气候变化领域集成服务门户(CCPortal): Ultrahigh-strength and ductile superlattice alloys with nanoscale disordered interfaces

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DOI	10.1126/science.abb6830
	Ultrahigh-strength and ductile superlattice alloys with nanoscale disordered interfaces
	Yang T.; Zhao Y.L.; Li W.P.; Yu C.Y.; Luan J.H.; Lin D.Y.; Fan L.; Jiao Z.B.; Liu W.H.; Liu X.J.; Kai J.J.; Huang J.C.; Liu C.T.
发表日期	2020
ISSN	0036-8075
起始页码	427
结束页码	432
卷号	369 期号:6502
英文摘要	Alloys that have high strengths at high temperatures are crucial for a variety of important industries including aerospace. Alloys with ordered superlattice structures are attractive for this purpose but generally suffer from poor ductility and rapid grain coarsening. We discovered that nanoscale disordered interfaces can effectively overcome these problems. Interfacial disordering is driven by multielement cosegregation that creates a distinctive nanolayer between adjacent micrometer-scale superlattice grains. This nanolayer acts as a sustainable ductilizing source, which prevents brittle intergranular fractures by enhancing dislocation mobilities. Our superlattice materials have ultrahigh strengths of 1.6 gigapascals with tensile ductilities of 25% at ambient temperature. Simultaneously, we achieved negligible grain coarsening with exceptional softening resistance at elevated temperatures. Designing similar nanolayers may open a pathway for further optimization of alloy properties. © 2020 American Association for the Advancement of Science. All rights reserved.
英文关键词	alloy; boron; cobalt; iron; superlattice alloy; unclassified drug; alloy; ductility; high temperature; nanotechnology; optimization; strength; Article; breaking strength; density functional theory; hardness; high temperature; priority journal; tensile strength; thermostability
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246096
作者单位	Department of Mechanical Engineering, City University of Hong Kong, Hong Kong; Hong Kong Institute for Advanced Study, City University of Hong Kong, Hong Kong; Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, China; Software Center for High Performance Numerical Simulation, Institute of Applied Physics and Computational Mathematics, Chinese Academy of Engineering Physics, Beijing, China; Department of Mechanical Engineering, Hong Kong Polytechnic University, Hong Kong; School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, China; Institute of Materials Genome and Big Data, Harbin Institute of Technology, Shenzhen, China
推荐引用方式 GB/T 7714	Yang T.,Zhao Y.L.,Li W.P.,et al. Ultrahigh-strength and ductile superlattice alloys with nanoscale disordered interfaces[J],2020,369(6502).
APA	Yang T..,Zhao Y.L..,Li W.P..,Yu C.Y..,Luan J.H..,...&Liu C.T..(2020).Ultrahigh-strength and ductile superlattice alloys with nanoscale disordered interfaces.Science,369(6502).
MLA	Yang T.,et al."Ultrahigh-strength and ductile superlattice alloys with nanoscale disordered interfaces".Science 369.6502(2020).