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Meeting 7th World Congress on Integrated Computational Materials Engineering (ICME 2023)
Symposium ICME 2023
Presentation Title Columnar to Equiaxed Transition During Solidification Under Additive Manufacturing Conditions
Author(s) Bala Radhakrishnan, Tahany El-Wardany, Ranadip Acharya
On-Site Speaker (Planned) Bala Radhakrishnan
Abstract Scope We present phase field (PF) simulations of the columnar to equiaxed transition (CET) occurring during solidification of Ti-Cu and Ni-Fe-Nb alloys under thermal conditions characteristic of powder fusion based additive manufacturing techniques. The PF simulations will involve direct coupling to alloy thermodynamics and a thermodynamically consistent nucleation model. The simulations are able to capture the transition from a solute-diffusion driven constitutional undercooling to thermal undercooling driven nucleation ahead of the epitaxial solidification front under AM conditions. A parametric study is presented under varying G and R conditions and alloy composition to capture the conditions under which the above transition occurs. This research was performed at the Oak Ridge National Laboratory under contract DE-AC05-00OR22725 with the United States Department of Energy (USDOE) and was supported by the High-Performance Computing for Manufacturing (HPC4Mfg) and the Exascale Computing Project (ECP) programs sponsored by the USDOE.
Proceedings Inclusion? Planned: Other

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