About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Evaluating Absorptivity from Surface Temperature Measurements of Tracks Produced by Direct Laser Metal Deposition |
Author(s) |
Andrii Maksymenko |
On-Site Speaker (Planned) |
Andrii Maksymenko |
Abstract Scope |
Direct Laser Deposition involves directing a flow of powder into a laser-melted pool on a substrate surface. Infrared (IR) thermal cameras often provide detailed in-situ information about the surface temperature. The bulk behavior of the material can be estimated through modeling, which is significantly improved if the precise value of the material's laser energy absorptivity is known. This investigation focuses on developing new in-situ techniques for numerically estimating material absorptivity from surface temperature measurements during laser scanning. One approach uses a direct solution of the heat equation with the surface temperature as a boundary condition, while another approach is based on the Rosenthal approximation for temperature distribution around a moving point surface heating source. The numerical approaches were verified by processing experimental data on surface temperature distribution during the direct laser deposition of a nickel alloy. The calculated absorptivity values closely match the literature results obtained by other methods. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Additive Manufacturing, Modeling and Simulation |