A study of the friction layer of TiAl-10wt.% Ag composite and the prediction model of friction and wear behaviors

摘要

It was significant to study the longevity of mechanical component by analyzing the effect of friction layer on the predicting models of wear rates and friction coefficients. In this study, based on the changes in applied load F and testing temperature T, the friction and wear behaviors of TiAl-10wt.% Ag were carried out sliding against Si3N4 ball (6mm in diameter). At 0-80min, the prediction models of friction coefficients and wear rates were constructed by the method of bivariate rational interpolation. The predicting accuracies of Pcomp-f: 94-98.7% (friction coefficient) and Pcomp-w: 87.7-98.5% (wear rate) indicated that the constructed prediction model was able to evaluate the friction coefficients and wear rates of TiAl-10wt.% Ag. The high predicting accuracies were mainly attributed to the excellent plastic fluidity of silver, the smooth morphology of wear scar, and the friction layer of low grain strain.