| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Multi Scale Modeling of Microstructure Deformation in Material Processing
|
| Presentation Title |
Microstructural Evolution from Hot Torsion Tests for Material Modeling and Parameterization |
| Author(s) |
Andrew Barrett Gilmore, Xun Liu |
| On-Site Speaker (Planned) |
Andrew Barrett Gilmore |
| Abstract Scope |
This study focuses on an integrated experimental and modeling analysis on deformation behavior of AA2219-T87 aluminum alloy at different strain rates and temperature, which are essential to help understand the physic principles in various manufacturing processes and provide accurate constitutive material models. Hot torsion tests were performed with Gleeble machine with starting texture of the specimens either on the rolling or the transverse direction. Microstructure of the tested specimen are examined to reveal recrystallization and deformed grains. These results are used in tandem with a finite element model (FEM) to determine relationships between local strain, strain rates, temperature and microstructure, along with threshold values to induce recrystallization. The Johnson-Cook Plasticity material model is calibrated by matching the predicted torque curve to the experimental data. The ability to use hot torsion tests with calibrated FEM model to perform material characterization allows for wide ranges of microstructural results from singular tests. |