Ultrahigh strength and ductility in newly developed materials with coherent nanolamellar architectures

doi:10.1038/s41467-020-20109-z

CORC > 金属研究所 > 中国科学院金属研究所

	Ultrahigh strength and ductility in newly developed materials with coherent nanolamellar architectures
	Fan, Lei 1; Yang, Tao 2; Zhao, Yilu 2; Luan, Junhua 2; Zhou, Gang 3; Wang, Hao 3; Jiao, Zengbao 1; Liu, Chain-Tsuan 2
刊名	NATURE COMMUNICATIONS
	2020-12-07
卷号	11 期号:1 页码:8
ISSN号	2041-1723
DOI	10.1038/s41467-020-20109-z
通讯作者	Jiao, Zengbao(zb.jiao@polyu.edu.hk) ; Liu, Chain-Tsuan(chainliu@cityu.edu.hk)
英文摘要	Nano-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.
资助项目	Early 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研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE RESEARCH
WOS记录号	WOS:000598906000003
资助机构	Early 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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/158868]
专题	金属研究所_中国科学院金属研究所
通讯作者	Jiao, Zengbao; Liu, Chain-Tsuan
作者单位	1.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
推荐引用方式 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.