|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Phase Field Simulations of Direct Aging of a Rapidly Solidified Ni-Fe-Nb Alloy
||Bala Radhakrishnan, Sarma Gorti, Ranadip Acharya
|On-Site Speaker (Planned)
Standard heat treatments developed for wrought Ni-base alloys cannot be used for AM alloys. Extensive homogenization of as-built microstructures not only results in increased energy consumption but also the destruction of fine microstructural scale obtained through rapid solidification during AM. Direct aging of as-built microstructures could result in the formation of undesirable phases. The research focuses on designing a custom heat treatment to achieve the optimum microstructure in AM parts. This approach is demonstrated through large scale, phase field simulations of solid-state precipitation in a model Ni-Fe-Nb ternary. The simulations capture the effect of solute gradient and dislocation strain fields in the AM microstructure on precipitation. Research sponsored by the Advanced Manufacturing Office of the U.S. Department of Energy under the High-Performance Computing for Energy Innovation (HPC4EI) program and performed at the Oak Ridge National Laboratory managed by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 for the U.S. Department of Energy.
||Additive Manufacturing, Modeling and Simulation, Phase Transformations