FRICTION AND WEAR WITH A SINGLE-CRYSTAL ABRASIVE GRIT OF SILICON CARBIDE IN CONTACT WITH IRON-BASE BINARY ALLOYS IN OIL - EFFECTS OF ALLOYING ELEMENT AND ITS CONTENT.

Sliding friction experiments were conducted with various iron-base binary alloys (alloying elements were Ti, Cr, Mn, Ni, Rh, and W) in contact with a rider of 0. 025-millimeter-radius, single-crystal silicon carbide in mineral oil. Results indicate that atomic size and content of alloying element play a dominant role in controlling the abrasive-wear and -friction properties of iron-base binary alloys. The coefficient of friction and groove height (wear volume) generalloy decrease, and the contact pressure increases with an increase in solute content. There appears to be very good correlation of the solute to iron atomic radius ratio with the decreasing rate of coefficient of friction, the decreasing rate of groove height (wear volume), and the increasing rate of contact pressure with increasing solute content. Those rates increase as the solute to iron atomic radius ratio increases or decreases from unity.