Microstructure of CNTs/2024Al composites prepared by rotational friction extrusion

被引：0

作者：

Xing L. ^{[1
]}

Ni Y.-P. ^{[1
,2
]}

Xu W. ^{[1
]}

Ke L.-M. ^{[1
]}

Jian Y. ^{[1
]}

机构：

[1] National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hongkong University, Nanchang

[2] Jiangxi Hongdu Aviation Industry Co., Ltd., Nanchang

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2017年 / 27卷 / 10期

基金：

中国国家自然科学基金;

关键词：

CNTs/2024Al composite; Grain size; High angle grain boundary fraction; Rotational friction extrusion; Texture;

D O I：

10.19476/j.ysxb.1004.0609.2017.10.07

中图分类号：

学科分类号：

摘要：

The carbon nanotubes (CNTs) reinforced 2024 Al matrix composites were fabricated by rotational friction extrusion (RFE).The crystal orientation, grain sizes, misorientation angle distributions and texture were analyzed by electron back scatter diffraction. The results show that the microstructure of aluminum matrix is the coarse strip, the average grain size is 48.67 μm and the large angle grain boundary content is 24.4%. After RFE, the microstructure of aluminum matrix becomes the fine equiaxed crystals by dynamic recrystallization. The average grain size of the RFE aluminum matrix decreases to 3.22 μm, and the large angle grain boundaries increases to 63.9%. With the increase of CNTs content, the average grain size of the CNTs/2024Al composites is gradually reduced to 1.97 μm and the ratio of large angle grain boundaries increases to 82.7% when the content of CNTs increases to 5%. CNTs can prevent the growth of the grains in the composites. The maximum pole density of aluminum matrix decreases from 10.8 to 4.18 and the rolling texture intensity decreases. The recrystallization textures of the composites are weakened by the addition of CNTs. © 2017, Science Press. All right reserved.

引用

页码：2012 / 2019

页数：7

共 18 条

[1]

Guo L., Cai X.-L., Zhou L., Yi F., Li Z., Research progress on carbon nanotubes reinforced aluminum matrix composite, Mechanical Engineering Materials, 38, 9, pp. 1-5, (2014)

[2]

Jiang J.-L., Zhao S.-J., Yang H., Li W.-X., Mechanical properties of Al matrix composites reinforced with carbon nanotubes prepared by powder metallurgy, Journal of Materials Heat Treatment, 29, 3, pp. 6-9, (2008)

[3]

Abbasipour B., Niroumand B., Monir V.S.M., Compocasting of A356-CNT composite, Transactions of Nonferrous Metals Society of China, 20, 9, pp. 1561-1566, (2010)

[4]

Zhang X.-X., Geng L., Wang D.-Z., Preparation of CNTs/aluminium composites synthesised by squeeze casting

[5]

Liu Q., Ke L.M., Liu F.C., Huang C.P., Xing L., Microstructure and mechanical property of multi-walled carbon nanotubes reinforced aluminum matrix composites fabricated by friction stir processing, Materials and Design, 45, 3, pp. 343-348, (2013)

[6]

Huang K.-H., Ke L.-M., Xing L., Chen Y.-H., Huang C.-P., Al<sub>3</sub>Ti intermetallic compounds fabricated by rotational extrusion alloying, Rare Metal Materials and Engineering, 40, 10, pp. 1812-1816, (2011)

[7]

Liu D.-Q., Huang C.-P., Liu Q., Ke L.-M., Xing L., Research on preparation of CNTs/Al by rotating friction extrusion method, Hot Working Process, 43, 2, pp. 101-103, (2014)

[8]

Lin M.-G., Xu W.-P., Ke L.-M., Liu Q., Interface microstructures of MWCNTs/Al composites prepared by rotational friction extrusion, Chinese Journal of Nonferrous Metals, 25, 1, pp. 98-102, (2015)

[9]

Zhao X., Ke L.-M., Xu W.-P., Liu G.-P., Carbon nanotubes reinforced aluminum matrix composites by friction stir processing, Journal of Composite Materials, 28, 2, pp. 185-190, (2011)

[10]

Mao W.-M., Zhao X.-B., Recrystallization and Grain Growth of Metals, (1994)

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