Study on the microstructure and performance of FeCoNiCrMn high-entropy alloy-based composites reinforced by nano-Al2O3 particles

The purpose of this study is to investigate the influence of different contents of nano-Al 2 O 3 particles (wt.% = 0–8) on the mechanical properties of FeCoNiCrMn high entropy alloys (HEAs), with the aim of enhancing their strength without compromising ductility. The samples were prepared using mechanical alloying and microwave sintering methods. The microstructure evolution and strengthening mechanisms were evaluated through X-ray diffractometer (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and transmission electron microscopy (TEM). The results demonstrate that nano-Al 2 O 3 maintains high stability within composites. An incoherent interface has formed between nano-Al 2 O 3…