Nano Particles Reinforced and Directional Solidification in High Entropy Alloys

Nano-precipitation strengthening is an extremely effective method for enhancing the mechanical properties of metallic materials, significantly improving their strength, toughness, and wear resistance. Directional solidification techniques provide a valuable means to control the crystal growth rate and orientation of high-entropy alloys, making them an essential tool for studying the solidification process of these alloys and enriching related theories. This paper systematically presents the recent research progress and key achievements of our research team in the areas of composition design, material preparation, phase formation mechanisms, crystal growth patterns, and strengthening mechanisms of high-entropy alloys. Through the exploration of various compositional combinations, we propose a composition design strategy based on valence electron concentration, revealing the relationship between the microstructure and macroscopic properties of the alloys. Furthermore, we delve into the mechanisms by which nanoprecipitates influence the mechanical properties of the materials. These studies not only provide a theoretical foundation for the application of high-entropy alloys but also offer guidance for future material design and optimization.