About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
In Tribute to Robert Wagoner: A Pioneer in Metal Forming and Constitutive Modeling
|
| Presentation Title |
CPFEM Analysis of Deformation Mode Interactions Influencing Anisotropy and Yield Point Phenomenon in Commercially Pure Titanium Sheets |
| Author(s) |
Ji Hoon Kim, Kyeong Pyo Kim, Joo-Hee Kang, Chang-Seok Oh |
| On-Site Speaker (Planned) |
Ji Hoon Kim |
| Abstract Scope |
This study investigates the anisotropic deformation behavior and yield point phenomenon in commercially pure titanium Grade 4 sheets through experimental characterization and dislocation-density-based crystal plasticity finite element modeling. Tensile and compressive tests in different directions were performed to measure anisotropy and tension–compression asymmetry of the material In-situ EBSD and slip trace analyses were conducted to identify the dominant deformation modes. The CPFEM model was then calibrated based on the measured macroscopic stress-strain behavior and r-values. A strong TD-split basal texture with ~70° c-axis tilting was shown to influence the anisotropy and hardening behavior. CPFEM and micro-tensile tests confirmed that early tensile twinning, followed by prismatic slip within twins, triggers the transient softening and re-hardening characteristic in yield point phenomenon. These results identify the microstructural origins of anisotropy and yield point phenomenon in α-titanium. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Mechanical Properties, Computational Materials Science & Engineering |