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Different fatigue behavior between tension-tension and tension-compression of carbon nanotubes reinforced 7055 Al composite with bimodal structure
Bi, S.1,2; Liu, Z. Y.1; Xiao, B. L.1; Xue, P.1; Wang, D.1; Wang, Q. Z.1; Ni, D. R.1; Ma, Z. Y.1
Corresponding AuthorLiu, Z. Y.(zyliu@imr.ac.cn)
2021-10-30
Source PublicationCARBON
ISSN0008-6223
Volume184Pages:364-374
AbstractUnderstanding the fatigue behavior of Carbon nanotube (CNT) reinforced Al composites (CNT/Al) was of critical importance, for their further application in the aerospace industry. Although CNT could improve the fatigue performance, the fatigue behavior of CNT/Al composites with different structure (e.g. bimodal structure) under different fatigue conditions was still in lacking. In this study, the tension-tension/tension-compression fatigue behaviors of bimodal structure CNT/7055Al composites consisting of ultra-fine grain (UFG) zones rich of CNTs and coarse grain (CG) bands free of CNTs, were investigated and the corresponding damage mechanisms were analyzed. Results indicated that dislocation cells, tangles and subgrains were observed in the CGs, while no obvious dislocation configuration was detected in the UFGs after 107 fatigue cycles. Under the tension-tension fatigue condition, the fatigue strength of the composites was increased from 350 MPa to 400 MPa by load transfer effect of CNTs at 107 cycles. However, CNTs failed to improve the fatigue strength under the tension-compression fatigue condition due to the failure of the UFG zones rich of CNTs resulting from the high stress amplitude. It was found that strain localization in the CGs was the principal damage mechanism of CNT/7055Al composites. (C) 2021 Elsevier Ltd. All rights reserved.
KeywordCarbon nanotube Aluminum matrix composites Bimodal structure Fatigue Tension-tension Tension-compression
Funding OrganizationKey Research Program of Frontier Sciences, CAS ; National Key R&D Program of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
DOI10.1016/j.carbon.2021.08.034
Indexed BySCI
Language英语
Funding ProjectKey Research Program of Frontier Sciences, CAS[QYZDJ-SSW-JSC015] ; National Key R&D Program of China[2017YFB0703104] ; National Natural Science Foundation of China[51871215] ; National Natural Science Foundation of China[51931009] ; National Natural Science Foundation of China[51871214] ; Youth Innovation Promotion Association CAS[2020197]
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000703614300013
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/166749
Collection中国科学院金属研究所
Corresponding AuthorLiu, Z. Y.
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Bi, S.,Liu, Z. Y.,Xiao, B. L.,et al. Different fatigue behavior between tension-tension and tension-compression of carbon nanotubes reinforced 7055 Al composite with bimodal structure[J]. CARBON,2021,184:364-374.
APA Bi, S..,Liu, Z. Y..,Xiao, B. L..,Xue, P..,Wang, D..,...&Ma, Z. Y..(2021).Different fatigue behavior between tension-tension and tension-compression of carbon nanotubes reinforced 7055 Al composite with bimodal structure.CARBON,184,364-374.
MLA Bi, S.,et al."Different fatigue behavior between tension-tension and tension-compression of carbon nanotubes reinforced 7055 Al composite with bimodal structure".CARBON 184(2021):364-374.
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