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Structure optimization for improving the strength and ductility of heterogeneous carbon nanotube/Al-Cu-Mg composites
Ma, K.1,2,3; Liu, Z. Y.1; Liu, K.3; Chen, X. Grant3; Xiao, B. L.1; Ma, Z. Y.1
Corresponding AuthorLiu, Z. Y.(zyliu@imr.ac.cn) ; Xiao, B. L.(blxiao@imr.ac.cn)
2021-06-30
Source PublicationCARBON
ISSN0008-6223
Volume178Pages:190-201
AbstractHeterogeneous carbon nanotube (CNT)/Al-Cu-Mg composites, consisting of ductile zones (DZs) free of CNTs and brittle zones (BZs) rich of CNTs, were fabricated in powder metallurgy route. It was shown that the grain size and width of the DZs in the heterogeneous composites could be controlled by high energy ball milling (HEBM) on additional Al-Cu-Mg alloy powders. Appropriate grain refinement in the DZs and a medium DZ width were identified to be beneficial for improving the strength-ductility. Under the optimized condition, a heterogeneous CNT/Al-Cu-Mg composite exhibited 88% increase in the elongation and 2% increase in the tensile strength compared to the uniform composite. Although the yield strength of the heterogeneous composite was lower than that of the uniform composite, the appropriate grain refinement in the DZs was good for alleviating the low yield phenomenon. Furthermore, the abundant grain boundaries could reduce the local slip bands passing through the DZs, which could significantly relax the stress concentration of the BZs. As a result, the medium width DZs could contribute more to the plastic deformation, thereby further improving the strength-ductility. Finally, a model was proposed to assist the design of the heterogeneous structure parameters. The calculated optimized DZ size was in accordance with the DZ width of the heterogeneous composite with the best strength-ductility. (C) 2021 Elsevier Ltd. All rights reserved.
KeywordCarbon nanotube Al matrix composite Heterogeneous Mechanical property
Funding OrganizationKey Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Key R&D Program of China ; Youth Innovation Promotion Association CAS ; China Scholarship Council
DOI10.1016/j.carbon.2021.03.006
Indexed BySCI
Language英语
Funding ProjectKey Research Program of Frontier Sciences, CAS[QYZDJ-SSW-JSC015] ; National Natural Science Foundation of China[51931009] ; National Natural Science Foundation of China[51871214] ; National Natural Science Foundation of China[51871215] ; National Key R&D Program of China[2017YFB0703104] ; Youth Innovation Promotion Association CAS[2020197] ; China Scholarship Council
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000648729800018
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/321006/160781
Collection中国科学院金属研究所
Corresponding AuthorLiu, Z. Y.; Xiao, B. L.
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Univ Quebec Chicoutimi, Dept Appl Sci, Saguenay, PQ G7H 2B1, Canada
Recommended Citation
GB/T 7714
Ma, K.,Liu, Z. Y.,Liu, K.,et al. Structure optimization for improving the strength and ductility of heterogeneous carbon nanotube/Al-Cu-Mg composites[J]. CARBON,2021,178:190-201.
APA Ma, K.,Liu, Z. Y.,Liu, K.,Chen, X. Grant,Xiao, B. L.,&Ma, Z. Y..(2021).Structure optimization for improving the strength and ductility of heterogeneous carbon nanotube/Al-Cu-Mg composites.CARBON,178,190-201.
MLA Ma, K.,et al."Structure optimization for improving the strength and ductility of heterogeneous carbon nanotube/Al-Cu-Mg composites".CARBON 178(2021):190-201.
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