Tribological performance of surfaces enhanced by texturing and nitrogen implantation

Liu, De-rong; Zhang, Qi; Qin, Zhenbo; Luo, Qiang; Wu, Zhong; Liu, Lei

doi:10.1016/j.apsusc.2015.11.245

Cited by 21 publications

(4 citation statements)

References 30 publications

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“…From the Bragg equation, the smaller the diffraction angle, the larger the lattice plane distance. Due to the large radius of RE atoms, the iron lattice in steel is distorted [39]. Moreover, the (110) α diffraction peak showed and obvious increase, which indicated that the preferred orientation of cryptocrystalline martensite was (110) α after RE ion implantation, and its content also increased.…”

Section: Discussionmentioning

confidence: 99%

Study of the Catalytic Strengthening of a Vacuum Carburized Layer on Alloy Steel by Rare Earth Pre-Implantation

Cai-yun

Xing³

et al. 2019

Materials

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Conventional carburizing has disadvantages, such as high energy consumption, large deformation of parts, and an imperfect structure of the carburizing layer. Hence, a rare earth ion pre-implantation method was used to catalyze and strengthen the carburized layer of 20Cr2Ni4A alloy steel. In this study, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive microanalysis (EDS), transmission electron microscopy (TEM), and Rockwell/Vickers hardness testing were used to analyze the microstructure, phase composition, retained austenite content, hardness, carburized layer thickness, and carbon diffusion. The results showed that lanthanum and yttrium ions implanted into the 20Cr2Ni4A steel formed solid solutions of rare earth ions and a large number of dislocations, which improved the diffusion coefficient of carbon elements on the carburized surface and the uniformity of the carbon distribution. Simultaneously, rare earth ion implantation improved the structure and hardness of the vacuum carburized layer. Compared to the lanthanum ion implantation, yttrium ion implantation caused the structure of the carburized layer to be finer, and the carbon diffusion coefficient increased by 1.17 times; in addition, the surface hardness of the carburized layer was 61.8 HRC.

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Section: Discussionmentioning

confidence: 99%

Study of the Catalytic Strengthening of a Vacuum Carburized Layer on Alloy Steel by Rare Earth Pre-Implantation

Cai-yun

Xing³

et al. 2019

Materials

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“…Under dry sliding conditions, the frictional resistance can be expressed as the sum of two terms, the shearing and the ploughing process. According to Bowden and Tabor [22], the friction coefficient is given by Ff=Arτs+Apτp, Ar=LH, where A r is the real contact area, A p is the furrow area, τ s is the shear strength of a unit area, τ p is the furrow force of a unit area, L is the applied normal load, and H is the metallic hardness.…”

Section: Resultsmentioning

confidence: 99%

“…They then had no influence on the frictional property of testing specimens. To date, nitrogen ion implantation, anodic oxidation, high-velocity oxy fuel spraying, physical vapor deposition (PVD), and laser cladding have been employed on metal alloys after micro-texturing to improve their antifriction property [21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

Surface Characterization and Tribological Performance of Anodizing Micro-Textured Aluminum-Silicon Alloys

et al. 2019

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Eutectic aluminum-silicon alloys present high frictional coefficient and a high wear rate due to the low hardness under sliding friction conditions. In this paper, the eutectic aluminum-silicon alloy was textured firstly by micro-milling operations. Then, the micro-textured specimen was subjected to anodizing to fabricate alumina films. The surface topography, surface roughness, and bearing area ratio of micro-textured and anodizing micro-textured specimens were measured and characterized. For the anodizing micro-textured specimens, the surface roughness and superficial hardness increase compared with those for micro-textured ones. Tribological tests indicate that anodizing micro-textured samples present lower friction coefficient of 0.37 than that of flat samples of 0.43 under dry sliding conditions. However, they exhibit higher friction coefficient at 0.16 than that of flat samples of 0.13 under oil-lubricated conditions. The difference between the friction coefficient of anodizing micro-textured and flat samples under dry and oil-lubricated conditions is ascribed to the influence mechanism of surface roughness, bearing area ratio curves, and its relative parameters on the tribological performance of testing samples. The dry sliding friction coefficient has a positive correlation with bearing area ratio curves, while they present negative correlation with bearing area ratio curves under oil-lubricated conditions. The synergy method treated with micro-milling and anodizing provides an effective approach to enhance the dry sliding friction property of eutectic aluminum-silicon alloys.

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“…However, the single property-improving with surface strengthening technology or the single appearance-improving with surface machining is difficult to satisfy with the high anti-wear performance requirements of spherical plain bearings used in the special fields with high machining accuracy and extreme work conditions, especially for the fields of aeronautics–astronautics. Therefore, a lot of researches are conducted with regard to the synergy of two or more methods, such as the synergy of micro-texture and surface alloying, the synergy of surface modification and coating technology, 14 the synergy of surface micro-texture and ion nitriding, 15 the synergy of surface micro-texture and diamond-like film, the synergy of coating and surface micro-texture, 16 the synergy of surface micro-texture and surface lubrication, 17 the synergy of micro-dimpled surface and surface mechanical strengthening, 18 and other compound strengthening techniques. On one hand, they can improve the micro-hardness of the workpiece surface obviously, and on the other hand, they have a great significance in improving the lubrication conditions, collect wear debris, prevent local overheating, and improve wear resistance performance of the fundamental parts.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effects of surface strengthening and surface micro-texture on aviation spherical plain bearing tribological properties

Yuan

Qin

Денг

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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With an increase in extreme and complex work conditions in the fields of aircraft industry and high-speed train, single surface strengthening or single surface machining is not satisfactory with repeated requests of spherical plain bearings, which results in serious wear. Therefore, in this paper, a compound method of ultrasonic surface rolling process and surface texture was proposed on the basis of investigating the wear mechanism to meet the tribological property requirements of spherical plain bearings. The theoretical and experimental results show that low micro-hardness and low shear strength of surface material, rough surface, and poor lubrication are the important factors contributing to the wear of spherical plain bearings. The surface roughness Ra and Rz of processed spherical plain bearings are reduced to 0.02 mm and 0.14 mm from 0.35 mm and 2.1 mm, respectively, and the micro-hardness of surface material is increased by about 20%. The double-sine micro-textures with the width of 120 mm and the depth of 20 mm produced by laser machine, together with the circular groove, provide satisfactory lubrication for the spherical plain bearings. Finally, the wear resistance properties of spherical plain bearings were increased by more than 55%. The proposed synergistic methods have great advantages in improving the tribological properties of key fundamental components, especially for spherical plain bearings.

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Tribological performance of surfaces enhanced by texturing and nitrogen implantation

Cited by 21 publications

References 30 publications

Study of the Catalytic Strengthening of a Vacuum Carburized Layer on Alloy Steel by Rare Earth Pre-Implantation

Study of the Catalytic Strengthening of a Vacuum Carburized Layer on Alloy Steel by Rare Earth Pre-Implantation

Surface Characterization and Tribological Performance of Anodizing Micro-Textured Aluminum-Silicon Alloys

Synergistic effects of surface strengthening and surface micro-texture on aviation spherical plain bearing tribological properties

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