Transfer, mixing and associated chemical and mechanical processes during the sliding of ductile materials

Rigney, D.A.

doi:10.1016/s0043-1648(00)00460-9

Cited by 400 publications

(174 citation statements)

References 28 publications

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“…At low loads the wear of the film is moderate and after failing at higher loads the wear is severe. The transition from moderate to severe regimes is due to the applied load, which at the transition reaches a critical value -this has also been reported for other tribological systems [26,27].…”

Section: Resultssupporting

confidence: 64%

Wear Resistance of Anodic Titanium Dioxide Films Produced on Ti-6Al-4V Alloy

Vera

Rosenberger

Schvezov

et al. 2015

Nanomaterials and Nanotechnology

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Ti-6Al-4V alloy with TiO 2 coating is the most commonly selected material to construct an aortic heart valve. Wear resistance is the main mechanical property to be evaluated for this purpose. In this paper, the wear resistance of TiO 2 thin films obtained by anodic oxidation of Ti-6Al-4V is evaluated. Anodic oxidation was performed at 20 V to 70 V with a H 2 SO 4 1 M electrolyte. The samples were thermally treated at 500°C for 1 h, and crystalline phases of TiO 2 were obtained. The wear was performed in a ball-on-flat reciprocating machine with a range of loads from 1 g f to 4 g f and times between 60 s and 1200 s, using a diamond sphere as counterface. The counterface oscillates at 0.5 Hz and 4 mm in amplitude. The wear is measured using a profilometer and is calculated as the worn volume. The wear resistance of the coated samples is larger than the substrate, and increases with thickness and with crystalline coating.

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Section: Resultssupporting

confidence: 64%

Wear Resistance of Anodic Titanium Dioxide Films Produced on Ti-6Al-4V Alloy

Vera

Rosenberger

Schvezov

et al. 2015

Nanomaterials and Nanotechnology

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“…Targeting the materials response during running-in, Rigney et al investigated the involved mechanisms leading to changes in near-surface structure and to the introduction of foreign elements as result of intermixing processes [3,[5][6][7]. The third body is the prerequisite for ultra-low wear rates and small coefficients of friction.…”

Section: Introductionmentioning

confidence: 99%

Tribofilms Forming in Oil-Lubricated Contacts

2016

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Abstract:The subject of the present paper is the characterization of third bodies of run-in systems. By means of continuous friction and wear measurement, lubricated steel-steel and steel-aluminum contacts were evaluated. Microstructure, chemical composition and response of the materials to shear were analyzed by XPS/AES and focused ion beam technique. After a proper running-in, both systems developed a third body. The third body differs significantly from the base materials. In addition to adapted microstructure and near-surface chemistry, the third body exhibited a substructure characterized by a near-surface zone that accommodates shear and a second, deeper region that ensures strengthening.

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“…Tribolayers were described in detail by Rigney [4,5] as a result of combination of severe plastic deformation (SPD), mechanical mixing (MM) and material transfer, while the formation mechanism of wear debris and mutual material transfer between both elements in the tribopair was originally proposed by Sasada [6,7]. The SPD process involved in the tribolayer formation was identified by Kapoor [8][9][10] as the accumulation of small plastic strains due to cyclic loading, which produce wear debris at the most superficial layer of the material.…”

Section: Introductionmentioning

confidence: 99%

Tribological and Microstructural Characterization of Ultrafine Layers Induced by Wear in Ductile Alloys

et al. 2016

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This work studies the ultrafine subsurface layer produced in Al-Sn and Cu alloys in contact with AISI9840 steel. The tribological tests were conducted at room temperature without lubrication in a coaxial tribometer. A first microstructural characterization was performed using conventional scanning electron microscopy (SEM) and atomic force microscopy (AFM). Grain refinement mapping was performed by means of Electron Backscattering Diffraction (EBSD). The wear process, during which tribolayers are formed, leads to significant differences between the structure of the sub-micrometrical layer below the tribolayer and that of the bulk. SEM images show severe mechanical mixing in the surface of the worn zones, whereas EBSD observations allow identifying the mechanically homogenized layers as a sub-micro-crystalline material with a cellular structure aligned along the sliding direction.

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Transfer, mixing and associated chemical and mechanical processes during the sliding of ductile materials

Cited by 400 publications

References 28 publications

Wear Resistance of Anodic Titanium Dioxide Films Produced on Ti-6Al-4V Alloy

Wear Resistance of Anodic Titanium Dioxide Films Produced on Ti-6Al-4V Alloy

Tribofilms Forming in Oil-Lubricated Contacts

Tribological and Microstructural Characterization of Ultrafine Layers Induced by Wear in Ductile Alloys

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