About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-62: Structure Characterization of the Oxide Layer and Non-Metallic Inclusions In steel Powder with Various Particle Sizes |
| Author(s) |
Yao Su, Sunghwan Park, Joohyun Park |
| On-Site Speaker (Planned) |
Yao Su |
| Abstract Scope |
The structure of surface oxide layers and non-metallic inclusions (NMIs) affects the mechanical and corrosion properties of steel powders. In the present study, low-alloy high-strength steel powders produced by the electrode induction gas atomization (EIGA) process with different particle sizes were investigated using XPS and TEM to characterize the thickness and structure of surface oxide layers. The results indicate that the specific surface area and surface oxide layer significantly influence the total oxygen content of the powders. The oxide layer exhibits a laminated structure mainly composed of Fe, Mn and O. In addition, the types and size distributions of NMIs in both electrodes and atomized powders were analyzed by SEM combined with thermodynamic calculations using FactSageTM thermochemical computing software. The electrolytic extraction method was further employed to confirm the NMIs morphology and chemical composition. These findings provide guidance for optimizing powder materials for PM-HIP or additive manufacturing (AM) processes. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Iron and Steel, Powder Materials, Process Technology |