Abstract:In this paper, pulsed magnetic field was applied to the aging process of TC4 titanium alloy. The effect of pulsed magnetic field on the mechanical properties and microstructure of TC4 was analyzed.By introducing atomic diffusion theory, the effect of pulsed magnetic field on precipitated phase in aging process was investigated.The results show that,After pulsed magnetic field treatment, the number of precipitates in the microstructure increases obviously, the size becomes smaller, and the distribution is more dispersed.The aging time of 0.5 h with pulsed magnetic field was compared with that of 4 h without magnetic field,The Vickers hardness increased by 35.7 HV5 and the compressive strength raise 30 MPa.Pulsed magnetic field can promote the precipitation of secondary phase, which greatly reduces the aging time.From the heory of diffusion, the pulsed magnetic field can increase the diffusion flux and promote the secondary phase precipitation by coupling the electron wind force and magnetization stress.