About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
G-6: Revealing Dissolution and Reprecipitation Behaviors of Inert Phases in LPBF Structures via Extraction Replication |
| Author(s) |
Qiushi Jin, Manuel Sanchez-Poncela, Rainer Hebert, Mark Aindow |
| On-Site Speaker (Planned) |
Qiushi Jin |
| Abstract Scope |
Inert phases (borides, oxides, nitrides, etc.) have a profound effect upon the microstructures and properties of additively manufactured alloys. The character, size, morphology, and distribution of these phases are significantly different from those in conventionally processed alloys, and detailed transmission electron microscopy (TEM) data are required to reveal the way in which they develop. Here we present a TEM study on the inert phases in a triplex steel processed by laser powder bed fusion (LPBF). Extraction replication was used to prepare TEM specimens of both the powder feedstock and the LPBF builds. The main inert phase in both the powder and the builds is Ti(N,C), but the scale and morphology of this phase indicate that there is dissolution and reprecipitation during LPBF processing. The presence of Al₂O₃ in the builds (but not powders) plays a significant role in the nucleation of the Ti(N,C), giving particles with characteristic core/shell structures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Titanium |