| 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 Author | Xiao, B. L.(blxiao@imr.ac.cn) ; Ma, Z. Y.(zyma@imr.ac.cn) |
| 2020-02-01 | |
| Source Publication | CARBON
 |
| ISSN | 0008-6223 |
| Volume | 157Pages:602-613 |
| Abstract | Heterogeneous 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 Organization | Key Research Program of Frontier Sciences, CAS ; National Key R&D Program of China ; National Natural Science Foundation of China |
| DOI | 10.1016/j.carbon.2019.10.080 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Key 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 Area | Chemistry ; Materials Science |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000502548500068 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/136286 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xiao, B. L.; Ma, Z. Y. |
| Affiliation | 1.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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