|About this Abstract
|7th World Congress on Integrated Computational Materials Engineering (ICME 2023)
|Simulated Microstructural Evolution and Tool Chain Development for Process Optimization of Cast & Wrought Nickel-base Superalloy Billet Material
|Nicholas Krutz, Pavanachand Chigurupati, Corey J. O'Connell
|On-Site Speaker (Planned)
The microstructure evolution of Nickel-base Superalloy ingot material through final melt and initial ingot breakdown is simulated using a multi-step simulation workflow. The local solidification rates predicted during the final melt are treated as inputs to predict the local grain features within the ingot. The sensitivity of the as-cast flow stress to local segregation predictions is evaluated. The data obtained from the melt simulation is mapped onto the element centroids of a continuum Finite Element simulation to evaluate the microstructure evolution during initial stages of ingot breakdown. The breakdown forging sequence is coupled to a mean field recrystallization model capable of capturing dynamic and post-dynamic recrystallization which updates the flow stress of the material point within the given simulation time step. The effect of grain orientation as implemented is evaluated. The simulation results are compared to laboratory data. The relative sensitivities of the inputs are identified to a first-order approximation.