 3b. This phenomenon is due to the complex deformation process of the ductile cast iron [24]. Therefore in some cases the part of the material can be transferred to the lateral ad frontal prow while the rest of the material is removed from the surface as cutting chips.…”

Section: Sclerometric Investigationsmentioning

confidence: 99%

Sclero-topometry Metrology in Valorisation of Waste Oil for Micro-machining of Ductile Cast Iron

Eymard¹,

Ignaszak²,

Mathia³

2013

Archives of Foundry Engineering

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During the time, the specific characteristics and the efficient lifetime of oil progressively decrease, due to complex pollution, ultimately making the oil unsuitable for the initial applications. The strategy to regenerate and to valorise waste oils is investigated using improved combinations of sclerometric and topometric tests on ductile nodular cast iron. Tribo-abrasive tests are performed in critical conditions, with base oil, waste oil and regenerated oil, of similar viscosities in order to discriminate their interfacial performances. The forms of the scratch traces indicate wear resistance and tendency to elasto-plastic deformation. The mechanisms of deformation and frictional behaviours were evaluated using optical and Scanning Electron Microscopy and measured for various tribological conditions with tactile and optical profilometry. The Energy Dispersive X ray Spectroscopy completes the chemical superficial distribution of pertinent elements. The surface topography metrology is used to characterize the scratch profiles and to determine the volume of the displaced and removed material, as well as maximum pit height. The originality of this paper is that it is a unique approach specifically devoted to transformer oil concerning tribological conditions.

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Mechanical analysis of the scratch test on elastic and perfectly plastic materials with the three-dimensional finite element modeling

Cited by 239 publications

References 14 publications

Analysis of onset of dislocation nucleation during nanoindentation and nanoscratching of InP

Analysis of onset of dislocation nucleation during nanoindentation and nanoscratching of InP

On the numerics and correlation of scratch testing

Sclero-topometry Metrology in Valorisation of Waste Oil for Micro-machining of Ductile Cast Iron

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