An innovative and distinct class of materials that have piqued the interest of metallurgists owing to their distinct characteristics generated from four major core effects i.e., sluggish diffusion effect, high entropy effect, severe lattice distortion, and cocktail effect are termed as high entropy alloys. Mechanical alloying is one of the key techniques employed to produce high entropy alloy. In this investigation, the impact of the process controlling agent (PCA) and milling time on the microstructural evolution of CoCrFeMnNi HEAs (high entropy alloys) metallic powder particles in milling is studied. Mechanical alloying has a set of attributes, such as a ball-to-powder weight ratio, milling time, process controlling agent, ambient conditions, and grinding media. The phase evolution is investigated through X-ray diffraction (XRD), particle morphology identified via field emission scanning electron microscopy (FESEM), and elemental composition and distribution analyzed via energy dispersive X-ray (EDS), and elemental mapping, respectively. The significant effect is realized with varying process controlling agents and the optimum weight % of PCA is reported as 1.5.

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