About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Experimental Characterization and FFT-based Modeling of Heterogeneous Deformation in HCP Materials |
Author(s) |
Behnam Ahmadikia, Leyun Wang, Irene Beyerlein |
On-Site Speaker (Planned) |
Behnam Ahmadikia |
Abstract Scope |
Active deformation mechanisms and their transmission across the grain boundaries are characterized in several HCP materials, using a combination of electron backscattered diffraction (EBSD) and scanning electron microscopy (SEM). Intense slip bands on prismatic planes and {101 ̅2} 〈1 ̅011〉 tensile twinning were the most common deformation modes observed in soft- and hard-oriented crystals in CP-Ti, respectively. In some adjacent crystals, transmission between the two mechanisms across the grain boundary was presumed. Applicability of the geometric factor m' to describe the transmission is discussed. Having the deformation characteristics identified by the characterization techniques, two full-field fast Fourier transform (FFT)-based calculations, twin-FFT and a novel SB-FFT, are then applied to explicitly model discrete twin and slip bands in crystals, respectively. Consequently, the effect of slip bands and twinning on the local stress fields and their role in slip ↔ twinning transmissions are presented and discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Modeling and Simulation, Titanium |