| Autor: |
Zhenghong Fu, Yong Zhang, Zhiming Li, Yiping Lu, Xiaoxiang Wu, Hui Wang |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 24, Iss , Pp 3300-3308 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2023.03.224 |
| Popis: |
Achieving favorable strength-ductility synergy has long been one of the main challenges for developing structural materials. The current work reports a selective laser melted eutectic high-entropy alloy with ultrahigh-strength (yield strength 1446 MPa, ultimate tensile strength 1737 MPa) and good ductility (elongation 11%), achieved by tuning the hierarchically heterogeneous microstructures from micro-to nano-scale. Both of nano-sized B2 and L12 phases effectively hinder the dislocation motion and thus significantly improve the strengths. The cellular face-centered cubic matrix ensures the uniform deformation of the alloy, and the possible brittle failure of the hard B2 phase is alleviated by Cr-rich clusters. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
