Investigation of Mechanical Properties and Wear Resistance of A2/B2 Type Medium-Entropy Alloy Matrix Reinforced with Tungsten Particles by In-Situ Reaction

Microstructure, mechanical properties, wear resistance, corrosion and corrosive resistance of AlCrFeNiWx (x = 0, 0.1, 0.2, 0.3 0.4) medium-entropy alloys (MEAs) prepared by vacuum arc melting process were investigated. Results the study show that microstructure as-cast is composed one disordered Fe-Cr rich BCC phase (A2) ordered NiAl-rich (B2) when x 0 0.1; W particles appear ≥ 0.2. Hardness strength AlCrFeNi alloy are markedly increased addition. The strengthening mechanisms include solid-solution strengthening, nano-sized precipitation second strengthening. excellent ductility retained with minor addition ≤ 0.2) but it considerably declines as more added, resulting from excessive large-sized particles. improves pitting passivation property HEA in 3.5 wt. % NaCl solution. It shown AlCrFeNiW0.3 possesses highest reflected Ecorr lowest Icorr. Tungsten notably enhances this to wear. AlCrFeNiW0.4 hardness exhibits volume loss under both dry conditions.