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Ultrahigh strength and ductility in newly developed materials with coherent nanolamellar architectures
Fan, Lei1; Yang, Tao2; Zhao, Yilu2; Luan, Junhua2; Zhou, Gang3; Wang, Hao3; Jiao, Zengbao1; Liu, Chain-Tsuan2
Corresponding AuthorJiao, Zengbao(zb.jiao@polyu.edu.hk) ; Liu, Chain-Tsuan(chainliu@cityu.edu.hk)
2020-12-07
Source PublicationNATURE COMMUNICATIONS
ISSN2041-1723
Volume11Issue:1Pages:8
AbstractNano-lamellar materials with ultrahigh strengths and unusual physical properties are of technological importance for structural applications. However, these materials generally suffer from low tensile ductility, which severely limits their practical utility. Here we show that markedly enhanced tensile ductility can be achieved in coherent nano-lamellar alloys, which exhibit an unprecedented combination of over 2GPa yield strength and 16% uniform tensile ductility. The ultrahigh strength originates mainly from the lamellar boundary strengthening, whereas the large ductility correlates to a progressive work-hardening mechanism regulated by the unique nano-lamellar architecture. The coherent lamellar boundaries facilitate the dislocation transmission, which eliminates the stress concentrations at the boundaries. Meanwhile, deformation-induced hierarchical stacking-fault networks and associated high-density Lomer-Cottrell locks enhance the work hardening response, leading to unusually large tensile ductilities. The coherent nano-lamellar strategy can potentially be applied to many other alloys and open new avenues for designing ultrastrong yet ductile materials for technological applications. Nano-lamellar materials with ultrahigh strengths are highly desirable for technological applications. Here the authors report a nanolamellar architecturing approach by utilizing coherent L12 structures to achieve ultrahigh strength and ductility in Ni-Fe-Co-Cr-Al-Ti multicomponent alloys.
Funding OrganizationEarly Career Scheme from the Research Grants Council (RGC) of Hong Kong ; National Natural Science Foundation of China ; internal research fund from PolyU ; Hong Kong RGC
DOI10.1038/s41467-020-20109-z
Indexed BySCI
Language英语
Funding ProjectEarly Career Scheme from the Research Grants Council (RGC) of Hong Kong[25202719] ; National Natural Science Foundation of China[51801169] ; internal research fund from PolyU[P0009738] ; internal research fund from PolyU[P0013994] ; Hong Kong RGC[11213319] ; Hong Kong RGC[11202718]
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000598906000003
PublisherNATURE RESEARCH
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/158869
Collection中国科学院金属研究所
Corresponding AuthorJiao, Zengbao; Liu, Chain-Tsuan
Affiliation1.Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Peoples R China
2.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China
3.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Fan, Lei,Yang, Tao,Zhao, Yilu,et al. Ultrahigh strength and ductility in newly developed materials with coherent nanolamellar architectures[J]. NATURE COMMUNICATIONS,2020,11(1):8.
APA Fan, Lei.,Yang, Tao.,Zhao, Yilu.,Luan, Junhua.,Zhou, Gang.,...&Liu, Chain-Tsuan.(2020).Ultrahigh strength and ductility in newly developed materials with coherent nanolamellar architectures.NATURE COMMUNICATIONS,11(1),8.
MLA Fan, Lei,et al."Ultrahigh strength and ductility in newly developed materials with coherent nanolamellar architectures".NATURE COMMUNICATIONS 11.1(2020):8.
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