Structure optimization for improving the strength and ductility of heterogeneous carbon nanotube/Al-Cu-Mg composites

doi:10.1016/j.carbon.2021.03.006

CORC > 金属研究所 > 中国科学院金属研究所

	Structure optimization for improving the strength and ductility of heterogeneous carbon nanotube/Al-Cu-Mg composites
	Ma, K.1,2,3; Liu, Z. Y.3; Liu, K.2; Chen, X. Grant 2; Xiao, B. L.3; Ma, Z. Y.3
刊名	CARBON
	2021-06-30
卷号	178 页码:190-201
关键词	Carbon nanotube Al matrix composite Heterogeneous Mechanical property
ISSN号	0008-6223
DOI	10.1016/j.carbon.2021.03.006
通讯作者	Liu, Z. Y.(zyliu@imr.ac.cn) ; Xiao, B. L.(blxiao@imr.ac.cn)
英文摘要	Heterogeneous 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.
资助项目	Key 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研究方向	Chemistry ; Materials Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000648729800018
资助机构	Key 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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/160779]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Z. Y.; Xiao, B. L.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Univ Quebec Chicoutimi, Dept Appl Sci, Saguenay, PQ G7H 2B1, Canada 3.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 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.