IMR OpenIR
Cyclic strain amplitude-dependent fatigue mechanism of gradient nanograined Cu
Pan, Q. S.; Long, J. Z.; Jing, L. J.; Tao, N. R.; Lu, L.
Corresponding AuthorLu, L.(llu@imr.ac.cn)
2020-09-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume196Pages:252-260
AbstractDifferent 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.
KeywordGradient nanograin (GNG) Cyclic response Grain coarsening Strain delocalization Fatigue mechanism
Funding OrganizationNational 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
DOI10.1016/j.actamat.2020.06.047
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000557651000024
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140214
Collection中国科学院金属研究所
Corresponding AuthorLu, L.
AffiliationChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
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.
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