Surface modification of Ti6Al4V alloy by continuous electron beam

Abstract

Abstract In this work, Ti6Al4V alloy was surface modified by a scanning electron beam. During the modification procedure, the current of the electron beam was 25 mA, the frequency of scanning of the e-beam was 200 Hz, the accelerating voltage was 60 kV, the velocity movement of the sample was 5 mm/s and 10 mm/s. The samples were modified using a continuous electron beam, where the geometry of the beam deflection was in the form of a Lissajous curve. The phase composition of the obtained samples was investigated by X-ray diffraction. The microstructure was studied by optical microscopy. The microhardness was also investigated. The results showed that the treatment process causes the formation of a single-phase structure of α’ martensite, where the velocity of the specimen during the modification procedure does not affect the phase composition of the modified surfaces. The hardness values at the sample treated with 5 mm/s speed motion are lower than that treated at speed of sample movement of 10 mm/s.