Wear properties of nonhydrogenated,hydrogenated,and dehydrogenated Ti6A14V alloy

摘要

Wear properties of the nonhydrogenated,hydrogenated 0.5 wt% and dehydrogenated Ti6 A14 V alloys were studied through dry sliding wear tests using an M-200 type pin-on-disk wear testing machine in ambient air at room temperature to reveal the effects of hydrogen on wear properties of Ti6 A14 V alloy. Morphology and chemical element of worn surface were investigated by means of scanning electron microscope(SEM) and energy dispersive spectroscopy(EDS). Results show that hydrogen decreases the wear resistance of Ti6 A14 V alloy. Wear rate of the Ti6 A14 V alloy increases after hydrogenation. Wear rate increases by 244.3 % when 0.5 wt% hydrogen is introduced into a Ti6 A14 V alloy. Wear rate of the dehydrogenated Ti6 A14 V alloy recovers. Wear mechanisms of the nonhydrogenated, hydrogenated, and dehydrogenated Ti6 A14 V alloys are determined. The nonhydrogenated Ti6 A14 V alloy is controlled by oxidative wear. The hydrogenated Ti6 A14 V alloy is dominated by abrasive wear. Wear mechanism of the dehydrogenated Ti6 A14 V alloys is a mixture of oxidative wear and abrasive wear.