Search

Two-body abrasive wear behavior and mechanism of Fe B alloys with different Mo contents have been systematically investigated. The results show that the Mo addition can promote the formation of Mo-rich and Cr-rich M 2 B in Fe B alloys, and the Mo-rich and Cr-rich M 2 B possess the higher H (hardness) and δ A (plasticity factor) compared to the Fe-rich M 2 B. Meanwhile, with the increase of Mo content, the V Mo+Cr / V Fe increases slightly firstly and then increases rapidly (Where the V Mo , V Cr and V Fe represents the volume fractions of Mo-rich, Cr-rich and Fe-rich M 2 B, respectively, and the V Mo+Cr shows the volume fractions of V Mo and V Cr). The wear results reveal that the wear rate decreases greatly with the increasing V Mo+Cr / V Fe , especially when the V Mo+Cr / V Fe < 0.42. During the two-body wear process, the main wear mechanism is microcutting, and the Mo-rich and Cr-rich M 2 B provide better resistance to the SiC abrasive relative to the Fe-rich M 2 B. In this case, the increasing V Mo+Cr / V Fe induced by the Mo addition contributes to the improvement of the abrasion resistance of Fe B alloys effectively. • The Mo addition results in the formation of Mo-rich and Cr-rich M 2 B in Fe-B alloy. • The Mo-rich and Cr-rich M 2 B possess higher H and δ A compared to the Fe-rich M 2 B. • The Mo-rich and Cr-rich M 2 B can provide better resistance to the SiC abrasive compared to the Fe-rich M 2 B. • The increasing V Mo+Cr / V Fe induced by the Mo addition facilitates the improvement of the abrasion resistance of Fe-B alloy effectively. [ABSTRACT FROM AUTHOR]

In this paper, the effect of heat treatment (760–1060 °C) on tribological behavior of selective laser melted Ti6Al4V alloy against Si 3 N 4 counter-ball under different applied loads was investigated. Results show the wear rate of as-built Ti6Al4V alloy increased firstly and then gradually decreased with increasing the heat-treatment temperature, which obtained the lowest value when the heat treatment temperature was 1060 °C, exhibiting the best wear resistance. The higher applied load led to larger wear rate and lower coefficient of friction. The wear mechanism was strongly dependent on the microstructure transformation, micro-hardness and applied load, which was discussed in detail. • Ti–6Al–4V alloys were fabricated by selective laser melting. • Friction coefficient and wear resistance were optimized by heat treatment. • Higher applied load led to larger wear rate and lower friction coefficient. • Wear mechanism was strongly dependent on the microstructure transformation, micro-hardness and applied load. [ABSTRACT FROM AUTHOR]