Different fatigue behavior between tension-tension and tension-compression of carbon nanotubes reinforced 7055 Al composite with bimodal structure

doi:10.1016/j.carbon.2021.08.034

CORC > 金属研究所 > 中国科学院金属研究所

	Different fatigue behavior between tension-tension and tension-compression of carbon nanotubes reinforced 7055 Al composite with bimodal structure
	Bi, S.1,2; Liu, Z. Y.2; Xiao, B. L.2; Xue, P.2; Wang, D.2; Wang, Q. Z.2; Ni, D. R.2; Ma, Z. Y.2
刊名	CARBON
	2021-10-30
卷号	184 页码:364-374
关键词	Carbon nanotube Aluminum matrix composites Bimodal structure Fatigue Tension-tension Tension-compression
ISSN号	0008-6223
DOI	10.1016/j.carbon.2021.08.034
通讯作者	Liu, Z. Y.(zyliu@imr.ac.cn)
英文摘要	Understanding the fatigue behavior of Carbon nanotube (CNT) reinforced Al composites (CNT/Al) was of critical importance, for their further application in the aerospace industry. Although CNT could improve the fatigue performance, the fatigue behavior of CNT/Al composites with different structure (e.g. bimodal structure) under different fatigue conditions was still in lacking. In this study, the tension-tension/tension-compression fatigue behaviors of bimodal structure CNT/7055Al composites consisting of ultra-fine grain (UFG) zones rich of CNTs and coarse grain (CG) bands free of CNTs, were investigated and the corresponding damage mechanisms were analyzed. Results indicated that dislocation cells, tangles and subgrains were observed in the CGs, while no obvious dislocation configuration was detected in the UFGs after 107 fatigue cycles. Under the tension-tension fatigue condition, the fatigue strength of the composites was increased from 350 MPa to 400 MPa by load transfer effect of CNTs at 107 cycles. However, CNTs failed to improve the fatigue strength under the tension-compression fatigue condition due to the failure of the UFG zones rich of CNTs resulting from the high stress amplitude. It was found that strain localization in the CGs was the principal damage mechanism of CNT/7055Al composites. (C) 2021 Elsevier Ltd. All rights reserved.
资助项目	Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-JSC015] ; National Key R&D Program of China[2017YFB0703104] ; 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]
WOS研究方向	Chemistry ; Materials Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000703614300013
资助机构	Key Research Program of Frontier Sciences, CAS ; National Key R&D Program of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/166746]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Z. Y.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Bi, S.,Liu, Z. Y.,Xiao, B. L.,et al. Different fatigue behavior between tension-tension and tension-compression of carbon nanotubes reinforced 7055 Al composite with bimodal structure[J]. CARBON,2021,184:364-374.
APA	Bi, S..,Liu, Z. Y..,Xiao, B. L..,Xue, P..,Wang, D..,...&Ma, Z. Y..(2021).Different fatigue behavior between tension-tension and tension-compression of carbon nanotubes reinforced 7055 Al composite with bimodal structure.CARBON,184,364-374.
MLA	Bi, S.,et al."Different fatigue behavior between tension-tension and tension-compression of carbon nanotubes reinforced 7055 Al composite with bimodal structure".CARBON 184(2021):364-374.