| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling and Simulation: Microstructure, Mechanics, and Process
|
| Presentation Title |
Thermal History of LPBF Components Towards Predicting As-built Material Properties |
| Author(s) |
Martin Verhülsdonk, Simon Vervoort, Mustafa Megahed |
| On-Site Speaker (Planned) |
Mustafa Megahed |
| Abstract Scope |
LPBF as-built material properties, residual stress and component shape are dependent on the thermal history. Design and optimization of the deposited material thus far depends on experimental DOE’s – a systematic approach for industrial applications based on model informed optimization is missing. The numerical challenge is to predict the thermal history of a printed component using the machine build file. In this work, the conduction equation is reformulated to enable accelerated simulations. The laser position and operating conditions are read from the build file. The laser trajectory throughout the component is resolved providing required temperatures and gradients required for thermodynamic analysis. A demonstration build exhibiting both hot and cold regions is used to induce different metallurgical responses of the deposited IN718. Thermocouples are used to validate numerical predictions. Phase transformations are simulated and compared with component characterization confirming the accuracy of the overall process. |