Numerical Simulation Of The Process Of TA15 By The Point Continuously Forging And Laser Rapid Forming

Laser rapid forming technology based on rapid prototyping technology which has combined with the laser cladding is a forming technology, but the antifatigue performance of TA15 titanium alloy processed by laser rapid forming is still lower than titanium alloy by forging, and it is difficult to implement its application in aircraft structures. This article combined the point continuously forging with laser rapid forming technology, which brings the non-equilibrium microstructure by laser rapid forming about plastic deformation. Through the recrystallization, the nonquilibrium microstructure by laser rapid forming transformed to the microstructure by forging. Therefore, it is important for the analysis of microstructure and the optimization of parameters, through the research on the distribution characteristics of temperature field and stress field, which is in the process of Laser rapid forming and the point continuously forging.Through finite element simulation of temperature field and stress field, it is concluded that how the relationship between the Laser power and the radius or the depth of molten pool is, and under different parameters, how the temperature field changes. At the same time, with the study on the cladding layer and the substrate, it points out that the influence of thermal stress with the different laser power, scanning speed and spot diameter.Based on the thin wall panel by the laser rapid forming, this article researches on the size of the depth of the laser remelting and the forging plastic deformation zone through simulation of the cladding layer metal. Through the analysis of equivalent strain and equivalent stress, it divided into tiny deformation area, large area, larger deformation area according to the different deformation degree of plastic deformation area.Using optical microscope and scanning electron microscope to observe the α equal axis degree in the deformation zone, and compared with TA15 titanium alloy microstructure by laser deposition, to explore the distribution characteristics of microhardness and tensile mechanical properties in the deformation zone. Therefore, by changing the size of the deformation, the relationships between microhardness and tensile mechanical properties with deformation are established. At the end, it proves the validity of the simulation.