| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
|
| Presentation Title |
The Use of Extraction Replication to Study Nano Precipitates in Powder Feedstocks and the Corresponding Additively Manufactured Builds |
| Author(s) |
Qiushi Jin, Manuel Sanchez-Poncela, Rainer Hebert, Mark Aindow |
| On-Site Speaker (Planned) |
Qiushi Jin |
| Abstract Scope |
The microstructural evolution in metal additive manufacturing (AM) often deviates significantly from that in conventionally processed alloys. Notably, many AM builds exhibit fine inclusions or precipitates, which profoundly affect the microstructure and mechanical properties. It is essential to distinguish the minority phases that originate from the powder feedstock from those that form during the AM process. Conventional transmission electron microscopy (TEM) studies of these minority phases are challenging due to interference from the surrounding metallic matrix. In this study, we demonstrate the power of using extraction replication on electropolished cross-sections of feedstock powder and of the corresponding additively manufactured builds to reveal the origins and development of minority phases. To illustrate this approach, we consider data obtained from a Ti-modified high-manganese triplex steel in which the suppression of hot cracking is accompanied by the formation of Ti-rich nano precipitates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Nanotechnology |