|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||A Thermo-elasto-viscoplastic Finite Element Model to Study Polycrystalline Evolution during Metal AM
||Nikhil Mohanan, Jérémy Bleyer, Thomas Helfer, Manas Upadhyay
|On-Site Speaker (Planned)
During Additive Manufacturing (AM) of metals, the material undergoes rapid solidification just after deposition. Then, until the end of the AM process, it is subjected to Solid-State Thermal Cycling (SSTC). It is important to study the role of SSTC on microstructure evolution during AM because microstructural features determining the material response such as texture, internal strains, etc., are affected by it. Recently, the group of Manas Upadhyay developed (i) a miniature laser metal deposition machine for synchrotron XRD experiments, and (ii) a laser-integrated SEM system, to characterize the SSTC-induced microstructural changes.
To complement these experimental techniques, we propose a Thermal Elasto-ViscoPlastic Finite Element (T-EVP-FE) polycrystalline model that can (i) simulate the local and macroscopic response of a material subjected to strong thermal gradients and (ii) act as a basis for future couplings/extensions to model recrystallization, grain growth, damage, fracture, etc. A preliminary comparison with aforementioned experiments is presented.
||Computational Materials Science & Engineering, Characterization, Modeling and Simulation