V Balaji, M Anthony Xavior
School of Mechanical Engineering, Vellore Institute of Technology, Vellore 632 014, Tamil Nadu, India.
Heliyon. 2024 Feb 19;10(7):e26464. doi: 10.1016/j.heliyon.2024.e26464. eCollection 2024 Apr 15.
A novel concept of developing multi-principal elements, or compositional complex alloys is referred as high-entropy alloys (HEAs). This review addresses the role of entropy in alloying additions along with the effect of various elements listed in the periodic table in forming the HEAs. Phase formation rules and the associated parameters along with their significance are discussed. The physical metallurgy technique is elaborated with reference to the high-entropy effect, severe lattice distortion effect, sluggish diffusion effect, and cocktail effects. Various types of HEAs such as light weight HEAs, nanoprecipitate HEAs, ultrafine-grained HEAs, dual-phase HEAS and TRIP/TWIN HEAs are discussed. Further, the effects of mechanical alloying in HEAs are presented. Finally, the microstructural effects and mechanical properties of HEAs are addressed with reference to the published literature.
开发多主元或成分复杂合金的一种新观念被称为高熵合金（HEAs）。本综述阐述了熵在合金添加中的作用，以及元素周期表中各种元素在形成高熵合金时的影响。讨论了相形成规则及其相关参数以及它们的重要性。结合高熵效应、严重晶格畸变效应、扩散迟缓效应和混合效应阐述了物理冶金技术。讨论了各种类型的高熵合金，如轻质高熵合金、纳米析出相高熵合金、超细晶粒高熵合金、双相高熵合金以及相变诱发塑性/孪生高熵合金。此外，还介绍了机械合金化在高熵合金中的作用。最后，参考已发表的文献探讨了高熵合金的微观结构效应和力学性能。
