Laser-based Powder Bed Fusion of dispersion strengthened CoCrNi by ex-situ addition of TiN

Malladi, Sri Bala Aditya; Cordova, Laura; Guo, Sheng Min; Nyborg, Lars

doi:10.1016/j.procir.2022.08.168

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…For example, the equiatomic CrMnFeCoNi HEA (one of the well-known HEAs) shows low strength arising from its face-centred cubic (fcc) structure, despite its high ductility and toughness. Therefore, several researchers have attempted to increase the strength using secondary phase or dispersive particles [7][8][9]. Other studies have developed body-centred cubic (bcc) and hexagonal close-packed HEAs/MEAs with limited slip systems compared to the fcc structure [10,11].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and tensile strength of electrodeposited Fe-rich bcc FeCoNi medium-entropy alloys

Watanabe

Yamamoto

Miyamoto

et al. 2023

Materials Science and Technology

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Crystal grain refinement in high- and medium-entropy alloys is an effective approach to obtaining good strength as well as ductility. An FeCoNi medium-entropy alloy with a wide range of grain sizes was fabricated by electrodeposition. The alloy had a metastable bcc structure with Fe–36 at.% Co–21 at.% Ni composition and heterogeneous distribution of grain sizes ranging from 20 nm to 15 µm. Moreover, the alloy possessed a tensile strength of 1.2 GPa, and a fracture elongation of 6.3 % without secondary phase. The excellent mechanical properties of the alloy can be attributed to its bcc phase and heterogeneous grain sizes extending to the nanoscale. GRAPHICAL ABSTRACT

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