Akademik Veri Yönetim Sistemi
Intermetallics, cilt.189, 2026 (SCI-Expanded, Scopus)
This study investigates the surface enhancement of Monel K-500 alloy through the boroaluminizing process. Boroaluminized layers were produced by sequential powder-pack boriding (850–950 °C, 6 h) followed by aluminizing at 750 °C for 6 h. Optical and scanning electron microscopy examinations demonstrated that the boroaluminized layers were compact, with a thickness of approximately 129–133 μm. Energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analyses were employed to identify the elemental distribution and phase composition of the layers. The layers formed in the boroaluminized samples consisted of various nickel borides, nickel aluminides, and complex intermetallic phases. The microhardness of the layers was measured to range from 890 HV to 1060 HV. Ball-on-disk wear tests carried out under dry sliding conditions at ambient temperature revealed that the boroaluminized samples exhibited a 3.2–3.6-fold improvement in wear resistance compared to the untreated substrate. Furthermore, the friction coefficient was reduced by approximately 1.8 times. In accordance with the Daimler-Benz Rockwell-C indentation tests, acceptable adhesion strength was confirmed exclusively for the BA90 sample. These results highlight the potential of boroaluminizing as an effective method for significantly enhancing the mechanical and tribological performance of Monel K-500, making it suitable for demanding applications.