The formation and elimination of defects of alloying surface irradiated by high current pulsed electron beam

摘要

The various metal films was deposited on the SAE9310 steel surface by DC magnetron sputtering, then the high current pulsed electron beam (HCPEB) irradiating was used to re-melting and mixing the alloy elements of surface to obtain a surface alloying layer.Several types of surface defects were found after irradiation, such as surface aggregation, eruption, micro-cracks and delamination.The generation mechanism and evolution with irradiation number of these defects were investigated based on the results from finite analysis and SEM.The results showed that selecting a proper energy density and increasing the irradiation number can eliminate the surface defects.