About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Laser Powder Bed Fusion of Nitinol: Experimental, Analytical and Finite Element Process Investigations |
Author(s) |
Sampreet Rangaswamy, Declan Bourke, Merve Nur Dogu, Medad C.C. Monu, Inam Ul Ahad, Dermot Brabazon |
On-Site Speaker (Planned) |
Sampreet Rangaswamy |
Abstract Scope |
This study examines the predictive capability of laser power and scanning speed on the width and depth of nitinol (NiTi) single tracks using finite element method (FEM) simulation of the laser powder bed fusion (L-PBF) additive manufacturing process, comparing predictions with analytical models. From the experiments, laser power showed a linear correlation with track width, while scanning speed had a logarithmic relationship. Melt pool depth lacked a consistent pattern. A proposed thermal model accurately predicted melt pool dimensions, with adjustments to NiTi's thermal-physical properties enhancing accuracy. The analytical Eagar-Tsai and Gladush-Smurov models provided the best predictions for width and depth, respectively. Experimental methodologies, including laser flash analysis (LFA), differential scanning calorimetry (DSC), and dilatometry (DIL), were employed to acquire temperature-dependent thermophysical properties of NiTi for Ansys simulations, verified against CALPHAD results from Thermo-Calc software. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Modeling and Simulation |