Synthesis and characterization of AlCoCrCuFeZnx high-entropy alloy by mechanical alloying

Microstructural Evolution of AlCoCrFeNiSi High-Entropy Alloy Powder during Mechanical Alloying and Its Coating Performance

“…However, the MA process, in which the microstructure and properties of the powders can change significantly with the milling time, was not investigated in detail. Furthermore, lots of papers focused on the evolution of the particle size and the phase structure of HEA powders during mechanical alloying, but without a coating deposition [ 20 , 21 , 22 , 23 ]. In these papers, different alloy systems composed of common elements such as Al, Co, Cr, Cu, Fe, Mn, Ni, Ti, and Zn were chosen as the objects of study.…”

“…In the AlCoCrFeNiSi system, elements such as Al, Co, Cr, Fe, and Ni are ones with good ductility, while Si is a brittle element. For such a ductility–brittleness system, the evolution of the characteristics of the powder during mechanical alloying must be quite complex and different from the ductility–ductility ones mentioned above [ 20 , 21 , 22 , 23 ]. The detailed evolution of the surface morphology, particle size distribution, cross-sectional microstructure, and phase structure of the powder during mechanical alloying was investigated.…”

Processing and characterisation of nano crystalline AlCoCrCuFeTix high-entropy alloy

“…Here, low-intensity peaks disappear and a further decrease in intensity of the high-intensity peak occurs. Moreover, peak broadening occurs due to crystal size refinement, high lattice strain and decrease in crystallinity [6,16,22].…”

“…Materials with higher melting points have lower diffusion coefficients. Hence, in the current investigation, Fe dissolves all elemental peaks and acts as a solvent for solid solution formation [13,16]. The crystallite size and lattice strain of the alloys can be calculated from peak broadening of XRD using Scherer formula and Williamson-Hall analysis, given below in Equations ( 6) and (7).…”

Zinc Addition on AlCoFeNi Multicomponent System Produced by Mechanical Alloying, Microstructural and Morphological Effect

“…HEAs have unusual chemistry, outside conventional metallurgy, since they contain at least five elements in concentrations of between 5 and 35%, and they tend to form simple BCC and/or FCC type solutions [1]. Conventional metallurgy indicates that for alloys development, one or two elements are selected that provide the main characteristics and attributes, and elements secondary in smaller quantities are added to modify the microstructure and definitive properties [2]. Different authors have reported how each element has a direct effect on different HEAs physical and chemical properties.…”