| Improving the high-cycle fatigue strength of heterogeneous carbon nanotube/Al-Cu-Mg composites through grain size design in ductile-zones | |
| Ma, K.1,2; Li, X. N.1; Liu, K.2; Chen, X. G.2; Liu, Z. Y.1; Xiao, B. L.1; Ma, Z. Y.1 | |
| Corresponding Author | Liu, Z. Y.(zyliu@imr.ac.cn) ; Xiao, B. L.(blxiao@imr.ac.cn) |
| 2021-10-01 | |
| Source Publication | COMPOSITES PART B-ENGINEERING
 |
| ISSN | 1359-8368 |
| Volume | 222Pages:9 |
| Abstract | Heterogeneous structure consisting of brittle-zones (BZs) rich of carbon nanotubes (CNTs) and ductile-zones (DZs) free of CNTs, was an effective way to improve the strength-ductility of CNT reinforced Al (CNT/Al) composites. Two heterogeneous CNT/2009Al composites with coarse grain (CG, -2 mu m) DZs or ultra-fine grain (UFG, -500 nm) DZs were fabricated and achieved enhanced strength-ductility. However, the heterogeneous composite with CG DZs had a lower high-cycle fatigue strength as well as fatigue strength/tensile strength ratio than the uniform composite, while the heterogeneous composite with UFG DZs exhibited the increased fatigue strength and the same level of fatigue strength/tensile strength ratio compared to the uniform composite. It was found that the improved fatigue properties for the heterogeneous composite with the UFG DZs could attribute to two reasons. Firstly, the UFG for the DZs significantly increased the strength of DZs, which effectively reduced the strain localization in the DZs. Secondly, the dislocations piling up at the grain boundaries of the BZs, as well as the stress concentration at the boundaries between the DZs and BZs were relieved due to the coordinated micro-strain for the heterogeneous structure. This provided a simple strategy for the structural design of heterogeneous composites with high fatigue strength. |
| Keyword | Metal-matrix composites (MMCs) Carbon nanotube Fatigue Powder processing |
| Funding Organization | Key R&D Program of China ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; China Scholarship Council |
| DOI | 10.1016/j.compositesb.2021.109094 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Key R&D Program of China[2017YFB0703104] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-JSC015] ; 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] ; China Scholarship Council |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Multidisciplinary ; Materials Science, Composites |
| WOS ID | WOS:000687382500002 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/166830 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, Z. Y.; Xiao, B. L. |
| Affiliation | 1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Quebec Chicoutimi, Dept Appl Sci, Saguenay, PQ G7H 2B1, Canada |
| Recommended Citation GB/T 7714 | Ma, K.,Li, X. N.,Liu, K.,et al. Improving the high-cycle fatigue strength of heterogeneous carbon nanotube/Al-Cu-Mg composites through grain size design in ductile-zones[J]. COMPOSITES PART B-ENGINEERING,2021,222:9. |
| APA | Ma, K..,Li, X. N..,Liu, K..,Chen, X. G..,Liu, Z. Y..,...&Ma, Z. Y..(2021).Improving the high-cycle fatigue strength of heterogeneous carbon nanotube/Al-Cu-Mg composites through grain size design in ductile-zones.COMPOSITES PART B-ENGINEERING,222,9. |
| MLA | Ma, K.,et al."Improving the high-cycle fatigue strength of heterogeneous carbon nanotube/Al-Cu-Mg composites through grain size design in ductile-zones".COMPOSITES PART B-ENGINEERING 222(2021):9. |
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