Study on forming process and microstructure of FeCrAl-ODS alloy by selective laser melting
Powder preparation, forming process, microstructure, oxide particles, and precipitates of FeCrAl-ODS (Oxide Dispersion Strengthened) alloy fabricated by Selective Laser Melting (SLM) were systematically studied in this paper. Results indicate that after adding 0.1 wt% Y₂O₃ via ball milling, the form...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425000754 |
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| Summary: | Powder preparation, forming process, microstructure, oxide particles, and precipitates of FeCrAl-ODS (Oxide Dispersion Strengthened) alloy fabricated by Selective Laser Melting (SLM) were systematically studied in this paper. Results indicate that after adding 0.1 wt% Y₂O₃ via ball milling, the formed samples showed fewer defects and a 20 HV increase in hardness under the same parameters. The optimal process parameters were: laser power 250 W, scanning speed 900 mm/s, and hatch spacing 0.09 mm. The longitudinal section of the SLM-formed FeCrAl-ODS alloy exhibited a typical molten pool structure with a layered distribution characteristic of SLM-formed alloys. A higher laser coupling efficiency and melt pool temperature led to a lower proportion of subgrains composed of low-angle grain boundaries in the FeCrAl-ODS alloy. Independent α′ phase (Cr-rich phase) and α′ phase attached to Y₂O₃ were observed in the SLM-formed FeCrAl-ODS alloy. Thess results are of great significance for developing ODS alloys fabricated via additive manufacturing. |
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| ISSN: | 2238-7854 |