Co-existence of nanoprecipitates with solute nitrogen evades the strength-ductility trade-off in metastable high entropy alloy
| Autor: | Zhaowen Geng, Zhongliang Shu, Chao Chen, Jinru Luo, Miao Song, Ruidi Li, Kechao Zhou |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Materials Research Letters, Vol 12, Iss 6, Pp 433-441 (2024) |
| Druh dokumentu: | article |
| ISSN: | 21663831 2166-3831 |
| DOI: | 10.1080/21663831.2024.2340637 |
| Popis: | N and Ti co-doped Fe45Mn35Co10Cr10 alloys were prepared by Laser-Directed Energy Deposition (L-DED). We find that precipitate reinforcement of TiN particles introduced by harnessing N solid solution can result in a microstructure featuring attached MnO and TiN composite nanoparticles. Co-doped samples exhibit a notable 69% increase in yield strength compared with that of the free-doped, rising from 310 MPa to 533 MPa, maintaining 44.5% elongation. Even at 77 K, the co-doped alloy displays ultra-high strength, approximately 1400 MPa. These findings on metastable high entropy alloys through additive manufacturing open new avenues for their application in various fields. |
| Databáze: | Directory of Open Access Journals |
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