2018, Sajadi, M.

PROJECT TITLE: Synthesis and Characterization of Nanocrystalline CoFeMnNiAl High-Entropy Alloy

Post-Master Researcher 

This research aimed at synthesizing and characterization of nanocrystalline CoFeMnNiAl high-entropy alloy (HEA), using mechanical alloying (MA) and spark plasma sintering (SPS). Effects of mechanical alloying time on the morphology of powders, crystallite size and lattice strain of the synthesized powders were investigated, using X-ray diffraction (XRD) and scanning electron microscope (SEM). Synthesized powders were then consolidated by means of spark plasma sintering (SPS). Effects of sintering temperature on the mechanical properties of CoFeMnNiAl alloy were studied as well. Results show that single phase high entropy alloy, with FCC structure is formed after 30 h of milling. Further increase in milling time is associated with the appearance of BCC phase. As well, results show that SPS temperature has significant influence on the phase composition and mechanical properties of the synthesized alloy.