About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
8th World Congress on Integrated Computational Materials Engineering (ICME 2025)
|
Presentation Title |
Comparative Study of Melt Pool Dynamics and Keyhole Formation in Laser Powder Bed Fusion Process (LPBF) of SS316L and Ti-6Al-4V |
Author(s) |
Amrita Dixit, Amarendra K. Singh |
On-Site Speaker (Planned) |
Amrita Dixit |
Abstract Scope |
Understanding melt pool dynamics during laser-material interaction is critical to achieving high-quality mechanical properties in components produced through laser powder bed fusion (LPBF). This study examines the effects of constant versus variable absorptivity on keyhole formation predictions for Ti-6Al-4V alloy via numerical simulation. A mesoscale model is developed to incorporate key physical phenomena such as Marangoni convection, recoil pressure, convective losses, and vaporization losses, while a ray tracing method with Fresnel absorptivity simulates variable absorptivity. The constant absorptivity model is validated against existing data for SS316L alloy, whereas the variable absorptivity model is validated for Ti-6Al-4V alloy. Using the validated model, experimental data for SS316L alloy are further validated to identify processing parameters for keyhole formation. This will help in the optimization of the processing parameter for the control of melt pool dynamics. These insights enhance the understanding of melt pool dynamics in both conduction and keyhole melting modes. |
Proceedings Inclusion? |
Undecided |