| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
A Thermo-Mechanical Finite Element Model to Predict Thermal Cycles and Residual Stresses in Directed Energy Deposition Technology |
| Author(s) |
Edison A. Bonifaz |
| On-Site Speaker (Planned) |
Edison A. Bonifaz |
| Abstract Scope |
A thermo-mechanical finite element model to design dense multi-material structures using the Directed Energy Deposition (DED) process is proposed. The numerical layer build-up procedure coupled with a moving heat flux was constructed to minimize strains and residual stresses in the multi-layer deposition of an AISI 316 austenitic steel on an AISI 304 austenitic steel substrate. To simulate the DED process, the automated interface of the ABAQUS AM module was used to define element activation and heat input event data as a function of time and position. Thermal cycles and thermally induced stresses created during the multi-layer deposition metal AM pool crystallization were predicted and validated. At constant power, it can be concluded that the lower the heat input, the lower the peak temperatures and residual stresses, meaning that from a design point of view, the one-way heat and material deposition processing toolpath with the higher welding speed should be selected. |