Microstructures having one or more ordered phases (or intermetallic compounds) and a disordered solid solution A microstructure consisting of a mixture of intermetallic phases. The structural classification of a multi-principal element alloys is classified into one or more microstructures composed of disordered solid solutions. Secondly, due to the different atom types and sizes of the multi-principal element alloys, a severe lattice distortion is caused, and the shear modulus between the constituent atoms does not match, which may contribute to hardening. The design of multi-principal element alloys represents a new strategy for developing unique engineered materials with targeted properties that cannot be achieved with traditional alloy designs that rely on one element and then add other elements to improve the properties of the alloy.Īt present, studies on multi-principal element alloys show that the main factor affecting the entropy value is still the structure of the alloy. Therefore, the main element alloy is characterized by the synergy of various elements. The concentration of each element is between 5% and 35%, and no element content exceeds 50%. Compared with conventional alloys, multi-principal element alloys are alloys composed of five or more elements in equimolar ratios. Multi-principal element alloys, also known as high-entropy alloys (HEAs), have been proven to have superior properties such as ultra-high strength, high hardness, high-temperature oxidation resistance, wear resistance, corrosion resistance, and thermal stability, in materials science and have received considerable attention the engineering field. The research method in this paper is used to design multi-principal element alloys or other various complex materials that meet the target performance. The results showed that the disordered BCC A2 phase and the ordered BCC B2 phase are the ductile phases, while the Laves phase is brittle. Formation heat, binding energy, and elastic constants confirmed the structural stability and provide a theoretical basis for designing alloys with target properties. Thermodynamic analysis predicted the composition phase and percentage of the alloy. By adjusting the percentages of Ti and Al atoms, the effect of the atomic percentage content on ordered phases’ structural stability in multi-principal element alloys are studied. In this paper, the design, and properties of the ordered phases in Fe 25Cr 25Ni 25Ti xAl (25-x) (subscript represents the atomic percentage) multi-principal element alloys are studied. By adjusting the atomic composition, structure, or configuration of the material and combining different processes, new materials with target properties obtained. Material genetic engineering studies the relationship between the composition, microstructure, and properties of materials.
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