Tribological characteristics of hip joint endoprostheses

Шустер, Л. Ш.; Chertovskikh, S. V.; Минасов, Б. Ш.; Yakupov, R. R.; Emaev, I. I.

doi:10.3103/s1068366616010165

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…Ultrafine-grained metals, including UFG titanium alloys, have a significant advantage over coarse-grained ones produced by industry in terms of strength and fatigue resistance [23][24][25]. The authors of [26] reported that the formation of nano or UFG structures in titanium via SPD reduces the adhesive component of the friction coefficient and reduces its tendency to setting [27]. One can assume that the formation of UFG structures in Ti-6Al-4V alloys will result in a positive response to turning conditions.…”

Section: Introductionmentioning

confidence: 99%

Machinability Features of Ti-6Al-4V Alloy with Ultrafine-Grained Structure

Semenova,

Polyakov,

Gareev

et al. 2023

Metals

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Titanium alloys are widely used in various industries. The most common and well-known titanium alloy is titanium alloy with aluminum and vanadium (Ti-6Al-4V). This alloy is used, for example, in the manufacture of aircraft engines. As part of the development of technologies and the emergence of the evolving requirements for materials, Ti-6Al-4V alloys with ultrafine grains less than 1 μm may become promising. This modification of the alloy has excellent strength characteristics, such as increased fatigue resistance. However, manufacturers are aware of the machinability problem of titanium alloys. To date, a sufficiently high level of understanding of this problem has already been achieved. But, there is practically no information about the machinability of ultrafine-grained alloys and their comparison, in this regard, with the usual coarse-grained version. This study presents the results of experimental studies on the influence of cutting parameters (cutting speed, V, m/min; feed rate, Fz, mm/rev) on the roughness and microstructure of the surface of Ti-6Al-4V samples with coarse-grained and ultrafine-grained structures produced via equal-channel angular pressing. It is shown that turning at a low cutting speed (V = 48 m/min) results in a better surface roughness, Ra, for the coarse-grained sample compared to its ultrafine-grained alloy counterpart. When the cutting speed is increased by 1.5 times (up to V = 72 m/min), on the contrary, the ultrafine-grained sample has a lower surface roughness, Ra, compared to the coarse-grained sample. The differences in the morphology and microstructure of the chips, depending on the microstructure type of the processed alloy, are discussed: the presence of plastic flow lines in the chip microstructure of the turned ultrafine-grained sample and the formation of shear bands, cleavages, and microcracks in the chips of the turned coarse-grained alloy.

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Section: Introductionmentioning

confidence: 99%

Machinability Features of Ti-6Al-4V Alloy with Ultrafine-Grained Structure

Semenova,

Polyakov,

Gareev

et al. 2023

Metals

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“…In addition, inadequate dimensions and materials choice may make unpleasant changes for patients in terms of the hip joint squeaking [8]. This points to the fact that the causes of failures can be related to the shape and dimensions of the artificial hip, choice of the type [9], and material structure [10] as well as tribological processes [11,12].…”

Section: Introductionmentioning

confidence: 99%

Design of Custom Made Prosthesis of the Hip

et al. 2019

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Replacement of a natural hip joint with an artificial is one of the most commonly used surgical procedures in orthopaedic surgery. This paper describes the methodology of the hip joint prosthesis design, which presents the foundation for the automation of all stages of the development of custom-made prostheses. A general mathematical model based mostly on B-spline surfaces is used in order to define the prosthesis geometry. In order to verify the method, a software solution was developed and used for designing prostheses based on ten diagnostic images obtained by various methods. The results of the analysis of the ten designed prostheses, out of which five manufactured, show that deviations from the desired values are less than the errors caused by diagnostic imaging.

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