| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales V
|
| Presentation Title |
The Role of Plastic Anisotropy on the Reorientation Trajectories of BCC Polycrystals |
| Author(s) |
Matt Kasemer, Ezra Mengiste, Dominic Piedmont, Xuan Zhang, Mark C. Messner, Jun-Sang Park |
| On-Site Speaker (Planned) |
Matt Kasemer |
| Abstract Scope |
Irradiation is known to affect the macroscopic properties of materials, primarily observed as an increase in yield strength and a loss of ductility. It is of interest to understand the basic micromechanical behaviors which serve to influence these macroscopic phenomena. In this study, results from high energy X-ray diffraction experiments of irradiated Fe9Cr indicate that reorientation trajectories of grains exhibit paths which deviate more substantially from classical Taylor predictions than unirradiated samples. We hypothesize that this is primarily a function of plastic anisotropy. To that end, we quantify the effects that plastic anisotropy has on the reorientation trajectories of BCC polycrystals via a systematic study employing crystal plasticity finite element simulations. Results from simulations with increasingly severe plastic anisotropy are compared, and we observe trends regarding deviation from Taylor reorientation expectations. We will further discuss an observed increased propensity for grains to exhibit fragmentation. |