Microstructure and microhardness of high entropy alloys with Zn addition: AlCoFeNiZn and AlCoFeNiMoTiZn

Avila-Rubio, M.A.; Carreño-Gallardo, C.; Ramirez, José Martin Herrera; García-Grajeda, B.A.; Pérez-González, Francisco A.; Ramírez-Ramírez, Javier H.; Garza-Montes-de-Oca, Nelson F.; Baldenebro-López, F.J.

doi:10.1016/j.apt.2021.10.012

Cited by 8 publications

(1 citation statement)

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“…In addition, the samples produced a tensile yield strength of 1 GPa with a considerable amount of ductility. Avila-Rubio et al [17] developed three equiatomic AlCoFeNiZn, AlCoFeNiMoTi, and AlCoFeNiMoTiZn HEAs and the results indicated that the incorporation of Zn atoms promoted the BCC structure, decreased the crystallite size much, and introduced more lattice distortions. Pan et al [18] synthesized FeCoNi(MoW)x (x = 0.2, 0.3, 0.5) HEAs using the vacuum arc melting method.…”

Section: Introductionmentioning

confidence: 99%

Influence of V and Zn in FeCrCuMnTi High-Entropy Alloys on Microstructures and Uniaxial Compaction Behavior Prepared by Mechanical Alloying

2021

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The densification behavior of FeCrCuMnTi (HEA1), FeCrCuMnTiV (HEA2), and FeCrCuMnTiVZn (HEA3) equiatomic high-entropy alloys (HEAs) was explored using different uniaxial quasi-static controlled compaction (1 mm/min). These HEAs were synthesized by mechanical alloying (MA, speed: 300 rpm, BPR: 10:1, time: 25 h). Various phase formations, structural characteristics (crystallite size, lattice strain, and lattice constant), thermo-dynamic calculations, powder surface morphologies, detailed microstructural evolutions, and chemical compositions were examined using X-ray diffraction, high-resolution scanning electron microscopy, and high-resolution transmission electron microscopy. The XRD results revealed the formation of multiple solid solutions (FCC, BCC, and HCP) due to the variation in entropy, and the presence of high-strength elements (Cr, Ti, and V) in the developed HEA alloys. The synthesized powders were consolidated into bulk green samples with different compaction pressures starting from 25 to 1100 MPa under as-milled and milled under stress recovery conditions (150 °C, 1 h). The incorporation of V in the FeCrCuMnTi HEA resulted in improved densification due to a greater reduction in particle size, and high configurational entropy. Furthermore, the stress-recovered powder samples produced more relative density owing to the elimination of lattice strain. Several linear and non-linear compaction models were applied to predict densification behavior. The non-linear Cooper and Eaton model produced the highest regression coefficients compared to the other models.

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Section: Introductionmentioning

confidence: 99%