| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales III
|
| Presentation Title |
Weldment Finite Element Modeling and Validation for Integration with CALPHAD Tools |
| Author(s) |
Daniel Bechetti, Jacob Steiner, Charles Fisher |
| On-Site Speaker (Planned) |
Daniel Bechetti |
| Abstract Scope |
Arc welding is an essential fabrication process that should be considered when computationally designing materials in order to increase the likelihood of successful adoption. Welding involves temporal and spatial variations in temperature ranging from above the melting temperature during initial deposition to repeated sub-solidus thermal excursions in the weld metal and base metal heat affected zones (HAZs) during subsequent weld passes. As such, an integrated approach that enables design for both desirable solidification behavior and microstructural stability during reheating should be considered for novel base and welding filler material combinations. This work discusses a methodology for finite element analysis (FEA) of multipass weldments via the SYSWELD software package, automated post-processing to extract location-dependent thermal history metrics, and input of those data into CALculation of PHAse Diagrams (CALPHAD)-based models for prediction of weld metal and HAZ microstructure. It presents a workflow aimed at combining continuum and thermodynamic models to enable compositional down selection and optimization. Application of the method to a novel austenitic steel alloy will be discussed. |