增材制造FeCoNiAl系高熵合金的研究进展  

Review of Additive Manufactured FeCoNiAl-based High-Entropy Alloys

作　　者：孙沁瑶 杜大帆 董安平[1] 赵凯 陈彪 孙宝德[1] SUN Qinyao;DU Dafan;DONG Anping;ZHAO Kai;CHEN Biao;SUN Baode(Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming and State Key Lab of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Aerospace Equipment Manufacturer Co.,Ltd.,Shanghai 200245,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]上海交通大学上海市先进高温材料及其精密成形重点实验室及上海交通大学金属基复合材料国家重点实验室,上海200240 [2]上海航天设备制造总厂有限公司,上海200245 [3]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《铸造技术》2024年第3期208-227,共20页Foundry Technology

基　　金：国家自然科学基金(52071205,52101089,51821001);凝固技术国家重点实验室开放课题(SKLSP202214);航天八院-上海交大联合基金(USCAST2022-25)。

摘　　要：FeCoNiAl系高熵合金在面心立方的FeCoNi基体中引入体心立方相稳定元素Al及其他合金化元素,因此表现出独特的显微组织、力学性能和功能性,具有广阔的工业应用前景。近年来,增材制造技术为制造超细晶粒和几何复杂的高熵合金零件提供了技术支持,引起研究人员的广泛关注。本文从打印工艺、显微结构、性能、缺陷和后处理等方面综述了增材制造FeCoNiAl系高熵合金的新进展。系统总结了几种典型增材制造技术,并讨论不同工艺下FeCoNiAl系高熵合金的晶体结构、显微组织及其相应的性能,阐述增材制造过程中与快速凝固和复杂热循环有关的缺陷形成机制。此外,介绍并总结了几种旨在进一步提高FeCoNiAl系高熵合金性能的后处理方法。最后,展望了增材制造高熵合金未来的研究方向,以解决面临的挑战,加快其在工业领域的应用。FeCoNiAl-based high-entropy alloys(HEAs)are designed by introducing the BCC phase stabilizing element Al as well as other alloying elements into the FCC-FeCoNi matrix,thus exhibiting unique microstructures,mechanical properties,and functional performances,making them promising for a wide range of industrial applications.In recent years,additive manufacturing technology has provided technical support for manufacturing complex HEAs components with ultrafine grains,which has attracted extensive attention.This paper reviews the latest progress in additive manufacturing of FeCoNiAl-based HEAs from the aspects of printing processes,microstructures,performance,defects,and post-processing.Various typical additive manufacturing techniques are systematically summarized,the crystal structures,microstructures and corresponding properties of FeCoNiAl-based HEAs under different processes are discussed,and the mechanisms of defect formation related to rapid solidification and thermal cycles during the additive manufacturing process are elucidated.Additionally,several post-processing methods for improving the performance of FeCoNiAl-based HEAs have been introduced.Finally,future research directions in additive manufacturing of high-entropy alloys are outlined to address the current challenges and accelerate their industrial application.

关 键 词：增材制造 FeCoNiAl系高熵合金 相转变 性能 后处理 

分 类 号：TG139[一般工业技术—材料科学与工程]