| About this Abstract |
| Meeting |
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Symposium
|
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Presentation Title |
Formation of Crystal Defects in Rapid Solidification |
| Author(s) |
Tatu Pinomaa, Matti Lindroos, Paul Jreidini, Matias Haapalehto, Kais Ammar, Lei Wang, Samuel Forest, Nikolas Provatas, Anssi Laukkanen, Napat Vajragupta |
| On-Site Speaker (Planned) |
Napat Vajragupta |
| Abstract Scope |
Rapid solidification leads to unique microstructural features, where a less studied topic is the formation of various crystal defects, including point defects, high dislocation densities, as well as gradients and splitting of the crystalline orientation. As these defects critically affect the material’s mechanical properties and performance features, it is important to understand the defect formation mechanisms, and how they depend on the solidification conditions and alloying.To illuminate the formation mechanisms of the rapid solidification induced crystal defects, we conduct a multiscale modeling analysis consisting of bond-order potential based molecular dynamics (MD), phase field crystal based amplitude expansion (PFC-AE) simulations, and sequentially coupled phase field– crystal plasticity (PF–CP) simulations. The resulting dislocation densities are quantified and compared to past experiments. The atomistic approaches (MD,PFC) can be used to calibrate continuum level crystal plasticity models, and the framework adds mechanistic insights arising from the multiscale analysis. |
| Proceedings Inclusion? |
Undecided |