Nanosized precipitates and dislocation networks reinforced C-containing CoCrFeNi high-entropy alloy fabricated by selective laser melting

By Wenqian Wu, Rui Zhou, B. Wei, S. Ni, Y. Liu, M. Song. Materials Characterization, 2018

155 citations recorded by the source corpus.

Abstract In this paper, we report a selective laser melted C-containing CoCrFeNi high-entropy alloy (HEA) with unique cellular and columnar subgrain structures. The subgrain boundaries are made of dislocation networks decorated by the segregation of Cr element and nanosized M23C6-type carbides. Structural characterization of dislocations and dislocation reactions in dislocation networks was conducted using high-resolution transmission electron microscopy. The high strength of the C-containing HEA is attributed to dislocation networks strengthening and nanosized carbides strengthening. These findings can provide a guidance for developing HEAs with superior mechanical properties, particularly high strength.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/ea0e063d8274a239a49f3ffff19b25ab3bf34122

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In Aerospace Engineering

1. Jae Wung Bae
2. Hyoung-Seop Kim
3. J. Moon

In Mechanical Engineering

1. Jae Wung Bae
2. Hyoung-Seop Kim
3. J. Moon

Citations in the corpus

• Superior tensile properties of 1%C-CoCrFeMnNi high-entropy alloy additively manufactured by selective laser melting (2020, background): “In most cases, the high dislocation density has a key effect on the high strength level in SLM-processed materials [11,22].”