74. MODELING THE EFFECT OF THE CONTACT TEMPERATURE ON THE DEFORMATION OF AN ALUMINUM PIN DURING A WEAR TEST

MARIO ROBERTO ROSENBERGER; FORLERER, E.; SCHVEZOV, C. E.

Seatle

Congreso; , 139º TMS Annual Meeting & Exhibition. TMS 2010; 2010

The temperature of the contact surface of aluminum pins increases under dry sliding, the temperature increases the plastic deformation of the subsurface, which moves and places superficial materials on the borders of the pin. A thermal model with asperities on the contact surface was developed to calculate the temperature field of the bulk, which is used in an elasto-plastic model to predict the pin deformation. A three-dimensional model was employed, and temperature dependent mechanical properties were assumed. Loads were applied simulating a test performed in a pin-on-ring machine. A sudden subsurface deformation was observed when the tangential load achieves a well determined value, defined as the critical load. This critical load increases when the temperature diminishes. The results of the model are compared with experiments performed on AA1060 alloys reinforced with 15 % alumina particles. Agreement between predictions and experiments was observed.