摘要
The development of high-performance structural and functional materials is vital in many industrial fields.High-and medium-entropy alloys(H/MEAs)with superior comprehensive properties owing to their specific microstructures are promising candidates for structural materials.More importantly,multitudinous efforts have been made to regulate the microstructures and the properties of H/MEAs to further expand their industrial applications.The various heterostructures have enormous potential for the development of H/MEAs with outstanding performance.Herein,multiple heterogeneous structures with single and hierarchical heterogeneities were discussed in detail.Moreover,preparation methods for compositional inhomogeneity,bimodal structures,dualphase structures,lamella/layered structures,harmonic structures(core-shell),multiscale precipitates and heterostructures coupled with specific microstructures in H/MEAs were also systematically reviewed.The deformation mechanisms induced by the different heterostructures were thoroughly discussed to explore the relationship between the heterostructures and the optimized properties of H/MEAs.The contributions of the heterostructures and advanced microstructures to the H/MEAs were comprehensively elucidated to further improve the properties of the alloys.Finally,this review discussed the future challenges of high-performance H/MEAs for industrial applications and provides feasible methods for optimizing heterostructures to enhance the comprehensive properties of H/MEAs.
开发高性能结构/功能材料对于大多数工业领域具有重要的意义。中/高熵合金因其特定的微观结构表现出优异的综合性能,是极具潜力的结构材料。更重要的是,通过调控合金的微观组织并优化其性能已经成为拓展合金工业应用的重要措施。已有的研究表明,构建多种异质结构有利于显著提升中/高熵合金的综合性能。本文详细讨论了具有单级和多级异质性的多异质结构。此外,还系统地综述了中/高熵合金中成分不均匀性、双峰结构、双相结构、片状/层状结构、谐波结构(核壳)、多尺度沉淀物及特定微观结构耦合异质结构的制备方法。深入讨论了不同异质结构诱发的变形机制,以探索异质结构与中/高熵合金性能优化之间的关系。全面阐释了异质结构和先进的微观结构优化中/高熵合金性能的贡献,以进一步改善合金的性能。最后,讨论了高性能中/高熵合金未来在工业应用中的挑战,并尝试为优化异质结构提高中/高熵合金综合性能提供可行的方法。
出处
《稀有金属材料与工程》
北大核心
2025年第3期640-664,共25页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(52261032,51861021,51661016)
Science and Technology Plan of Gansu Province(21YF5GA074)
Public Welfare Project of Zhejiang Natural Science Foundation(LGG22E010008)
Wenzhou Basic Public Welfare Scientific Research Project(G2023020)
Incubation Program of Excellent Doctoral Dissertation-Lanzhou University of Technology。
