Akademik Veri Yönetim Sistemi
Journal of Alloys and Compounds, cilt.1036, 2025 (SCI-Expanded, Scopus)
This study focuses on the boronizing treatments of Monel K-500 superalloy under various process parameters, aiming to elucidate the effects of these treatments on the alloy's mechanical and tribological properties, in particular. The Monel K-500 alloy was subjected to boronizing at different temperatures (850–950°C) and durations (2–6 h) using a boronizing mixture containing boric acid through the powder-pack boronizing method. The boride layers formed on the substrate surface were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy-dispersive spectroscopy (EDS). Their mechanical and tribological properties were comprehensively evaluated through nanoindentation and wear tests. Wear tests were conducted on both non-boronized and boronized Monel K-500 alloys using a ball-on-disc method at room temperature under dry sliding conditions. Characterization studies revealed a boride layer with an acicular (needle-like) morphology, ranging in thickness from approximately 22 to 125 μm. This layer consisted of various borides, including nickel (Ni) borides, iron (Fe) boride, titanium (Ti) boride, and complex borides in the boronized samples. The elastic modulus and nanohardness of the boride layers were measured as 100.9–263.1 GPa and 934.54–1574.39 HV, respectively. The boronizing treatments were found to significantly enhance wear resistance. Increasing the boronizing temperature and duration generally resulted in higher wear resistance values. Specifically, the wear resistance of the sample boronized at 850°C for 2 h increased approximately tenfold, whereas the wear resistance of the sample boronized at 950°C for 6 h increased approximately twenty-fourfold.