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Enhancement of the strength-ductility relationship for carbon nanotube/Al-Cu-Mg nanocomposites by material parameter optimisation
Liu, Z. Y.1; Ma, K.1; Fan, G. H.2; Zhao, K.1; Zhang, J. F.1; Xiao, B. L.1; Ma, Z. Y.1
Corresponding AuthorXiao, B. L.(blxiao@imr.ac.cn) ; Ma, Z. Y.(zyma@imr.ac.cn)
2020-02-01
Source PublicationCARBON
ISSN0008-6223
Volume157Pages:602-613
AbstractHeterogeneous carbon nanotube (CNT)/Al-Cu-Mg composites, consisting of CNT-free coarse grain (CG) bands and CNT-rich ultrafine grain (UFG) zones, were fabricated to significantly enhance their strength-ductility. Their mechanical behavior as well as extra-strengthening and elongation increase mechanisms were investigated in detail, with the help of high-resolution digital image correlation (DIC) and extended finite element method (XFEM). A narrow CG band and medium CG content were found to be beneficial in increasing the strength-ductility. Under optimized conditions, a heterogeneous 3 vol% CNT/Al composite exhibited more than 100% elongation increase with nearly no ultimate tensile strength loss as compared to the uniform composite. Geometrically necessary dislocations were induced between the CG and UFG zones, leading to extra-strengthening beyond the rule-of-mixtures. Local strain and micro-crack propagation analyses based on DIC and XFEM indicated that strain localization was greatly suppressed and micro-cracks were effectively blunted because of the existence of CG bands, leading to considerably enhanced elongation. Finally, a model was proposed to assist the selection of the heterogeneous structure parameters for the strength-ductility design of the nanocomposite. The calculated safety zones for CG parameter selection were in well agreement with the experimental results. (C) 2019 Elsevier Ltd. All rights reserved.
Funding OrganizationKey Research Program of Frontier Sciences, CAS ; National Key R&D Program of China ; National Natural Science Foundation of China
DOI10.1016/j.carbon.2019.10.080
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[51931009] ; National Natural Science Foundation of China[51871215]
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000502548500068
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136283
Collection中国科学院金属研究所
Corresponding AuthorXiao, B. L.; Ma, Z. Y.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
2.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
Recommended Citation
GB/T 7714
Liu, Z. Y.,Ma, K.,Fan, G. H.,et al. Enhancement of the strength-ductility relationship for carbon nanotube/Al-Cu-Mg nanocomposites by material parameter optimisation[J]. CARBON,2020,157:602-613.
APA Liu, Z. Y..,Ma, K..,Fan, G. H..,Zhao, K..,Zhang, J. F..,...&Ma, Z. Y..(2020).Enhancement of the strength-ductility relationship for carbon nanotube/Al-Cu-Mg nanocomposites by material parameter optimisation.CARBON,157,602-613.
MLA Liu, Z. Y.,et al."Enhancement of the strength-ductility relationship for carbon nanotube/Al-Cu-Mg nanocomposites by material parameter optimisation".CARBON 157(2020):602-613.
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