Numerical simulation study of different scanning paths of Ti-6Al-4V by electron beam additive manufacturing

Abstract

Titanium and titanium alloys have good comprehensive mechanical and physicochemical properties such as low density, high specific strength, good low-temperature performance, and non-magnetic properties, which have been widely used in aerospace, biomedical and other fields. In that article, numerical simulation of single-layer multi-pass different scanning paths for Ti-6Al-4V process by electron beam additive manufacturing via ANSYS finite element simulation software, and the isometric bi-directional reciprocal scanning method was proposed; the temperature curves with the time of key position points under different scanning paths were obtained, and the temperature change curves under different printing methods, and the deformation of the substrate after the additive manufacturing process were derived. After comparing the temperature accumulation and thermal stress deformation at critical points of the printed layer under three printing paths, the effect of the print path on the temperature change pattern was analyzed. What indicated to us is that the isometric bi-directional reciprocal scanning results have a better printing effect compared with the conventional printing method.