About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Fully Coupled Thermomechanical Crystal Plasticity Framework for Analyzing Micromechanical Fields in Additive Manufacturing |
Author(s) |
Anderson Nascimento, James Lamb, Kaitlyn Mullin, Evan Raeker, Tresa M. Pollock, Irene J. Beyerlein |
On-Site Speaker (Planned) |
Anderson Nascimento |
Abstract Scope |
Constitutive thermomechanical crystal plasticity modeling enables precise descriptions of temperature-sensitive processes. This modeling is valuable for investigating thermomechanical deformation introduced during additive manufacturing (AM), where layerwise melting and subsequent heating contributes to residual stress accumulation throughout the print. Thermomechanical coupling, however, is often only partially addressed, neglecting the full integration of thermal dependence in the kinematic description, constitutive modeling, and governing equations. We bring forward a fully coupled, finite strain, thermomechanical crystal plasticity framework. This model is applied to study residual stress development, geometrically necessary dislocation (GND) density, kernel average misorientation (KAM) and lattice rotation solely due to solid state thermal cycling in additive manufacturing. High-resolution crystal plasticity simulations provide accurate spatial descriptions of these micromechanical fields under thermal-stress boundary conditions, and in-depth comparisons are made with additively manufactured Cobalt-Nickel superalloy data obtained from 3D EBSD. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, |