Wear Rate and Entropy Generation Sources in a Ti6Al4V–WC/10Co Sliding Pair

Abstract

The potential of applying thermodynamics to study the tribological response of a tribological system is addressed in this paper. In order to do so, a model was developed to obtain the entropy flow generated by three different dissipative processes present in dry sliding, namely, thermal gradient, heat conduction, and abrasion. The flash and bulk temperatures at the contact interface were obtained with the aid of the finite element method (FEM), and pin-on-disk tests were performed by using titanium alloy (Ti6Al4V) disks and tungsten carbide (WC/10Co) pins. Then, the wear rate obtained from the tribological tests was correlated with the calculated entropy flow, and a degradation coefficient was associated to the sliding process. A linear dependence of the wear rate and the degradation coefficient was observed regardless of the variation of the points of operation of the system, so it is proposed that the coefficient of degradation used is inherent to the tribological system.

Study on Changes in Hardness and Wear Resistance of 3D Printed Ti6Al4V with Heat Treatment Temperature

“…Abrasive lines found on the wear tracks of all the printed/heat treated specimens are attributed to abrasive wear that results from the repeated sliding of the 100Cr6 steel balls [6,12,18,19] , c and d) have an additional O peak, which is not detectable on the untested area (Fig. 6a), as a result of a dry-slidinginduced oxidation process [12,14,[20][21][22]. In Figs.…”

“…5f.The EDX spectra of the printed Ti6Al4V specimens shown in Figs.6a-dare mainly composed of Ti, Al, and V peaks[6,10,12]. The EDX spectra detected on the wear tracks (Figs.6b, c and d) have an additional O peak, which is not detectable on the untested area (Fig.6a), as a result of a dry-slidinginduced oxidation process[12,14,[20][21][22].…”

Computer Simulation/Prediction of Wear in Mechanical Components

“…e degradation coefficient has been used successfully by various researchers to characterize various wear conditions. ese include steady state wear degradation [150][151][152], boundary and mixed lubrication systems [131], transient wear [153], and multiple wear mechanisms [154].…”

Effects of Shot Peening Pressure on Friction and Wear of High Pressure Cold Sprayed Ti-6Al-4V Coatings Under Dry and Lubrication Conditions

“…In aerospace industry, Ti-6Al-4V (Ti64), which has good machinability, good mechanical properties and light weight, is tirelessly used to make aircraft components [1][2][3]. Low abrasive wear resistance of Ti64, however, can lead to physical damages of Ti64 based aircraft components in their long-service so such damaged expensive components are necessarily repaired using traditional high-temperaturerepair-technologies such as thermal-spraying and welding [3][4][5].…”