材料科学
亚稳态
合金
延展性(地球科学)
高熵合金
氮气
热力学
熵(时间箭头)
冶金
蠕动
化学
物理
有机化学
作者
Zhaowen Geng,Zhongliang Shu,Chao Chen,Jinru Luo,Miao Song,Ruidi Li,Kechao Zhou
标识
DOI:10.1080/21663831.2024.2340637
摘要
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.
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