Deciphering the role of solidification cell structure in the hydrogen embrittlement of CoCrFeNi medium-entropy alloy fabricated by laser-powder bed fusion: Insights from annealing treatments
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Deciphering the role of solidification cell structure in the hydrogen embrittlement of CoCrFeNi medium-entropy alloy fabricated by laser-powder bed fusion: Insights from annealing treatments
Deciphering the role of solidification cell structure in the hydrogen embrittlement of CoCrFeNi medium-entropy alloy fabricated by laser-powder bed fusion: Insights from annealing treatments
Jung, J. Y., Jung, H., An, Y. H., Lee, S. Y., Zhao, Y., Lau, K. B., Wang, P., & Lee, D.-H. (2025). Deciphering the role of solidification cell structure in the hydrogen embrittlement of CoCrFeNi medium-entropy alloy fabricated by laser-powder bed fusion: Insights from annealing treatments. Corrosion Science, 243, 112595. https://doi.org/10.1016/j.corsci.2024.112595
Abstract:
The role of solidification cell structure in hydrogen embrittlement (HE) in laser-powder bed fusion fabricated CoCrFeNi medium-entropy alloy is investigated by comparing as-built and annealed conditions. Annealing at 1100 °C dissolves the cell structure and induces partial recrystallization. This slightly reduced the strength but significantly improves HE resistance by suppressing hydrogen-assisted intergranular cracking. The results are discussed in terms of the changes in hydrogen trapping/diffusion behavior and deformation behavior upon removal of cell structure, as investigated through thermal desorption spectroscopy, Ag decoration, and digital image correlation technique.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the National Research Foundation, Singapore - Low-Carbon Energy Research
Grant Reference no. : U2305D4001