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Eutectic high entropy alloy syntactic foam

文献类型：期刊论文

作者Meng J(孟锦); Qiao Y(乔宇); Liu TW(刘天威); Tan YY(谭园园); Cao FH(曹富华); Chen Y(陈艳); Wang HY(汪海英); Dai LH(戴兰宏)
刊名JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
出版日期2023-06-20
卷号149页码:177-189
ISSN号1005-0302
关键词Eutectic high entropy alloy Foams Metal matrix composites (MMCs) Energy absorption
DOI10.1016/j.jmst.2022.12.009
英文摘要High strength metallic foams have a wide range of applications in engineering as lightweight structural and energy absorbing materials. However, it is challenging to obtain metallic foam with both good energy absorption performance and high strength. Here, we developed a novel metal matrix syntactic foam fabri cated with AlCoCrFeNi2.1 eutectic high entropy alloy and alumina cenospheres that exhibits a remarkable combination of high strength and energy absorption performance under both quasi static and dynamic compression. The porous structure of syntactic foam fully exploits the properties of the AlCoCrFeNi2.1 alloy matrix with a unique FCC/B2 dual phase eutectic microstructure and thus yields exceptional per formance. We discovered that this dual phase microstructure not only provides high strength but also allows the pores to collapse in a progressive and diffusive way, which enables the formation of a high and smooth energy absorption platform. It is found that the heterogeneity between the two phases in the matrix can provide back stress strengthening, and it also induces multiple micro shear bands and microcracks as additional energy dissipation modes as the deformation proceeds. This unique mechanism ensures the strength of microstructures and makes them fracture promptly, which causes the balance of strengthening and softening on the macro scale. This work opens the avenue for developing advanced high strength lightweight structural and energy absorbing materials.(c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
分类号一类
WOS研究方向Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000949768900001
资助机构NSFC [11972346, 11672316, U2141204] ; Key Research Program of the Chinese Academy of Sciences [XDB22040302] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040303, 11988102] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; [ZDRW CN 2021 2 3] ; [11790292]
其他责任者Dai, LH (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
源URL[http://dspace.imech.ac.cn/handle/311007/91852]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
3.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China
推荐引用方式
GB/T 7714		 Meng J,Qiao Y,Liu TW,et al. Eutectic high entropy alloy syntactic foam[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,149:177-189.
APA 孟锦.,乔宇.,刘天威.,谭园园.,曹富华.,...&戴兰宏.(2023).Eutectic high entropy alloy syntactic foam.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,149,177-189.
MLA 孟锦,et al."Eutectic high entropy alloy syntactic foam".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 149(2023):177-189.

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来源：力学研究所

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