Effect of hydrogen ion implantation on the microstructure of ODS ferritic steel

The effect of hydrogen ion implantation on the microstructure ofODS ferritic steel was studied by means of ion implantation at room temperature and in-situ observations in a low voltage electron microscope. The results indicated that a certain amount of (Fe,Cr)₂O₃ phases existed in the original ODS alloy. They did not change obviously after hydrogen ion implantation at room temperature. During heating the specimen implanted with hydrogen ions, however, the (Fe,Cr)₂O₃ phase dissolved gradually and the composition of the residual (Fe,Cr)₂O₃ phase changed too. On the contrary, the microstructure of the specimen which was not implanted with hydrogen ions did not changed obviously during heating, meanwhile, (Fe,Cr)₂O₃ phase did not dissolve.