Complementary nanodomain structures in topologically close-packed precipitates of Al-Zn-Mg-Cu alloy

doi:10.1016/j.matchar.2024.114005

IMR OpenIR

	Complementary nanodomain structures in topologically close-packed precipitates of Al-Zn-Mg-Cu alloy
	Zhang, Yongchao 1,2; Duan, Huichao 1; Zheng, Tao 1,3; Chen, Chunjin 1,3; Song, Miao 1,4; Zeng, Panlin 1,3; Ye, Hengqiang 5; Du, Kui 1
通讯作者	Duan, Huichao(hcduan15s@imr.ac.cn) ; Du, Kui(kuidu@imr.ac.cn)
	2024-06-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	212 页码:10
摘要	High-strength aluminium alloys attract continuous research interest, owing to their wide use in aerospace and terrestrial transportation industries. The performance of the alloys is essentially determined by nanoscale precipitates, thus understanding the structure and formation mechanism of the precipitates during thermal processing is of great importance. Here, we reveal complementary domain structures in precipitates in a highstrength Al-Zn-Mg-Cu alloy using a combination of aberration-corrected high-angle annular dark-field scanning transmission electron microscopy and energy dispersive X-ray spectroscopy. Through the transfer of fivefold symmetry polyhedra at domain boundaries, the intermediate precipitates develop two sets of highly ordered and structurally complementary nanoscale domains in their nucleation and growth. This new type of atom packing maintains the topologically close-packed structure inside the precipitates while reducing the lattice misfit with the Al matrix and the barrier of structural transformations on two interfaces, demonstrating good thermal stability. Our discoveries lead to insight into the precipitate evolution in the Al-Zn-Mg-Cu alloy system and can help understand other precipitation processes of complex structured phases. Furthermore, the evolution process demonstrates an advanced mode of building metastable architectures with nanoscale interlocking pieces in alloy matrixes, which may inspire strategies to obtain high-strength, lightweight and thermostable alloys.
关键词	Aberration corrected transmission electron microscopy Domain structure Precipitation Al alloys
资助者	Guangxi Key Research and Devel- opment Plan ; National Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province
DOI	10.1016/j.matchar.2024.114005
收录类别	SCI
语种	英语
资助项目	Guangxi Key Research and Devel- opment Plan[AA23023030] ; National Natural Science Foundation of China[91960202] ; National Natural Science Foundation of China[52101002] ; National Natural Science Foundation of China[52171020] ; National Natural Science Foundation of China[51901229] ; Natural Science Foundation of Liaoning Province[2023 -BS -010]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001245340100001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/187050
专题	中国科学院金属研究所
通讯作者	Duan, Huichao; Du, Kui
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Anhui Univ, Informat Mat & Intelligent Sensing Lab Anhui Prov, Key Lab Struct & Funct Regulat Hybrid Mat, Inst Phys Sci & Informat Technol,Minist Educ, Hefei 230601, Anhui, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Cent South Univ, Powder Met Res Inst, Changsha 410083, Hunan, Peoples R China 5.Jihua Lab, Foshan 528251, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yongchao,Duan, Huichao,Zheng, Tao,et al. Complementary nanodomain structures in topologically close-packed precipitates of Al-Zn-Mg-Cu alloy[J]. MATERIALS CHARACTERIZATION,2024,212:10.
APA	Zhang, Yongchao.,Duan, Huichao.,Zheng, Tao.,Chen, Chunjin.,Song, Miao.,...&Du, Kui.(2024).Complementary nanodomain structures in topologically close-packed precipitates of Al-Zn-Mg-Cu alloy.MATERIALS CHARACTERIZATION,212,10.
MLA	Zhang, Yongchao,et al."Complementary nanodomain structures in topologically close-packed precipitates of Al-Zn-Mg-Cu alloy".MATERIALS CHARACTERIZATION 212(2024):10.