About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
The role of twin boundaries in the persistence of abnormal grain growth in Ni |
| Author(s) |
Yi Wang, Zipeng Xu, Gregory Rohrer, Amanda Krause |
| On-Site Speaker (Planned) |
Yi Wang |
| Abstract Scope |
Abnormal grain growth (AGG) significantly changes the bulk properties of polycrystals. Despite its significance, the mechanisms driving AGG remain unclear, creating challenges in predicting and controlling microstructural evolution during processing. Previously, laboratory-based x-ray diffraction contrast tomography measurements were used to study the initiation of AGG. No correlations were found between initial grain size and curvature with the growth behavior. Additionally, none of the features were predictive of AGG. In this study, the same methodology was applied to observe multiple time steps following the formation of abnormal grains. Although a prevalence of Σ3 coherent twin boundaries was previously found in pure nickel exhibiting normal grain growth, a significant increase in the density of both Σ3 incoherent and coherent twin boundaries is observed after AGG. The incoherent twin boundaries tend to exhibit distinctive morphologies. The significance of Σ3 incoherent twin boundaries and their morphology on abnormal grain growth will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Copper / Nickel / Cobalt, Other |