Prediction and assessment of working conditions of TiAl matrix composite containing MoO₃ tabular crystals based on Newton interpolation

Abstract

Purpose

This paper aims to predict and evaluate the wear rate of TiAl-2 Wt.% MoO₃ tabular crystals (TMCs) using the Newton interpolation methods.

Design/methodology/approach

The friction and wear behaviors of TMC were examined using pin-on-disc apparatus at different times, namely, 1,200, 2,400, 3,600, 4,800 and 6,000 s. The wear rates of five different times as interpolation nodes were measured and calculated by electron probe microanalysis (EMPA) and field emission electron microscope (FESEM). Then, the prediction formula of wear rate was constructed using the Newton interpolation method. The accuracy of the prediction formula and the relationship with friction layer and worn surface are verified for evaluating the reliability of the prediction formula.

Findings

The prediction formula shows a similar variation trend of TMC as the experimental results, indicating that the prediction formula can forecast the wear rate and working condition of TMC. Moreover, the microstructures of friction layer and worn surface also have a strong impact on the prediction formulas.

Originality/value

The prediction formulas of the Newton interpolation polynomial can be adopted to predict working longevity in the mechanical components, which can guide the practical engineering application in industrial fields.

Citation

Lu, G., Shi, X., Zhang, A., Huang, Y. and Liu, X. (2018), "Prediction and assessment of working conditions of TiAl matrix composite containing MoO₃ tabular crystals based on Newton interpolation", Industrial Lubrication and Tribology, Vol. 70 No. 7, pp. 1217-1223. https://doi.org/10.1108/ILT-10-2017-0316