About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
|
Symposium
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6th International Congress on 3D Materials Science (3DMS 2022)
|
Presentation Title |
Fingerprints of Abnormal Grain Growth in a Three-Dimensional Microstructure |
Author(s) |
Marcel Chlupsa, Eli Rotman, Jiwoong Kang, Ashwin Shahani |
On-Site Speaker (Planned) |
Marcel Chlupsa |
Abstract Scope |
Understanding abnormal grain growth (AGG) will enable control of polycrystalline microstructures and their properties. Unfortunately, this task is made difficult due to the rareness of AGG and the limitations on imaging sufficiently large regions via conventional characterization techniques. Here, we overcome this challenge by using 3D x-ray diffraction contrast tomography to visualize over 10,000 grains in a single specimen, a breakthrough in laboratory-based characterization. An Al sample was heated to 300 °C for 1 min. to promote recrystallization and grain growth. From the reconstructed data, we identified 45 abnormally large grains that comprised 10% of the total volume. We selected a set of descriptors to quantify their topological, crystallographic, and geometric attributes and performed a principal component analysis. The data reveal the combination of features that distinguish the abnormally large grains from the other grains in the microstructure, bringing us closer to predicting the occurrence of AGG in real materials. |
Proceedings Inclusion? |
Definite: Other |