High-entropy alloy: challenges and prospects
High-entropy alloy: challenges and prospects
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DOI：
10.1016/j.mattod.2015.11.026
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发表时间：
2016-07-01
期刊：
影响因子：
24.2
通讯作者：
Yang, Y.
中科院分区：
文献类型：
--
作者：
Ye, Y. F.;Wang, Q.;Yang, Y.
高熵合金是当前材料科学和工程领域的研究热点。与传统合金不同的是，HEA只包含一种基本元素，很少包含两种基本元素，HEA由多个主要元素组成，HEA成分的可能数量比传统合金多得多。随着HEAS的出现，对传统合金提出的理论、模型和方法提出挑战的基本问题也出现了。在这里，我们提供了一个批判性的回顾最近的研究，旨在解决有关的基本问题的相形成在HEA。此外，还讨论了HEAs的新性能，如优异的比强度、优异的高温力学性能、优异的低温延性和断裂韧性、超顺磁性和超导电性。由于其巨大的结构和功能潜力以及丰富的设计，家用电器在新的应用领域具有广阔的前景，值得进一步研究。
High-entropy alloys (HEAs) are presently of great research interest in materials science and engineering. Unlike conventional alloys, which contain one and rarely two base elements, HEAs comprise multiple principal elements, with the possible number of HEA compositions extending considerably more than conventional alloys. With the advent of HEAs, fundamental issues that challenge the proposed theories, models, and methods for conventional alloys also emerge. Here, we provide a critical review of the recent studies aiming to address the fundamental issues related to phase formation in HEAs. In addition, novel properties of HEAs are also discussed, such as their excellent specific strength, superior mechanical performance at high temperatures, exceptional ductility and fracture toughness at cryogenic temperatures, superparamagnetism, and superconductivity. Due to their considerable structural and functional potential as well as richness of design, HEAs are promising candidates for new applications, which warrants further studies.