About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithm Development in Materials Science and Engineering
|
Presentation Title |
Real Time Boundary Condition Acquisition and Integration of Heats of Fusion and Phase Transformation Using an Implicit Finite Element Newton Raphson Based Approach for Thermal Behavior Prediction in Additively Manufactured Parts |
Author(s) |
Deepankar Pal, Madhu Keshavamurty, Grama Bhashyam |
On-Site Speaker (Planned) |
Deepankar Pal |
Abstract Scope |
The transient thermal behavior during additive processing as a function of space and is a key contributor towards an Integrated approach to Computational Additive Manufacturing suited for part qualification. Simulation outputs namely the thermal gradients and cooling rates are further used for microstructure and Crystal plasticity predictions. Additionally, the continuum residual stresses could be accurately predicted. Therefore, an accurate prediction of transient thermal response warrants for accurate downstream predictions.
To address the above-mentioned challenges and opportunities, a new approach was established where the top surface thermal boundary conditions were captured using an Infrared thermal camera and further emissivity corrected using static thermal simulation for application in transient thermal analysis during Additive Processing. In addition, heats of fusion and phase transformations were incorporated to arrive at an accurate simulation response. This response was validated against experimentally available melt pool metrics and further contrasted against Goldak and other heat source assumptions. |
Proceedings Inclusion? |
Planned: |
Keywords |
ICME, Additive Manufacturing, Phase Transformations |