Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas Atomization
Gas atomization is a widely used method to produce the raw powder materials for additive manufacturing (AM) usage. After the metal alloy is melted to fusion, gas atomization involves two relatively independent processes: liquid breakup and droplet solidification. In this paper, the solidification be...
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| Format: | Article |
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MDPI AG
2021-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/18/5188 |
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| author | Hang Qi Xianglin Zhou Jinghao Li Yunfei Hu Lianghui Xu |
| author_facet | Hang Qi Xianglin Zhou Jinghao Li Yunfei Hu Lianghui Xu |
| author_sort | Hang Qi |
| collection | DOAJ |
| description | Gas atomization is a widely used method to produce the raw powder materials for additive manufacturing (AM) usage. After the metal alloy is melted to fusion, gas atomization involves two relatively independent processes: liquid breakup and droplet solidification. In this paper, the solidification behavior of powder during solidification is analyzed by testing the powder’s properties and observing microstructure of a martensitic stainless steel (FeCrNiBSiNb). The powder prepared by gas atomization has high sphericity and smooth surface, and the yield of qualified fine powder is 35%. The powder has typical rapid solidification structure. Collision between powders not only promotes nucleation, but also produces more satellite powder. The segregation of elements in powder is smaller as the result of high cooling rate which can reaches 4.2 × 10<sup>5</sup> K/s in average. Overall, the powder prepared by gas atomization is found to have good comprehensive properties, desired microstructure, and accurate chemical component, and it is suitable for various additive manufacturing techniques. |
| first_indexed | 2024-03-10T07:28:45Z |
| format | Article |
| id | doaj.art-27114c631baf4d8e8f1fc652db60f169 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T07:28:45Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-27114c631baf4d8e8f1fc652db60f1692023-11-22T14:00:08ZengMDPI AGMaterials1996-19442021-09-011418518810.3390/ma14185188Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas AtomizationHang Qi0Xianglin Zhou1Jinghao Li2Yunfei Hu3Lianghui Xu4State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of Mechanical Engineering, McGill University, Montreal, QC H2A 0C3, CanadaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaGas atomization is a widely used method to produce the raw powder materials for additive manufacturing (AM) usage. After the metal alloy is melted to fusion, gas atomization involves two relatively independent processes: liquid breakup and droplet solidification. In this paper, the solidification behavior of powder during solidification is analyzed by testing the powder’s properties and observing microstructure of a martensitic stainless steel (FeCrNiBSiNb). The powder prepared by gas atomization has high sphericity and smooth surface, and the yield of qualified fine powder is 35%. The powder has typical rapid solidification structure. Collision between powders not only promotes nucleation, but also produces more satellite powder. The segregation of elements in powder is smaller as the result of high cooling rate which can reaches 4.2 × 10<sup>5</sup> K/s in average. Overall, the powder prepared by gas atomization is found to have good comprehensive properties, desired microstructure, and accurate chemical component, and it is suitable for various additive manufacturing techniques.https://www.mdpi.com/1996-1944/14/18/5188gas atomizationrapid solidificationmicrostructure |
| spellingShingle | Hang Qi Xianglin Zhou Jinghao Li Yunfei Hu Lianghui Xu Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas Atomization Materials gas atomization rapid solidification microstructure |
| title | Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas Atomization |
| title_full | Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas Atomization |
| title_fullStr | Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas Atomization |
| title_full_unstemmed | Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas Atomization |
| title_short | Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas Atomization |
| title_sort | performance testing and rapid solidification behavior of stainless steel powders prepared by gas atomization |
| topic | gas atomization rapid solidification microstructure |
| url | https://www.mdpi.com/1996-1944/14/18/5188 |
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