Exploration of process parameters and post-processing of 3D printed SCF/PPS for low-altitude aircraft fabricationOA

3D printing of short-chopped carbon fiber reinforced high-performance lightweight industrial components has a wide range of applications in aerospace.3D printing,as a rapid prototyping technology,can effectively reduce the manufacturing cost and shorten the manufacturing time.This work focuses on the effects of post-treatment and process factors on the mechanical properties,porosity and crystallinity of 3D printed short-chopped carbon fiber reinforced polyphenylene sulfide(SCF/PPS).The analysis shows that the printing platform can homogenize the temperature field of the printed specimens,which reduces the residual stresses during the printing process.Appropriate nozzle temperature can improve the mechanical properties of the printed specimens.The printed samples exhibited the best mechanical properties with maximum tensile strength of 110 MPa,flexural strength of 93.6 MPa,and tensile modulus of 12.4 GPa at a nozzle temperature of 330°C and a platform temperature of 200°C.Subsequent post-processing studies showed that annealing alters the crystallinity of the PPS,which in turn affects its mechanical properties.On the other hand,porosity(which is negatively correlated with tensile strength)is mainly affected by thermal compression.