Influence of Ultrasonic Burnishing on Dynamic Behaviors of the Al7075 Alloy Friction System Studied by Recurrence Analysis

Aiming to explore the influence of ultrasonic burnishing technology on the wear behaviors of Al7075 alloy friction pairs, the recurrence analysis method is employed to study the evolutions of recurrence plot (RP) and recurrence quantification analysis (RQA) parameters of friction coefficient signals. The results show that the RPs of burnishing Al7075 alloy specimens evolve from an abrupt structure to a homogeneous structure in the wear process. The average value of determinism [Formula: see text] and the average value of entropy [Formula: see text] of burnishing specimens as a whole are larger than those of nonburnishing specimens. For the burnishing specimens, the [Formula: see text] and [Formula: see text] are the highest under the load of 25[Formula: see text]N, with the values of 34.2008 and 4.3129, respectively. It demonstrates that the friction system of burnishing Al7075 alloy under the load of 25[Formula: see text]N has superior determinism and stability.