Synthesis and characterization of a novel CoCrFeMnNi high-entropy alloy-reinforced AA6082 composite

The influence of CoCrFeMnNi high-entropy alloy (HEA) particle addition on the microstructure and mechanical properties of the Al-6082 the composite was examined. Mechanical alloying was used to develop the CoCrFeMnNi HEA, while stir-squeeze casting assisted with an ultrasonic transducer was used to process the Al6082 alloy and CAl6082+ HEA(xwt%) composites (where, x = 2, 4, 6, 8). The microstructural and morphological investigation was carried out using XRD, EDS, FESEM, and elemental mapping techniques. At the as- cast condition, the hardness, yield strength, and ultimate tensile strength of the C-Al6082+HEA(8wt%) composite were increased by 28.57%, 79.46%, and 87.931%, respectively, over monolithic alloy, which was associated with a consistent distribution of HEA particles. Furthermore, it possessed the best tensile strength, yield strength, and fracture strain when compared with C-Al6082+HEA composites, indicating a better interaction among HEA particles and Al matrix, and a high dislocation density in the Al matrix.

Automated summary

By using mechanical alloying and stir-squeeze casting, CoCrFeMnNi high-entropy alloy and Al-6082 composite were successfully developed, showing that a consistent distribution of HEA particles can significantly enhance the mechanical properties of the composite under as-cast condition.