Wear rate of a TiAl matrix composite containing 10 wt% Ag predicted using the Newton interpolation method

Abstract

The longevity of a mechanical component was evaluated by predicting the wear rate of the material. The primary purpose of this study was to construct three prediction formulas (W₄(F), W₄(n) and W₄(t)) to predict the wear rate at different applied loads F, rotation speeds n and sliding times t based on a TiAl matrix composite containing 10 wt% Ag. Prediction formulas of wear rate, which were constructed by the Newton interpolation method, were evaluated by making a comparison between the testing error and computational error. The results showed that the prediction formulas (W₄(F), W₄(n) and W₄(t)) of wear rate were accepted for smaller computational errors. It was found that the prediction accuracy gradually increased for the higher binding force of wear debris at larger applied loads F (see formula W₄(F)), and slightly decreased for random impacting of wear debris at higher rotation speeds n (see formula W₄(n)), as well as being relatively stabilized for incessant forming of anti-friction films at different sliding times t (see formula W₄(t)).