About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
AI/Data Informatics: Computational Model Development, Verification, Validation, and Uncertainty Quantification
|
Presentation Title |
Calibration of RAFM Steel Micro Mechanical Model for Creep Using Bayesian Optimization and Design of Experiments |
Author(s) |
Timothy Truster, Chaofan Huang, Roshan Joseph, Sunday Aduloju |
On-Site Speaker (Planned) |
Timothy Truster |
Abstract Scope |
A Bayesian optimization procedure is presented for calibrating a multi-mechanism micromechanical model for creep. Reduced activation ferritic martensitic (RAFM) steels based on Fe(8-9)%Cr are promising candidates for fusion reactor structures. Although there are indications that the RAFM steel could be viable for fusion applications, the maximum operating temperature will be determined by the creep properties of the structural material. Due to the paucity of available creep data on RAFM steel, micromechanical models are sought for simulating creep. As a point of departure, a model form that was proposed for Grade 91 steel will be recalibrated to match creep curves for RAFM steel. An automated approach for tuning the parameters is pursued using a recently developed Bayesian optimization procedure. Beginning from a space filling design of computational experiments, a reduction in error between experimental and simulated creep curves at two load levels is achieved in a reasonable number of iterations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Machine Learning |