The Synthesising Process and Analysing of CoFeNiAlTiCr High Entropy Alloy by Mechanical Alloying

Abstract

The high entropy alloys are formed complex structure by synthesis of 4 or more elemental metals and consisted more than 5 atomic percent. The regular phases formed by the alloys occured high entropy. However, the unique properties of the complex structure make these types of alloys special materials. These type of materials show high strength values, especially at high temperatures. Some types of high entropy alloys have high fracture toughness at low temperatures. However, its features are not valid only with high temperatures and low temperatures. In this study, the synthesis of high entropy alloy that contains different elements with different mechanical properties according to Home-rothery rules by mechanical alloying method was performed which has elements different mechanical properties but according to hume-rothery rules. After blending high purity Co, Fe, Ni, Al, Ti, Cr alloys, 1h, 48h, and 96h milling were performed. The obtained mechanical alloy powders were then analyzed by SEM EDS and XRD analyzing methods.