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

Abstract

In the present study, non-equiatomic AlCrFeMn x−TiNi high-entropy alloys bearing cost-effective elements were developed in light of enhancing mechanical strength. The Al5Cr12Fe35Mn28Ni20 HEA was used as a reference. However, the HEA containing Ti (Ti-HEA) was designed with a composition of Al5Cr12Fe35Mn23Ni20Ti5. The microstructural characteristics were studied by X-ray diffraction, electron probe micro-analysis, and electron backscattering diffraction. Subsequently, the mechanical properties were determined using micro-hardness, tensile and compression tests. Whereas the Ti-free HEA displayed a single FCC structure, a multi-phase structure was observed in the Ti-HEA. The mechanical tests showed that the Ti element significantly enhanced the strength. The strengthening effect was more intense during compression loading as the Ti-HEA exhibited superior combination of compressive strength and ductility (2.35GPa at 50% strain without fracture).

Investigation of Cu-diamond/Cu-diamond-high-entropy alloys bi-layer coating via mechanical alloying

“…[8][9][10] In this context, the excellent mechanical properties and low CTE of highentropy alloys (HEA) at room temperature offer the opportunity to broaden the choice of substrates. [11][12][13][14] For example, Lin et al 15 found that CoCrFeNiTiNbBx HEA coating can significantly improve the wear resistance of the matrix. Huang et al 16 proved that FeCoNiCu HEA has lower thermal expansion coefficient through the first principle.…”

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

“…High-entropy alloys (HEAs) are defined as alloys that consist of five or more elements in roughly equal or nearly equal proportions (Yeh et al , 2004; Cantor et al , 2004). HEAs are considered a prestigious type of alloy as they have promising properties, for instance, superior strength–ductility balance, as well as significant solid-solution strengthening (Zhang, 2014; Oh et al , 2016; Elkatatny et al , 2023) and notable high wear resistance (Hsu et al , 2010; Chuang et al , 2011). Therefore, HEAs exhibit considerable potential for utilization in structural applications.…”

Corrosion resistance of nonequiatomic FeNiCrMnAlx high entropy alloys in hexamine as inhibitor in 3.5% NaCl

“…Al 5 Cr 12 Fe 35 Mn 28 Ni 20 is one of the HEAs that has a single-phase structure (FCC) and has medium mechanical properties. [34][35][36] Alloying with Al was one of the strengthening mechanisms used to enhance its properties. [37] Thus, the aim of this work is to investigate the effect of Al additions on the corrosion resistance of Fe 35 Ni 20 Cr 12 Mn (28−x) Al (5+x) HEAs in 3.5% NaCl.…”