Scratch behavior of soft metallic materials

Pöhl, Fabian; Hardes, Corinna; Theisen, W.

doi:10.3934/matersci.2016.2.390

Cited by 21 publications

(18 citation statements)

References 6 publications

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“…18. Our MD results are in good agreement with the recent experimental work of scratching of pure iron [58]. The large increase in the friction coefficient upon increasing the scratch depth is clear evidence of transition of wear mechanism from plowing to cutting.…”

Section: Variation Of Nanoscratching Parameters With Scratch Depthsupporting

confidence: 90%

Atomistic Insights on the Wear/Friction Behavior of Nanocrystalline Ferrite During Nanoscratching as Revealed by Molecular Dynamics

et al. 2017

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Using embedded atom method potential, extensive large-scale molecular dynamics (MD) simulations of nanoindentation/nanoscratching of nanocrystalline (nc) iron have been carried out to explore grain size dependence of wear response. MD results show no clear dependence of the frictional and normal forces on the grain size, and the single-crystal (sc) iron has higher frictional and normal force compared to nc-samples. For all samples, the dislocation-mediated mechanism is the primary cause of plastic deformation in both nanoindentation/nanoscratch. However, secondary cooperative mechanisms are varied significantly according to grain size. Pileup formation was observed in the front of and sideways of the tool, and they exhibit strong dependence on grain orientation rather than grain size. Tip size has significant impact on nanoscratch characteristics; both frictional and normal forces monotonically increase as tip radii increase, while the friction coefficient value drops by about 38%. Additionally, the increase in scratch depth leads to an increase in frictional and normal forces as well as friction coefficient. To elucidate the relevance of indentation/scratch results with mechanical properties, uniaxial tensile test was performed for nc-samples, and the result indicates the existence of both the regular and inverse Hall-Petch relations at critical grain size of 110.9 Å . The present results suggest that indentation/scratch hardness has no apparent correlation with the mechanical properties of the substrate, whereas the plastic deformation has.

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Section: Variation Of Nanoscratching Parameters With Scratch Depthsupporting

confidence: 90%

Atomistic Insights on the Wear/Friction Behavior of Nanocrystalline Ferrite During Nanoscratching as Revealed by Molecular Dynamics

et al. 2017

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“…Also, a large part of the material is dragged by the indenter and located on the sides of the track, which is associated with stick-slip effects. Plastic deformation phenomena and material removal can be seen, mainly due to micro-cutting mechanisms, with an absence of adhesive or cohesive faults [31,32]. Similar behaviour is seen for the coatings deposited in the presence of nitrogen (see Figure 6).…”

Section: Resultssupporting

confidence: 58%

A Microstructural and Wear Resistance Study of Stainless Steel-Ag Coatings Produced through Magnetron Sputtering

Recco

Olaya

2018

Coatings

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This paper presents a study of the tribological properties of stainless steel coatings with varying Ag contents, deposited via magnetron sputtering. The growth of the coatings was done in Ar and Ar + N2 atmospheres in order to change the crystalline phase in the coating. The analysis of the chemical composition was performed using energy-dispersive X-ray spectroscopy (EDS) and the structural analysis was performed via X-ray diffraction (XRD). The adhesive wear resistance and the friction coefficient were evaluated using the ball-on-disk test with a ball of alumina. The coatings’ adhesion was measured with a scratch tester and the mechanical properties were evaluated with a nanoindenter. The morphology of the films and the wear track were characterized via scanning electron microscopy (SEM). By means of XRD, phases corresponding to the body-centred cubic (BCC) structure were found for the coatings deposited in an inert atmosphere and face-centred cubic (FCC) for those deposited in a reactive atmosphere. A more compact morphology was observed in coatings with a higher silver content. The values of the hardness increased with an increase in the silver content and the presence of nitrogen in the coatings. In the wear traces, mainly mechanisms of oxidative and adhesive wear and plastic deformation were found. The coefficient of friction decreased with an increase of silver in the coatings, whereas the wear rate decreased.

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“…The effect of the grain boundaries and twins (BUCKLEY, 1968;HARDES;THEISEN, 2016): these regions can show higher shear resistance, since they act as barriers for the dislocation movements and can thus raise the local COF.…”

Section: Damage Properties Obtained Via Scratch Tests: Failure Evaluamentioning

confidence: 99%

“…In terms of energy dissipation in two-phase materials with hard precipitates, one part is spent due to the micro-cracks formation on the second phase and matrix-hard phase interface, fracture and fragmentation of these particles. Several authors HARDES;THEISEN, 2016;MOHR;THEISEN, 2017) , 1978). Nevertheless, the strain energy decreased because the plastic deformation effects on the hard particles are minimum or non-existent.…”

Section: Heterogeneous Materialsmentioning

confidence: 99%

“…The plastic deformation of the AISI 310 austenitic matrix is accumulated preceding its hard phase position; yet there is no excessive plastic deformation of this matrix after the abrasive event over the nitride. A possible reason for this behaviour can be the high work-hardening of the austenitic stainless steels that tends to minimize the pile-up formation, which was inferred from the literature (HERNOT et al, 2006;HARDES;THEISEN, 2016) by indentation tests.…”

Section: Soft Matrix and Nitridesmentioning

confidence: 99%

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Evaluation of abrasive mechanisms in metallic alloys during scratch tests: a numerical-experimental study in micro-scale.

Seriacopi¹

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Scratch behavior of soft metallic materials

Cited by 21 publications

References 6 publications

Atomistic Insights on the Wear/Friction Behavior of Nanocrystalline Ferrite During Nanoscratching as Revealed by Molecular Dynamics

Atomistic Insights on the Wear/Friction Behavior of Nanocrystalline Ferrite During Nanoscratching as Revealed by Molecular Dynamics

A Microstructural and Wear Resistance Study of Stainless Steel-Ag Coatings Produced through Magnetron Sputtering

Evaluation of abrasive mechanisms in metallic alloys during scratch tests: a numerical-experimental study in micro-scale.

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