Back stress in strain hardening of carbon nanotube/aluminum composites

被引：90

作者：

Xu, Run ^{[1
]}

Fan, Genlian ^{[1
]}

Tan, Zhanqiu ^{[1
]}

Ji, Gang ^{[2
]}

Chen, Cai ^{[3
]}

Beausir, Benoit ^{[3
]}

Xiong, Ding-Bang ^{[1
]}

Guo, Qiang ^{[1
]}

Guo, Cuiping ^{[1
]}

Li, Zhiqiang ^{[1
]}

Zhang, Di ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[2] Univ Lille 1, CNRS, UMET, UMR 8207, F-59655 Villeneuve Dascq, France

[3] Univ Lorraine, CNRS, Lab Etud Microstruct & Mecan Mat LEM3, F-57045 Metz, France

来源：

MATERIALS RESEARCH LETTERS | 2018年 / 6卷 / 02期

关键词：

Carbon nanotubes; metal matrix composite; strain hardening; back stress; geometrically-necessary dislocations; METAL-MATRIX COMPOSITES; INTERNAL-STRESSES; STRENGTHENING MECHANISMS; GRAIN-SIZE; DEFORMATION; DISLOCATION; NANOTUBES; DUCTILITY; ALLOY; MODEL;

D O I：

10.1080/21663831.2017.1405371

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

As demonstrated by the loading-unloading tests and the modeling of the grain size effect and the composite effect, mainly owing to the back stress induced by CNTs, carbon nanotube/aluminum (CNT/Al) composites exhibit higher strain hardening capability than the unreinforced ultrafine-grained Al matrix. The back stress induced by CNTs should arise from the interfacial image force and the long-range interaction between statically stored dislocations and geometrically necessary dislocations around the CNT/Al interface. Therefore, this CNT-induced interfacial back stress strengthening mechanism is supposed to provide a novel route to enhancing the strain hardening capability and ductility in CNT/Al composites. [GRAPHICS] .

引用

页码：113 / 120

页数：8

共 29 条

[1] DEFORMATION OF PLASTICALLY NON-HOMOGENEOUS MATERIALS [J].

ASHBY, MF .

PHILOSOPHICAL MAGAZINE, 1970, 21 (170) :399-&

[2] Image force on a dislocation in a bcc bicrystal: Computer investigation of core effects [J].

Beauchamp, Pierre ;

Lépinoux, J. .

2001, Taylor and Francis Ltd. (81)

[3] WORK-HARDENING DUE TO INTERNAL STRESSES IN COMPOSITE-MATERIALS [J].

BROWN, LM ;

CLARKE, DR .

ACTA METALLURGICA, 1975, 23 (07) :821-830

[4] Structure-property optimization of ultrafine-grained dual-phase steels using a micro structure-based strain hardening model [J].

Delince, M. ;

Brechet, Y. ;

Embury, J. D. ;

Geers, M. G. D. ;

Jacques, P. J. ;

Pardoen, T. .

ACTA MATERIALIA, 2007, 55 (07) :2337-2350

[5]

DIETER G.E., 1988, MECH METALLURGY SI M

[6] A quantitative understanding on the mechanical behaviors of carbon nanotube reinforced nano/ultrafine-grained composites [J].

Dong, Shuhong ;

Zhou, Jianqiu ;

Hui, David .

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2015, 101 :29-37

[7] Size dependent strengthening mechanisms in carbon nanotube reinforced metal matrix composites [J].

Dong, Shuhong ;

Zhou, Jianqiu ;

Hui, David ;

Wang, Ying ;

Zhang, Shu .

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2015, 68 :356-364

[8] On the origin of the tensile flow stress in the stainless steel AISI 316L at 300 K: Back stress and effective stress [J].

Feaugas, X .

ACTA MATERIALIA, 1999, 47 (13) :3617-3632

[9] Effects of grain size on dislocation organization and internal stresses developed under tensile loading in fcc metals [J].

Feaugas, X. ;

Haddou, H. .

PHILOSOPHICAL MAGAZINE, 2007, 87 (07) :989-1018

[10] Microstructure-based modelling of isotropic and kinematic strain hardening in a precipitation-hardened aluminium alloy [J].

Fribourg, G. ;

Brechet, Y. ;

Deschamps, A. ;

Simar, A. .

ACTA MATERIALIA, 2011, 59 (09) :3621-3635

← 1 2 3 →