GRK2802: Correlation Between Particle Size, Secondary Dendrite Arm Spacing, and Local Cooling Rate in Gas-atomized Stainless Steel Powders for Additive Manufacturing
References to related material | https://doi.org/10.1016/j.powtec.2025.121096 | |
Type of the data | Dataset | |
Type of the data | Image | |
Type of the data | Text | |
Total size of the dataset | 33468572 | |
Author | Bellé, Matheus Roberto | |
Author | Sherstneva, Anastasiia | |
Author | Hauser, Michael | |
Author | Wendler, Marco | |
Author | Volkova, Olena | |
Upload date | 2026-04-27T14:58:20Z | |
Publication date | 2026-04-27T14:58:20Z | |
Publication date | 2026-04-27 | |
Abstract of the dataset | Additive manufacturing (AM) demands metallic powders with controlled microstructure and morphology to ensure high-performance components, especially in processes like Laser Powder Bed Fusion (PBF-LB). Gas atomization techniques such as Vacuum Inert Gas Atomization (VIGA) and Electrode Inert Gas Atomization (EIGA) are widely employed for producing stainless steel powders tailored for AM applications. In this study, the solidification behavior of such powders is investigated by analyzing the secondary dendrite arm spacing (SDAS) as a function of particle size (15–170 µm). SDAS is used as a microstructural indicator to estimate local cooling rates during atomization. Experimental results reveal that SDAS increases linearly for particles ≤ 100 µm and exponentially for larger particles, independent of steel composition, atomization gas, or method. Derived cooling rates, ranging from 104 to 107 K s-1, closely align with predictions from dimensionless criteria, affirming the relevance of such models under rapid solidification. Conversely, regressions developed for slower cooling conditions underestimate these values, emphasizing the need for high-fidelity models in atomization contexts. Notably, fine powders (< 25 µm) showed evidence of metastable δ-ferrite formation due to ultrafast cooling, as confirmed by magnetic saturation and XRD analyses. This work strengthens the predictive control of powder solidification behavior, aiding in the design of high-performance AM components. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2245 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Specification of the discipline(s) | 4::43 | |
Title of the dataset | GRK2802: Correlation Between Particle Size, Secondary Dendrite Arm Spacing, and Local Cooling Rate in Gas-atomized Stainless Steel Powders for Additive Manufacturing | |
Project abstract | The focus of this project is to investigate the interaction of a Al-killed low-sulphur manganese-boron steel and a highly basic desulphurisation slag with MgO-C products based on recyclates and environmentally friendly binders. In order to determine the influence of thermophysical properties on the interaction with new refractory materials, the viscosity, surface tension and density of the liquid aluminium-killed steel in undesulphurised and desulphurised condition and the slags with high sulphur capacity are investigated as a function of [S], [B], (SiO2), (MgO), (S) and temperature. By finger testing a MgO-C product in the molten steel and slag, the refractory samples are obtained for further analysis of the interactions using optical microscopy and SEM/EDX. The (S)/[S] distribution between the MBW1500 steel and the slag is investigated in a crucible of MgO-C products based on recyclates in the MFG-40. The inclusion population of the steel samples after examination via Finger Testing is interpreted by chemical analysis and analysed by optical examination methods such as light microscopy combined with AFA (Automatic Feature Analysis) in P-SEM. The spinel formation between recycled MgO-C material and liquid steel is specifically studied in SEM/EDX microscopy. | |
Funding Acknowledgement | The dataset was generated within the framework of the Research Training Group GRK 2802 (project ID: 461482547) funded by the German Research Foundation (DFG). | |
Public project website(s) | https://tu-freiberg.de/en/research/grk2802 | |
Project title | GRK2802_P5_Research into the effect of MgO-C products based on recyclates and environmentally friendly binders on the sulphidic purity of the steels and the spinel formation |