Tribology behavior on scratch tests: Effects of yield strength

Feng, Biao

doi:10.1007/s40544-017-0148-8

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…It should be noted that the material pile-up in front of the scratch tip, commonly observed during the scratch process, has yet to been considered for the proposed analytical model. It is also known that the substrate recovery is closely correlated with the material properties such as the elastic modulus, yield strength [21,23], and viscoelastic characteristic [44][45][46][47][48], as well as the possible influence of the crystallinity on these properties [49], which are inherently important for the scratch friction performance of polymeric materials. A comprehensive analytical investigation of polymer scratching should be further conducted when considering the above factors.…”

Section: Effects Of the Substrate Recovery On The Scofmentioning

confidence: 99%

“…Pelletier et al [16] numerically demonstrated that the interfacial friction significantly affects the real contact area between the scratch tip and polymethylmethacrylate (PMMA) substrate. Feng et al [23,24] considered the combined Coulomb and plastic friction effect to study the impact of the yield strength on the scratch friction behavior.…”

Section: Introductionmentioning

confidence: 99%

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Analytical model of friction behavior during polymer scratching with conical tip

Jiang

Zhang

et al. 2018

Friction

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To investigate the effects of the contact geometry, interfacial friction, and substrate recovery on the behavior of polymer scratching using a conical tip, an analytical model is proposed. The normal stress acting on the contact surface between the tip and the substrate is described as a function of the included angle  , representing the angle between two planes across the axis of the conical tip, and the attack angle  , representing the angle between the conical surface and the substrate material surface. The effects of the rear contact geometry on the scratch friction between the tip and substrate, represented by recovery angle  , owing to the instantaneous elastic recovery of the polymer substrate, are also introduced. Validated by the experimental and numerical results from the literature, the proposed analytical model can describe well the scratch coefficient of friction (SCOF), which is defined as the ratio of the tangential force to the normal force. Meaningful guidance is provided to understand the scratch friction behavior.

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Section: Effects Of the Substrate Recovery On The Scofmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical model of friction behavior during polymer scratching with conical tip

Jiang

Zhang

et al. 2018

Friction

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Influence of Sample Tilt and Applied Load on Microscratch Behavior of Copper Under a Spherical Diamond Indenter

Liu

2021

Tribol Lett

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Subsurface deformation mechanism and the interplay relationship between strength-ductility and fretting wear resistance during fretting of a high-strength titanium alloy

Tong,

Hua,

Xie

et al. 2024

Friction

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Fretting wear damage of high-strength titanium fasteners has caused a large number of disastrous accidents. Traditionally, it is believed that both high strength and excellent ductility can reduce fretting wear damage. However, whether strength and ductility are contradictory or not and their appropriate matching strategy under the external applied normal stress (Fw) are still confusing problems. Here, by analyzing the subsurface-microstructure deformation mechanism of several samples containing various α precipitate features, for the first time, we design strategies to improve fretting damage resistance under different matching relation between Fw and the tensile strength of materials (Rm). It is found that when Fw is greater than Rm or Fw is nearly equivalent to Rm, the deformation mechanism mainly manifests as serious grain fragmentation of β and αGB constituents. Homogeneous deformation in large areas only reduces damage to a limited extent. It is crucial to improve the strength to resist cracking and wear, but it is of little significance to improve the ductility. However, when Fw is far less than Rm, coordinated deformation ability reflected by ductility plays a more important role. The deformation mechanism mainly manifests as localized deformation of β and αGB constituents (kinking induced by twinning and spheroidizing). A unique composite structure of nano-grained/lamellar layer and localized deformation transition layer reduces fretting damage by five times compared with a single nano-grained layer. Only when the strength is great enough, improving the plasticity can reduce wear. This study can provide a principle for designing fretting damage resistant alloys.

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Tribology behavior on scratch tests: Effects of yield strength

Cited by 8 publications

References 22 publications

Analytical model of friction behavior during polymer scratching with conical tip

Analytical model of friction behavior during polymer scratching with conical tip

Influence of Sample Tilt and Applied Load on Microscratch Behavior of Copper Under a Spherical Diamond Indenter

Subsurface deformation mechanism and the interplay relationship between strength-ductility and fretting wear resistance during fretting of a high-strength titanium alloy

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