Abstract
Six pre-alloyed high entropy alloys powders from the CoCrFeNiMnzAlxCuy family were used to manufacture samples through Laser Powder Bed Fusion technology. These samples were used to assess the manufacturability, microstructure and mechanical properties of the developed alloys. It was found that increasing the Al concentration promoted the formation of a BCC/B2 phase, increasing the hardness and having a direct positive impact on the tensile properties. However, adding more aluminium than what can be found in the Al0.5CoCrFeNi alloy led to extensive manufacturability issues that hindered the tensile properties. On the other hand, the Cu concentration did not appear to yield any significant impact on the microstructures and mechanical properties of the alloys. The considered additively manufactured alloys presented an overall higher hardness than their conventionally manufactured counterparts, but a lower ductility. Thermal treatment led to the precipitation of a σ phase in Al-containing HEAs, and of a secondary FCC phase in Cu-containing alloys. Finally, this paper proves the potential of the CoCrFeNiAlx alloy family compared to single-phase stainless steels such as 316L and two-phase stainless steels such as SAF 2507.
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References
Zhang, Y., et al.: Microstructures and properties of high-entropy alloys. Prog. Mater. Sci. 61, 1–93 (2014). https://doi.org/10.1016/j.pmatsci.2013.10.001
Cantor, B., Chang, I.T.H., Knight, P., Vincent, A.J.B.: Microstructural development in equiatomic multicomponent alloys. Mater. Sci. Eng. A 375–377, 213–218 (2004). https://doi.org/10.1016/j.msea.2003.10.257
Zhang, Y., Yang, X., Liaw, P.K.: Alloy design and properties optimization of high-entropy alloys. JOM 64, 830–838 (2012). https://doi.org/10.1007/s11837-012-0366-5
Ye, Y.F., Wang, Q., Lu, J., Liu, C.T., Yang, Y.: High-entropy alloy: challenges and prospects. Mat. Today 19, 349–362 (2016). https://doi.org/10.1016/j.mattod.2015.11.026
Shams, S.A.A., et al.: Low-cycle fatigue properties of CoCrFeMnNi high-entropy alloy compared with its conventional counterparts. Mater. Sci. Eng. A 792, 139661 (2020). https://doi.org/10.1016/j.msea.2020.139661
Bartolomeu, F., et al.: 316L stainless steel mechanical and tribological behavior—A comparison between selective laser melting, hot pressing and conventional casting. Addit. Manuf.. Manuf. 16, 81–89 (2017). https://doi.org/10.1016/j.addma.2017.05.007
**an, X., et al.: Precipitation and its strengthening of Cu-rich phase in CrMnFeCoNiCux high-entropy alloys. Mat. Sci. Eng. A 713, 134–140 (2018). https://doi.org/10.1016/j.msea.2017.12.060
Zhu, Z.G., et al.: Hierarchical microstructure and strengthening mechanisms of a CoCrFeNiMn high entropy alloy additively manufactured by selective laser melting. Scripta Mater. 154, 20–24 (2018). https://doi.org/10.1016/j.scriptamat.2018.05.015
Zhou, P.F., **ao, D.H., Wu, Z., Ou, X.Q.: Al0.5FeCoCrNi high entropy alloy prepared by selective laser melting with gas-atomized pre-alloy powders. Mater. Sci. Eng. A 739, 86–89 (2019). https://doi.org/10.1016/j.msea.2018.10.035
Karlsson, D., et al.: Elemental segregation in an AlCoCrFeNi high-entropy alloy – a comparison between selective laser melting and induction melting. J. Alloy. Compd. 784, 195–203 (2019). https://doi.org/10.1016/j.jallcom.2018.12.267
Gao, J., et al.: Fabricating antibacterial CoCrCuFeNi high-entropy alloy via selective laser melting and in-situ alloying. J. Mater. Sci. Technol. 102, 159–165 (2022). https://doi.org/10.1016/j.jmst.2021.07.002
Lee, C., et al.: Lattice distortion in a strong and ductile refractory high-entropy alloy. Acta Mater. 160, 158–172 (2018). https://doi.org/10.1016/j.actamat.2018.08.053
Callister, Jr.: WD Fundamentals of Materials Science and Engineering, 5th edn. John Wiley & Sons, Inc.
Wang, W.-R., Wang, W.-L., Wang, S.-C., Tsai, Y.-C., Lai, C.-H., Yeh, J.-W.: Effects of Al addition on the microstructure and mechanical property of AlxCoCrFeNi high-entropy alloys. Interm. 26, 44–51 (2012). https://doi.org/10.1016/j.intermet.2012.03.005
Du, C., Hu, L., Pan, Q., Chen, K., Zhou, P., Wang, G.: Effect of Cu on the strengthening and embrittling of an FeCoNiCr-xCu HEA. Mater. Sci. Eng. AA 832, 142413 (2022). https://doi.org/10.1016/j.msea.2021.142413
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This work is supported by the French Defense Innovation agency (AID) from the French Army Ministry. The authors also gratefully acknowledge the helpful comments and suggestions of the reviewers, which have improved the presentation.
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Barth, E., Hor, A. (2024). Manufacturability of CoCrFeNiMnzAlxCuy High Entropy Alloy by Laser Powder Bed Fusion. In: Mabrouki, T., Sahlaoui, H., Sallem, H., Ghanem, F., Benyahya, N. (eds) Advances in Additive Manufacturing: Materials, Processes and Applications. AIAM 2023. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-47784-3_3
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