Salt Bath Nitriding of Fe3Al Based Intermetallic Compound

Celikyurek İ.

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, vol.70, no.5, pp.1209-1214, 2017 (SCI-Expanded) identifier identifier


Iron aluminide Fe3Al was produced in a vacuum arc melting furnace. The alloy was heat treated by salt bath nitriding at 580 degrees C for durations of 3, 6, and 9 h. The nitride layers formed on the surface were characterized with light optical microscopy (LOM), scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDXS), X-ray diffraction (XRD), and micro hardness measurements. The results showed that the nitride layer thickness increased with an increase in nitriding duration, while the layer hardness did not vary. The nitride layers were composed chiefly of iron nitride and aluminum nitride phases. The dry sliding friction and wear behaviors of nitrided iron aluminides were determined. The results revealed that the wear resistance decreased with increase in the length of nitriding.