| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Integrated Experiment and Numerical Simulation Analysis of Densification and Cracking during Laser Powder Bed Fusion of Tungsten |
| Author(s) |
Shashank Sharma, K.V Mani Krishna, Sameehan S Joshi, Jitesh Kumar, M Radhakrishnan, Selvamurugan Palaniappan, Saikumar Dussa, Rajarshi Banerjee, Narendra B Dahotre |
| On-Site Speaker (Planned) |
K.V Mani Krishna |
| Abstract Scope |
The present study dwelt upon a multi-scale finite element method (FEM) process model to understand thermo-kinetic, thermo-fluidic, and thermo-mechanical phenomena during AM of pure tungsten. Attempts were made to understand the role of Marangoni convection, surface tension, melt viscosity, and recoil pressure on powder bed melting and its consolidation with the help of high-fidelity single-track melt pool models. In addition, the significance of multi-track multi-layer thermo-kinetic and thermo-mechanical effects were characterized by thermal gradient, cooling rate, thermal stress, and strain rate at the melt pool, and component length scales. Thus, the proposed modeling approach provided a physics-based premise to understand processing strategies such as layer scanning patterns and substrate pre-heating. Moreover, thermodynamic-based integration of Thermo-Calc with the process model helped in understanding possible cracking behavior in the case of alloying of pure tungsten. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Other |