| Abstract Scope |
Metal additive manufacturing is using various heat sources to sinter/melt the fine powder track by track and layer-by-layer for fabrication part. The inherent heat and mass transfer are nonlinearly coupled by the material properties, structure geometry and processing parameters. To reveal the nonlinear coupling effect, a full-scale analysis of thermophysical response is very important and necessary. To overcome the simulation limitation, an analytical block technique was developed for the full-scale simulation and realistically emulate the temperature field change. The main processing parameters: speed, energy, layer thickness, hatch distance, deposit pattern etc. and part geometry were considered. From the simulation, it is seen that the temperature field nonlinearly changes subjected to the change of material properties, part geometry and size, and processing parameters. The relationship among the temperature, temperature gradient, cooling rate, key processing parameters and geometry and size were built up for the designer to better understand the nonlinear effects. |