Investigations on the mechanical properties and three-body wear behavior of pure Fe2B intermetallic with different chromium additions

Abstract

The effects of chromium on the mechanical properties and three-body abrasive wear behavior of pure Fe2B intermetallic are investigated in this work. The results show that, with chromium addition from 0 to 4.88 wt%, the fracture toughness of pure Fe2B sample initially increases to the highest value of 7.06 MPa m1/2, and then decreases. The fracture toughness was improved by approximately 161.4% with chromium addition of 4.07 wt%. Simultaneously, with the increment of chromium addition, the wear mass loss decreases and then increases in case of both SiC and SiO2 abrasives. Through systematical analysis of the wear surface and subsurface, it can be found that fracture toughness plays a dominant role in reducing the wear mass loss. Specific wear mechanisms are also explicitly discussed.