Enhancing strength-ductility synergy of carbon nanotube/7055Al composite via a texture design by hot -rolling

被引：26

作者：

Bi, S. ^{[1
,2
]}

Liu, Z. Y. ^{[1
]}

Xiao, B. L. ^{[1
]}

Zan, Y. N. ^{[1
,2
]}

Wang, D. ^{[1
]}

Wang, Q. Z. ^{[1
]}

Ma, Z. Y. ^{[1
]}

机构：

[1] Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2021年 / 806卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Aluminium matrix composites; Carbon nanotubes; Strength-ductility; Texture; Anisotropy;

D O I：

10.1016/j.msea.2021.140830

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The limited ductility of carbon nanotubes reinforced Al matrix (CNT/Al) composites hinders their engineering applications, which is an urgent problem to be solved. Herein, texture optimization through hot-rolling was employed to improve the strength-ductility of the CNT/7055Al composites. Microstructural examinations indicate that the composite subjected to extrusion (CNT/7055Al-E) had a bimodal structure with the coarse and ultrafine grains. The composite subjected to extrusion followed by hot-rolling (CNT/7055Al-ER) exhibited a uniform ultrafine grain structure. No further structure damage or aggregation was detected for the CNTs after hot-rolling. The texture analysis demonstrates that the CNT/7055Al-E had a 111 111 332 342 components with higher texture intensity. Compared with the CNT/7055Al-E, the CNT/7055Al-ER increased twofold in elongation with a slight decrease in strength, which was attributed to the favorable grain orientations, the increased proportion of low angle grain boundaries, as well as the fine and densely distributed precipitates. Further, the mechanical property anisotropy of the composite was weakened after hot-rolling due to the elimination of coarse grain bands.

引用

页数：13

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