Cyclic strain amplitude-dependent fatigue mechanism of gradient nanograined Cu

doi:10.1016/j.actamat.2020.06.047

CORC > 金属研究所 > 中国科学院金属研究所

	Cyclic strain amplitude-dependent fatigue mechanism of gradient nanograined Cu
	Pan, Q. S.; Long, J. Z.; Jing, L. J.; Tao, N. R.; Lu, L.
刊名	ACTA MATERIALIA
	2020-09-01
卷号	196 页码:252-260
关键词	Gradient nanograin (GNG) Cyclic response Grain coarsening Strain delocalization Fatigue mechanism
ISSN号	1359-6454
DOI	10.1016/j.actamat.2020.06.047
通讯作者	Lu, L.(llu@imr.ac.cn)
英文摘要	Different grain coarsening behaviors (i.e. abnormal and homogeneous) are prevalently observed in gradient nanograined (GNG) Cu under stress controlled high-cycle and strain controlled low-cycle fatigue tests, respectively. In this paper, to comprehensively understand the intrinsic fatigue mechanism of gradient nanograined structures, both high and low cycle fatigue behaviors of GNG Cu are investigated under strain-controlled fatigue tests with a wide strain amplitude ranges. Cyclic behavior transition from abnormal grain coarsening at small strain amplitude to homogeneous grain coarsening at large strain amplitude is observd in GNG Cu. Microstrucural analysis reveals that the grain coarsening behavior in either abnormal or normal (homogeneous) mode is closely related to the spatial distribution of the cyclic plastic strain in the GNG layer (localized or delocalized) under cyclic loading. Such unique cyclic strain amplitude-dependent fatigue behavior is inherent to the gradient nanostructure, which fundamentally differs from the conventional strain localizing mechanism in metals with homogeneous structures under cyclic loading. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目	National Science Foundation of China (NSFC)[U1608257] ; National Science Foundation of China (NSFC)[51931010] ; Key Research Program of Frontier Science, CAS[GJHZ2029] ; International partnership program, CAS[GJHZ2029] ; LiaoNing Revitalization Talents Program[XLYC1802026] ; NSFC[51601196] ; Youth Innovation Promotion Association CAS[2019196]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000557651000024
资助机构	National Science Foundation of China (NSFC) ; Key Research Program of Frontier Science, CAS ; International partnership program, CAS ; LiaoNing Revitalization Talents Program ; NSFC ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140210]
专题	金属研究所_中国科学院金属研究所
通讯作者	Lu, L.
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Pan, Q. S.,Long, J. Z.,Jing, L. J.,et al. Cyclic strain amplitude-dependent fatigue mechanism of gradient nanograined Cu[J]. ACTA MATERIALIA,2020,196:252-260.
APA	Pan, Q. S.,Long, J. Z.,Jing, L. J.,Tao, N. R.,&Lu, L..(2020).Cyclic strain amplitude-dependent fatigue mechanism of gradient nanograined Cu.ACTA MATERIALIA,196,252-260.
MLA	Pan, Q. S.,et al."Cyclic strain amplitude-dependent fatigue mechanism of gradient nanograined Cu".ACTA MATERIALIA 196(2020):252-260.