Evaluation of high-frequency induction heat sintering and conventional sintering in AlxCoCrFeMnNi high-entropy alloys

Ruiz-Esparza-Rodríguez, M.A., Garay-Reyes, C.G., Mendoza-Duarte, J.M., Estrada-Guel, I., Hernández-Rivera, J.L., Cruz-Rivera, J.J., Gutiérrez-Castañeda, E., Gonzalez Sanchez, Sergio, Garay-Tapia, A.M. and Martínez-Sánchez, R. (2022) Evaluation of high-frequency induction heat sintering and conventional sintering in AlxCoCrFeMnNi high-entropy alloys. Journal of Alloys and Compounds, 910. p. 164780. ISSN 0925-8388

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Abstract

AlxCoCrFeMnNi high-entropy alloys with different aluminum concentrations (x = 0.5, 1, and 1.5 at%) were synthesized by mechanical alloying followed by consolidation using two different sintering methods, conventional (CS) and high-frequency induction heat + conventional (HFIHS + CS). The results show the presence of FCC, BCC, and B2ordered phases in all systems, regardless of the sintering method. The BCC phase exhibits morphological changes (cuboidal-type and plate-like) associated with the two sintering methods involving different diffusion rates and affecting the hardness values. The M23C6 carbide is identified in systems sintered by the CS method; meanwhile, the M7C3 carbide is identified in the HFIHS + CS method. Finally, the HFIHS + CS method results in a higher level of densification (~95%) than the CS method (~80%).

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