Microstructure and Mechanical Properties Investigation of New Al₁₀Cr₁₂Mn₂₈Fe_(50-x)Ni_(x) High Entropy Alloys

Abstract

In the present study, two newly developed non-equiatomic high entropy Al10Cr12Mn28Fe(50-x)Ni(x) alloys (x= 20 & 15 at%, namely: Ni20 & Ni15, respectively) are investigated. The studied HEAs were designed based on thermodynamic principles to maintain high ductility and improve strength. Ingots were prepared using arc-melting then microstructure examinations and mechanical properties for the as-cast alloys were done. The mechanical properties were enhanced for the as-cast material, compared with previously introduced HEAs of the same system, namely Al5Cr12Mn28Fe35Ni20, (Al5) and Al10Cr12Mn23Fe35Ni20, (Al10). Al10Cr12Mn28Fe30Ni20 (Ni20) HEA generally shows the highest compressive yield strength which was improved by ∼7% when compared with previously introduced Al10.

Hot deformation behavior and constitutive modeling of a cost-effective Al8Cr12Mn25Ni20Fe35 high-entropy alloy

“…4. The homogenization treatment and subsequent hot-rolling deformation significantly demoted the initial cast structure (i.e., columnar dendritic morphology), which commonly appears in as-cast HEAs [41,42] as a grain structure. The features of the hot-rolled grain structure, such as the grain and annealing boundaries, are clearly visible, as shown in Fig.…”

Optimizing corrosion resistance of Fe35Ni20Cr12Mn28Al5 high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling

“…Fe 35 Ni 20 Cr 12 Mn 28 Al 5 HEA is considered one of the low-cost single-phase HEAs with an FCC phase structure and moderate mechanical properties (Elkatatny et al , 2018). Substituting Mn with Al by 5 At.% and cold rolling were used to improve its properties (Elkatatny et al , 2019; Abdelghany et al , 2020). Therefore, the current study aims to investigate the influence of Al content and the cold rolling impact on the corrosion behavior of Fe 35 Ni 20 Cr 12 Mn 28 Al 5 HEA in 1 M H 2 SO 4 .…”

Microstructural strengthening and mechanical performance of Ti-bearing Al5Cr12Fe35Mn28Ni20 high-entropy alloy

“…Another study for the same HEA system revealed a strengthening approach 5 at.-% Mn with Al while maintaining the ductility and the single FCC phase structure [24]. In a further study, the same alloy system was strengthened by substituting Ni with Al and by substituting Fe with Al [25]. Both approaches for solid solution strengthening showed high compressive work hardening rates; however, the yield strength was moderate with an average of 330 MPa.…”