高熵合金腐蚀行为研究进展-中国材料进展

文章信息/Info

作者:: 马艺; 杜晓懿; 王明亮; 曹志强; 王同敏; 李廷举; 卢一平; 1.大连理工大学材料科学与工程学院，辽宁大连 116024 2.大连理工大学辽宁省高熵合金材料工程研究中心，辽宁大连 116024

Author(s):: Ma Yi; Du Xiaoyi; Wang Mingliang; Cao zhiqiang; Wang tongmin; Li tingju; Lu Yiping; 1. School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China 2. Engineering Research Center of High-Entropy Alloy Materials, Dalian 116024, China

Keywords:: high-entropy alloy; composition design; corrosion resistance; passive film; corrosion mechanism

摘要:: 高熵合金独特的成分设计和多组元间协同作用，赋予了其许多特殊的物理、化学和力学性能，如在多种腐蚀介质中展现出优于传统合金的耐腐蚀性，在现代工业和高技术领域展现出巨大的应用潜力。从高熵合金成分、制备方法和热机械处理工艺对其晶粒尺寸、元素分布、相结构、晶体缺陷的影响出发，阐明了在多种腐蚀介质中高熵合金表面钝化膜组成成分、形成过程和稳定性的差异化原因，进一步对腐蚀发生的具体形式、腐蚀产物和腐蚀机理进行梳理，准确评估了高熵合金的腐蚀性能。最后，对突破传统合金的应用限制，解决极端服役环境下的“卡脖子”难题，开发高强塑耐腐蚀高熵合金，推进高熵合金新材料工业化应用过程中面临的挑战进行了总结与展望。

Abstract:: The unique composition design and interaction among multi-component elements of high-entropy alloys (HEAs) make HEAs possess many special physical, chemical and mechanical properties, such as better corrosion resistance than traditional alloys in various corrosive media, HEAs show great application potential in modern industry and high-tech fields. In this review, we start with the influence of HEAs composition, preparation method, and thermomechanical treatment process on grain size, element distribution, phase structure, and crystal defects. Then, we clarify the reasons for the difference between composition, formation process, and stability of passive film on HEAs in corrosive media. Furthermore, we sort out the corrosion form, corrosion product, and corrosion mechanism, in order to accurately evaluate the corrosion resistance of HEAs. Finally, the challenges faced in the process of breaking the application limitations of traditional alloys, overcoming the “technology choke points” problem in extreme service environments,developing high-strength, ductility, and corrosion-resistant high-entropy alloys, and promoting the industrial application of HEAs are summarized and prospected