Numerical simulation for 3D printing of one metal material to another dissimilar one

Abstract

Presently there are very little studies being conducted on printing high waulity mult-metal(alloy) components. It is critical to study the phenomemons surrounding the meltpool and the dissimilar metal interface to better improve and refine the additive manufacturing process obtain the ideal finished product. Previous studies were done summarized in this dissertation were used as reference to compare the proposed SLM manufactoing and traditional methods. Other studies on the similar metals tried to solved the thermal incompatibility accompanying the material melting, cooling and solidification phase induces pores, cracks, brittle intermediate phase and other defects of parts fabricated. It will include improvements in each element and step involved in the printing process such as, the laser power laser speed, and the scanning strategies. The interface morphology of 3-D printed metallic part is an indicator of the part quality. To quantitatively evaluate the metal-metal interface quality, in this study, the results of simulation carried out on CFD-post software and actual experiments under the same working conditions are compared. Fluid motion on different cross-sections can be observed, this will highlight the underlying forces that is prevalent at the different positions of the melt pool , with 7 different working conditions it will ideally give a clear and concise view of 3D printing dissimilar metals. The analysis and evaluation of the metal-metal interface can be used to show the connection between micro structure and macro behaviors, which in turn provide a new insight into the 3D printing process and the desired outcome.