Hossein Raanaei

In this research, the thermal and magnetic behavior of high entropy Fe40Co20Ni20V10Cu10 alloy powders produced by mechanical alloying method were investigated. The thermal behavior of samples at 0, 2. 4, 8, 24, 48, 80, and 100h milling times was evaluated by differential scanning calorimetry (DSC). Based on the DSC results, the exothermic peaks are revealed for all the samples ascribing to the stress- relief of the samples. The samples at 8, 24, 48, and 80 h were analyzed by X-ray diffraction (XRD) scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM) to reveal structural and magnetic properties. The analysis of the heated samples showed the growth of the grain size and also appearing dominant FCC crystal phases . The SEM images indicated that the powderparticles are initially in the form of agglomerates which become more uniform and homogeneous as the milling time and heating temperature increases. The coercivity field of 8 h sample decreses with increasing heating temperature. The saturation magnetization and coercivity field of 80 h sample have the highest and lowest values, respectively, as compared to the other heated samples, exhibiting a softer ferromagnetic behavior.