Inhibiting creep in nanograined alloys with stable grain boundary networks

doi:10.1126/science.abq7739

IMR OpenIR

	Inhibiting creep in nanograined alloys with stable grain boundary networks
	Zhang, B. B.1; Tang, Y. G.1,2; Mei, Q. S.3; Li, X. Y.1; Lu, K.1,4
通讯作者	Li, X. Y.(xyli@imr.ac.cn) ; Lu, K.(lu@imr.ac.cn)
	2022-11-11
发表期刊	SCIENCE
ISSN	0036-8075
卷号	378 期号:6620 页码:659-663
摘要	Creep, the time-dependent deformation of materials stressed below the yield strength, is responsible for a great number of component failures at high temperatures. Because grain boundaries (GBs) in materials usually facilitate diffusional processes in creep, eliminating GBs is a primary approach to resisting high-temperature creep in metals, such as in single-crystal superalloy turbo blades. We report a different strategy to inhibiting creep by use of stable GB networks. Plastic deformation triggered structural relaxation of high-density GBs in nanograined single-phased nickel-cobalt-chromium alloys, forming networks of stable GBs interlocked with abundant twin boundaries. The stable GB networks effectively inhibit diffusional creep processes at high temperatures. We obtained an unprecedented creep resistance, with creep rates of similar to 10(-7) per second under gigapascal stress at 700 degrees C (similar to 61% melting point), outperforming that of conventional superalloys.
资助者	Ministry of Science and Technology of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences
DOI	10.1126/science.abq7739
收录类别	SCI
语种	英语
资助项目	Ministry of Science and Technology of China[2017YFA0700700] ; Ministry of Science and Technology of China[2017YFA0204401] ; National Natural Science Foundation of China[51901226] ; Chinese Academy of Sciences
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000898883700015
出版者	AMER ASSOC ADVANCEMENT SCIENCE
引用统计	被引频次：33[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/321006/175827
专题	中国科学院金属研究所
通讯作者	Li, X. Y.; Lu, K.
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Peoples R China 4.Liaoning Acad Mat, Shenyang 110004, Peoples R China
推荐引用方式 GB/T 7714	Zhang, B. B.,Tang, Y. G.,Mei, Q. S.,et al. Inhibiting creep in nanograined alloys with stable grain boundary networks[J]. SCIENCE,2022,378(6620):659-663.
APA	Zhang, B. B.,Tang, Y. G.,Mei, Q. S.,Li, X. Y.,&Lu, K..(2022).Inhibiting creep in nanograined alloys with stable grain boundary networks.SCIENCE,378(6620),659-663.
MLA	Zhang, B. B.,et al."Inhibiting creep in nanograined alloys with stable grain boundary networks".SCIENCE 378.6620(2022):659-663.