Tribological studies of different bioimplant materials for orthopedic application using Taguchi experimental design

Sachin Solanke,Vivek Gaval

doi:10.30678/fjt.103070

Sachin Solanke, Vivek Gaval

Open Access

https://doi.org/10.30678/fjt.103070

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Abstract

In this research ball on disc wear tests have been carried out with ASTM G-99 standard at room temperature in simulated body fluid. The tribological property such as the coefficient of friction and wear weight loss was studied by using the Taguchi design of experiments. The design of the experiment was done using L8 orthogonal array to determine the collective contribution of the wear parameters. An analysis of variance demonstrated that the individual contribution of type of material factor was 97.15% and 66.66% for the coefficient of friction and wear weight loss respectively, which is the highest individual contribution as compared to other factors. It was concluded that the coefficient of friction and wear weight loss is mainly influenced by type of material factor. The analysis of the signal-to-noise ratio shows that the optimal coefficient of friction and wear weight loss was obtained with CoCrMo material at an applied normal load of 5 N with a sliding velocity of 0.05 m/s for a track diameter of 30 mm. To check the accuracy of results a confirmation test was carried out which indicates that predicted values are very close to the experimental values and the model is significant to predict the coefficient of friction. The results showed that the coefficient of friction and wear weight loss increases with increasing the applied load and sliding velocity. The microstructure of all substrates materials was analyzed using a scanning electron microscope. Wear track study showed that adhesive dominant wear mechanism for all four different substrate materials.

Highlights

For improvement of research in the field of biomaterials engineering, it is necessary to study the tribological behavior of the material to improve the existing used biomaterials otherwise for the development of new virgin materials with exceptional properties [1]
Pin on disc wear test revealed that CoCrMo material exhibits lower COF compared to other materials such as SS316L, TIGR2, and TIGR5
ANOVA analysis provided the exact amount of percentage (%) contribution of each factor on COF and weight loss

Summary

Introduction

For improvement of research in the field of biomaterials engineering, it is necessary to study the tribological behavior of the material to improve the existing used biomaterials otherwise for the development of new virgin materials with exceptional properties [1]. For safe and effective use of orthopedic implants that are left in vivo for a long period, it is necessary to study the tribology, mechanical and biological properties of orthopedic bio implant substrate materials. Several factors contribute to the long-term survivorship in vivo of a biomedical implant. Out of this wear can be a major influencing factor for the proper performance of orthopedic bioimplant materials in an actual condition [3]

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