Study on TheInfluence of Surface Friction Characteristics of Titanium Alloy on the Performance of Sensor

Abstract

In the study, the parameters of the fractal surfaceof titanium alloy are measured by the instrument STIL MicroMesure2, and a 3D thermal-structure binding model of micro-scale was blossomed between two fractal surfaces and applied to thermo-elastic contact with the generation of frictional heat. The temperature and the stress distribution are discussed using FEA. According to the numerical results, the conclusions can be drawn: At the initial stage of sliding, large interfacial shear strength means high maximum temperature. During the sliding process, interface shear strength is directly proportional to the maximum temperature decrement. In addition, the amount of contact area is directly proportional to the overall temperature of the contact regionnormal load, and sliding velocity influence. A tension stress zone exists at a certain depth(approximately5–10um) from the contact surface in the rear of contact asperity. This tension stress zone prevents the crack from extending along the depth direction while prompting the crack to extend parallel to the direction of friction surface crack growth, ultimately leading to fracture. This result provides a good illustration of the delamination wear theory, andhelp for the study of the effect on the performance of sensor.