About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Advanced Materials for Harsh Environments
|
| Presentation Title |
Through-Thickness Texture Evolution in BCC Niobium During Cold Rolling: A Two-Scale ABAQUS/Explicit–DAMASK Study |
| Author(s) |
Mehady Hassan, Philip Eisenlohr |
| On-Site Speaker (Planned) |
Mehady Hassan |
| Abstract Scope |
Cold-rolled niobium (Nb) sheet is an important material for manufacturing superconducting radio frequency (SRF) accelerator cavities operating around 4 Kelvin. Through-thickness heterogeneity of crystalline texture of such sheets identified by EBSD and XRD characterization affects deep drawability, recrystallization behavior, and the final mechanical response of the formed cavity, but computationally predicting this process-induced heterogeneity remains difficult.
As an enabling step, we develop a two-scale framework that simulates the macroscopic sheet rolling using ABAQUS/Explicit and a simple isotropic material model, extracts time-resolved deformation gradient histories along various sheet depths, and individually applies these histories as boundary conditions on a highly-resolved polycrystalline representative volume element simulated with the open-source toolkit DAMASK. Adjustable parameters of both the macroscale isotropic and microscale phenomenological constitutive model are optimized by fitting to experimental stress–strain and texture evolution data.
This ABAQUS/Explicit+DAMASK framework captures position-specific texture prediction and supports optimization of cold-rolling schedules for SRF-grade Nb sheet. |