Influence of counterbody material on fretting wear behaviour of uncoated and diamond-like carbon-coated Ti-6Al-4V:
01 Feb 2009-Vol. 223, Iss: 2, pp 227-231
TL;DR: Fretting wear tests were carried out at different normal loads on uncoated and diamond-like carbon (DLC)-coated Ti-6Al-4V samples against two counterbody materials: alumina and ultra high molecular weight polyethylene (UHMWPE).
Abstract: Fretting wear tests were carried out at different normal loads on uncoated and diamond-like carbon (DLC)-coated Ti-6Al-4V samples against two counterbody materials: alumina and ultra high m...
TL;DR: In this article, the surface mechanical attrition treatment (SMAT) was carried out on Ti-6Al-4V surfaces to achieve surface nanocrystallization, which resulted in high hardness, low tangential force coefﬁcient (TFC) and more TiO 2 layer, fretting wear resistance of treated samples was higher than that of untreated samples.
TL;DR: In this article, the effect of counterbody material on fretting wear resistance of 304 stainless steel is investigated, and the results showed that the 304 steel samples fretted with alumina counterbody exhibited higher wear volume due to higher contact stress and tribochemical reaction between the tribopair.
Abstract: Effect of counterbody material on fretting wear resistance of 304 stainless steel is investigated in the present study. Fretting wear experiments were carried out at different normal loads on 304 stainless steel samples for 25 000 cycles using four different counterbody materials (alumina, SAE 52100 steel, 304 stainless steel and Ti–6Al–4V). At different normal loads, different fretting regimes were observed: gross slip at 1·96 and 4·98 N, mixed stick slip at 9·8 and 14·7 N and near stick at 19·6 N. Samples fretted against alumina counterbody exhibited higher tangential force coefficient values compared to those fretted with other counterbodies. The 304 stainless steel samples fretted with alumina counterbody exhibited higher wear volume due to higher contact stress and tribochemical reaction between the tribopair. The samples fretted against both 304 stainless steel and SAE 52100 steel counterbodies exhibited almost similar wear volume due to similar levels of adhesion between the contacting mate...
01 Feb 2016
TL;DR: Structural properties, electrochemical and tribological behaviours of the nitrided pure titanium specimens were comparatively investigated and corrosion test results showed that corrosion behaviours of untreated and nitriding samples had similar characteristic.
Abstract: In this study, plasma nitriding treatment was applied to commercially pure titanium (Grade 2). Structural properties, electrochemical and tribological behaviours of the nitrided pure titanium specimens were comparatively investigated. Microstructure and morphology of the plasma nitrided specimens were analysed by X-ray diffraction and scanning electron microscopy. Furthermore, corrosion tests were conducted in Ringer's solution, which represents a human body environment, to determine electrochemical properties. Then, tribological and frictional properties were investigated using pin-on-disc tribometer, and a micro-hardness tester was used to measure the hardness of the coatings. The results showed that plasma nitrided specimens exhibited higher surface hardness than the untreated specimens did. In addition, the plasma nitrided specimens at 700 °C presented significantly better performance than the other plasma nitrided specimens (at 500 °C and 600 °C) under dry wear conditions. Moreover, corrosion test results showed that corrosion behaviours of untreated and nitrided samples had similar characteristic.
01 Jan 2021
TL;DR: In this article, the influence of peening on various biomaterials is elaborated and the enhancement of tribological and mechanical properties by virtue of the peening and corresponding mathematical relationships which correlate the changes are presented.
Abstract: Implant materials are those implanted in human body, which are required to replace the diseased organ without causing any toxicity to human environment and sustain for longer period of time. As the implant materials are subjected to various stresses and cells in the human also requires an appropriate stresses to differentiate, the mechanical properties of an implant under different loading conditions, play an important role in determining the performance of the implanted material. Various properties such as wear resistance, tensile strength, fracture toughness, and modulus of elasticity would determine the applicability of a particular implant material for replacement in case of hip and knee joint replacement and fractured bone joints. The implants, plates, and screws are made of materials such as 316 stainless steel cobalt–chromium alloy and titanium alloys. As surface of an implant are subjected to wear, corrosion, and bone integration, the failure of the implants are initiated on the surface and hence a number of surface modification processes and thermo-mechanical/chemical treatments are carried out on these materials to achieve the desired properties. Various surface modification techniques such as plasma spraying, physical vapor deposition, and chemical vapor deposition are carried out coat wear and corrosion resistance ceramics. Few surface modifications such as sand blasting, etching, surface mechanical attrition treatment (SMAT), and peening are used to modify the surface without the addition of coatings. In this chapter the influence of peening on various biomaterials is elaborated. The enhancement of tribological and mechanical properties by virtue of peening and the corresponding mathematical relationships which correlate the changes are presented. The outcome of this chapter is intended to accelerate research in this isolated and upcoming area of peening which is generally performed on various aerospace and automotive materials for improving their fatigue/endurance limits in real time applications.
TL;DR: The most important subclasses of diamond-like carbon (DLC) coatings are hydrogenated amorphous carbon (a-C:H) and hydrogen free tetrahedral amorphus carbon (ta-C) as discussed by the authors, which can be used in different industrial applications such as magnetic storage media, diesel injection pumps, sliding bearings, car valve rockers, gears, tappets of racing motorcycles, VCR head drums, textile industry parts, motor cycle forks, razor blades, etc.
TL;DR: TiN-coated titanium alloy femoral heads are inadequate in the task of resisting third body wear mechanisms in vivo according to the results of the study performed on four titanium nitride (TiN) coated prosthetic femoral Heads collected at revision surgery together with patient data.
TL;DR: In this article, the authors compared calculated values from three different equations with stylus-tip profilometry determination of wear volume, based on the results of a comprehensive study of fretting wear of steel and ceramics.
TL;DR: In this paper, the friction properties of DLC films are investigated for sliding against both hard and soft mating materials. And the wear rates of the DLC films were strongly related to the mating material hardness: the harder the slider, the higher the wear rate.
TL;DR: In this paper, a test rig is designed and developed in the laboratory for understanding the fretting wear behavior of bearing materials, which is designed for testing at slip amplitudes ranging from 20 to 200 μm and test frequencies ranging from 1 to 30 Hz.