Synthesis of ferritic ODS steel with different electric current in arc plasma sintering method

Abstract

Ferritic ODS (Oxide Dispersion Strengthened) steel has been synthesis by Arc Plasma Sintering method with different electric current from milled powder in Fe-14Cr-0.5Y2O3 wt% composition. Ferritic milled powder was carried out using high-energy milling with various BPR (Ball to Powder Ratio) and milling duration. The samples' crystallite size-strain, phase, and composition were analyzed by XRD (X-Ray Diffraction) with Rietveld methods. The microstructures and micro-hardness were investigated by Optical microscopy, SEM-EDS (Scanning Electron Microscopy-Energy Dispersion Scanning), and Vickers microhardness. The different electric currents of Arc plasma sintering affect the microstructure and mechanic properties of the samples. The results observed ferrite formation. Some void and aggregation were also observed in the samples. However, the microhardness increases by increasing the electric current. On the other hand, the main phase Fe-Cr was also observed in the samples, while the crystallite size-strain also changed by changing the electric current.