|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Refractory Metallic Materials
||Thermal-chemical-fluid Flow of Dissimilar Species Mixing between Titanium and Refractory Metals
||Junji Shinjo, Chinnapat Panwisawas
|On-Site Speaker (Planned)
Refractory metals are used for aerospace, nuclear and biomedical applications due to the temperature-resistant and bio-compatible nature. However, chemical species mixing is one of the issues in additive manufacturing (AM) of refractory metals. In this study, mixing characteristics are investigated for Ti and refractory metals (Zr, Nb, Mo, Hf, Ta, W) using direct energy deposition in which several processing parameters are investigated. It is revealed that the convective effect in the melt pool has a significant impact on mixing, where the local viscosity is important in determining the flowability. Higher-temperature molten metal has a smaller viscosity and thus mixing is better. The local temperature control is complicated due to the interaction between convection, vapourisation and heat transfer with temperature-dependent thermophysical properties. Here, several simulation cases are presented to indicate that digital materials design based on high-fidelity thermal-chemical-fluid flow simulation is a powerful tool in predicting the dynamic behavior in AM.
||Additive Manufacturing, Computational Materials Science & Engineering, Modeling and Simulation