Improving the high-cycle fatigue strength of heterogeneous carbon nanotube/Al-Cu-Mg composites through grain size design in ductile-zones

doi:10.1016/j.compositesb.2021.109094

IMR OpenIR

	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
通讯作者	Liu, Z. Y.(zyliu@imr.ac.cn) ; Xiao, B. L.(blxiao@imr.ac.cn)
	2021-10-01
发表期刊	COMPOSITES PART B-ENGINEERING
ISSN	1359-8368
卷号	222 页码:9
摘要	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.
关键词	Metal-matrix composites (MMCs) Carbon nanotube Fatigue Powder processing
资助者	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
收录类别	SCI
语种	英语
资助项目	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研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Composites
WOS记录号	WOS:000687382500002
出版者	ELSEVIER SCI LTD
引用统计	被引频次：28[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/166830
专题	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.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
推荐引用方式 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.