一种低密度耐高温高比强度多层次结构双相高熵合金

作     者：李亚耸 廖卫兵 陈怀灿 Jamieson Brechtl 宋温丽 殷雯 何占兵 Peter K.Liaw 张勇 Yasong Li;Wei-Bing Liao;Huaican Chen;Jamieson Brechtl;Wenli Song;Wen Yin;Zhanbing He;Peter K.Liaw;Yong Zhang

作者机构：Beijing Advanced Innovation Center of Materials Genome EngineeringState Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Spallation Neutron Source Science CenterInstitute of High Energy PhysicsChinese Academy of SciencesDongguan 523803China Energy and Transportation Science DivisionOak RidgeTN37831USA Department of Materials Science and EngineeringThe University of TennesseeKnoxvilleTN37996USA Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceUniversity of Science and Technology BeijingBeijing 100083China Shunde Graduate School of University of Science and Technology BeijingFoshan 528399China 

基　　金：the supports from the Fundamental Research Funds for the Central Universities(FRF-MP-19-013) Guangdong Basic and Applied Basic Research Foundation(2019B1515120020) the State Key Laboratory for Advanced Metals and Materials,the University of Science and Technology Beijing(2020Z-08) the Funds for Creative Research Groups of China(51921001) the National Natural Science Foundation of China(51801128) Guangdong Basic and Applied Basic Research Foundation(2021A1515012278 and 2022A1515010288) the supports from the National Natural Science Foundation of China(51871015 and 52171151) the supports from the National Science Foundation(DMR-1611180 and 1809640) the US Army Research Office(W911NF13-1-0438 and W911NF-19-2-0049) 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2023年第66卷第2期

页      码：780-792页

摘      要：本文研究了一种新型低密度(~6.24 g cm^(-3))双相AlTiVCoNi高熵合金,其组织结构由有序L21高熵金属间化合物、无序体心立方结构和纳米L21相多层次结构构成.该合金在1200℃+24 h热处理下未发生相结构转变,在此条件下具有优异的高温相结构稳定性,其铸态和热处理态的压缩屈服强度相当,达到~1.6 GPa.另外,该合金在室温和600℃条件下表现出了优异的强塑性匹配和优异的比屈服强度,分别达到了约261和210 MPa g^(-1)cm^(3).该合金的超高强度主要源于有序L21相与体心立方相的半共格界面导致的一种强相结构稳定性和多层次结构的复合强化机制.该合金在800和1000℃压缩过程中出现了动态再结晶软化,使得其高温强度有所降低.这种“具有半共格界面L21+体心立方+纳米L21颗粒”的多层次结构设计为开发新型低密度耐高温高熵合金提供了一种新设计思路.

主 题 词：金属间化合物 高熵合金 体心立方 双相 多层次结构 高比强度 超高强度 高温强度 

学科分类：08[工学] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1007/s40843-022-2178-x

馆 藏 号：203115676...