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Fabrication of high strength carbon nanotube/7055Al composite by powder metallurgy combined with subsequent hot extrusion
Ma, Kai1,2; Liu, ZhenYu1; Zhang, XingXing1; Xiao, BoLu1; Ma, ZongYi1
Corresponding AuthorLiu, ZhenYu(zyliu@imr.ac.cn)
2021-03-23
Source PublicationSCIENCE CHINA-TECHNOLOGICAL SCIENCES
ISSN1674-7321
Pages11
AbstractBimodal carbon nanotube reinforced 7055Al (CNT/7055Al) composites containing coarse grain bands and ultra-fine grain zones were fabricated by high energy ball milling, vacuum hot pressing followed by hot extrusion. The effect of extrusion temperature varied from 320 degrees C to 420 degrees C on the microstructure evolution and tensile properties were investigated. Microstructure observation indicates that the elongated coarse grain bands aligned along the extrusion direction after extrusion. The width of the coarse grain bands increased, and the length of the coarse grain bands increased firstly and then decreased with the increase of extrusion temperature. The grain size of the ultra-fine grain zones changed little after hot extrusion, but the ultra-fine grains coarsened after subsequent heat treatment, especially for the composite extruded at low temperature of 320 degrees C. By observing the CNT distribution, it was found that the higher temperature extrusion was beneficial to the CNT orientation along the extrusion direction. Furthermore, a precipitate free zone formed at the boundary between the coarse grain band and the ultra-fine grain zone as the composite extruded at high temperature of 420 degrees C. As the result of the comprehensive influence of the above microstructure, the tensile strength of the composite extruded at moderate temperature of 370 degrees C reached the highest of 826 MPa.
Keywordcarbon nanotube aluminum matrix composite hot extrusion bimodal mechanical property
Funding OrganizationKey Research Program of Frontier Sciences, CAS ; Project of Manned Spaceflight ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
DOI10.1007/s11431-020-1715-8
Indexed BySCI
Language英语
Funding ProjectKey Research Program of Frontier Sciences, CAS[QYZDJ-SSW-JSC015] ; Project of Manned Spaceflight[040103] ; National Natural Science Foundation of China[51931009] ; National Natural Science Foundation of China[51871214] ; National Natural Science Foundation of China[51871215] ; Youth Innovation Promotion Association CAS[2020197]
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Multidisciplinary ; Materials Science, Multidisciplinary
WOS IDWOS:000632777900001
PublisherSCIENCE PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/162018
Collection中国科学院金属研究所
Corresponding AuthorLiu, ZhenYu
Affiliation1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Ma, Kai,Liu, ZhenYu,Zhang, XingXing,et al. Fabrication of high strength carbon nanotube/7055Al composite by powder metallurgy combined with subsequent hot extrusion[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2021:11.
APA Ma, Kai,Liu, ZhenYu,Zhang, XingXing,Xiao, BoLu,&Ma, ZongYi.(2021).Fabrication of high strength carbon nanotube/7055Al composite by powder metallurgy combined with subsequent hot extrusion.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,11.
MLA Ma, Kai,et al."Fabrication of high strength carbon nanotube/7055Al composite by powder metallurgy combined with subsequent hot extrusion".SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2021):11.
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