| Autor: |
Yukun Lv, Yuzhe Wang, Jie Zhang, Yutian Lei, Pingtao Song, Rengen Ding, Xiaofei Yao, Jian Chen |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 28, Iss , Pp 4358-4362 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2024.01.004 |
| Popis: |
The as-cast (Fe50Mn30Co10Cr10)97C2Mo1 HEA (high entropy alloy) was cold rolled to 90 % (CR90 %), followed by annealing at different temperatures (400 °C, 500 °C, 600 °C). Their microstructure and mechanical properties have been systematically investigated. The results show that this HEA has a single FCC structure, and that annealing at 500 °C and 600 °C leads to the formation of Cr-rich σ phase. The CR90 % HEA exhibits the tensile strength of 1926 MPa and 4 % elongation. However, annealing at 400 °C and 500 °C makes the tensile strength improve to ∼2078 MPa and ∼2060 MPa, respectively, while their plasticity does not change significantly. Annealing at 600 °C results in a significant reduction in the strength (∼1650 MPa) while a slight increase in plasticity. The element segregation and the formation of nano-sized (Fe, Mn)-rich precipitates are contributed to the significant increase in tensile strength of the HEA annealed at 400 °C. Nevertheless, annealing at 600 °C leads to a decrease in the density of defects (e.g. dislocations) caused by cold rolling and the increase in the grain size, which finally resulting in a reduction in strength. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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