| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced High Strength Steels IV
|
| Presentation Title |
The Relevance of Interfacial Segregation for Controlling Second Phase Precipitation in Advanced High Strength Steels |
| Author(s) |
Alisson K. Da Silva, Ponge Dirk, Baptiste Gault, Dierk Raabe |
| On-Site Speaker (Planned) |
Alisson K. Da Silva |
| Abstract Scope |
Interfacial segregation plays a critical role for a wide range of materials properties and phase transitions. Segregation provides a non-classical, i.e. chemistry-driven pathway for the heterogeneous nucleation of a second phase (e.g., austenite). Through the change of the local compositional working point via defect segregation, specific spinodal decomposition and chemical precursor states become possible at interfaces that do not occur in the adjacent bulk. Hence, heterogeneous nucleation can proceed both, through providing interfacial energy and by enabling formation of compositional precursors that bring the defect region closer to the composition of stable phases. The relevance of interfacial segregation for alloy design will be exemplified here by a new class of precipitation hardened martensitic Fe-Mn-Ti alloys developed by controlling second phase precipitation via solute segregation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |