About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Modeling the Effects of Free Surfaces on Twinning Behavior |
Author(s) |
Brandon Leu, M Arul Kumar, Irene Beyerlein |
On-Site Speaker (Planned) |
Brandon Leu |
Abstract Scope |
Mg and Ti have gained increased popularity among structural metals due to their high specific strength and low density. A major interest in these metals is twinning deformation since the formation and propagation of twins play a critical role in determining their strength, ductility and stability. Many experimental observations of twinning deformation are conducted using electron microscopy techniques. However, the sample preparation processes necessarily introduces free surfaces to the sample that are not in the bulk. The free surfaces can influence the defect distribution and internal stresses that are experimentally measured, making it difficult to directly use the observations to predict material behavior outside of laboratory conditions. In this study, we use elasto-viscoplastic fast-fourier-transform (EVP-FFT) crystal plasticity modeling to explore the differences between micromechanical fields found in the bulk and near free-surfaces to determine when free surface effects are important and how they affect our understanding of twins. |
Proceedings Inclusion? |
Planned: |