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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 AuthorLiu, Z. Y.(zyliu@imr.ac.cn) ; Xiao, B. L.(blxiao@imr.ac.cn)
2021-10-01
Source PublicationCOMPOSITES PART B-ENGINEERING
ISSN1359-8368
Volume222Pages:9
AbstractHeterogeneous 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.
KeywordMetal-matrix composites (MMCs) Carbon nanotube Fatigue Powder processing
Funding OrganizationKey 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
DOI10.1016/j.compositesb.2021.109094
Indexed BySCI
Language英语
Funding ProjectKey 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 AreaEngineering ; Materials Science
WOS SubjectEngineering, Multidisciplinary ; Materials Science, Composites
WOS IDWOS:000687382500002
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/166830
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, 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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