EFFECT OF LOW AMPLITUDE IRRADIATED ULTRASONIC METHOD OF CHARACTERIZATION MICROALLOYING Fe-Cr-Y2O3

ODS Steel (Oxide Dispersion Strengthened) is an alloy with good corrosion and high temperature resistance. The utilization of ultrasonic irradiation method in toluene solution is a new method giving benefits like producing fine grain-size, forming micro-alloying on powder, and minimizing the oxide phase formation. This research investigates the influence of low amplitude on the reduction of the particle size and the formation of Fe-Cr microalloying on Fe-20Cr-1Y2O3 powder preparation. The powder was divided into 3 samples with ultrasonic irradiation and various amplitude of 20%, 30% and 40%. After that, each sample was characterized by SEM, EDS and XRD. This research shows that increasing the amplitude will decrease the particle size with the value of sample 20% > sample 30% > sample 40% is 4.60 μm>3.71 μm> 3.60 μm. The highest composition value of Fe-Cr is reached on the amplitude of 20% to the composition value of sample 20%: sample 30%: sample 40% is 81.9%: 81.2%: 64.7% without the oxide formation. The size of crystallite Fe Cr sample 20%: sample 30% : sample 40% size of 256.3 nm: 198.0 nm: 184.3 nm.