Multiscale modeling of the anisotropic electrical conductivity of architectured and nanostructured Cu-Nb composite wires and experimental comparison

被引：36
作者：
Gu, T. [1 ,2 ]
Medy, J. -R. [3 ]
Volpi, F. [4 ]
Castelnau, O. [1 ]
Forest, S. [2 ]
Herve-Luanco, E. [2 ,5 ]
Lecouturier, F. [6 ,7 ]
Proudhon, H. [2 ]
Renault, P. -O. [3 ]
Thilly, L. [5 ]
机构：
[1] CNRS, PIMM, CNAM, UMR 8006,Arts & Metiers ParisTech, 151 Bd Hop, F-75013 Paris, France
[2] PSL Res Univ, CNRS, MAT Ctr Mat, MINES ParisTech,UMR 7633, BP 87, F-91003 Evry, France
[3] Univ Poitiers, CNRS, Inst Pprime, UPR 3346,ISAE,ENSMA,SP2MI, Blvd Marie & Pierre Curie,BP 30179, F-86962 Futuroscope, France
[4] Univ Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, France
[5] Univ Versailles, 45 Ave Etats Unis, F-78035 Versailles, France
[6] CNRS, INSA, UGA, Lab Natl Champs Magnet Intenses,EMFL,UPS, Grenoble, France
[7] CNRS, INSA, UGA, Lab Natl Champs Magnet Intenses,EMFL,UPS, Toulouse, France
来源：
ACTA MATERIALIA | 2017年 / 141卷
关键词：
Architectured material; Electrical conductivity; Size effect; Multiscale modeling; Copper niobium composite; FIBER-REINFORCED COMPOSITES; THERMAL-CONDUCTIVITY; HIGH-STRENGTH; MECHANICAL-PROPERTIES; ELASTIC BEHAVIOR; RESISTIVITY; METALS; NANOCOMPOSITES; DEFORMATION; CONDUCTORS;
D O I：
10.1016/j.actamat.2017.08.066
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanostructured and architectured copper niobium composite wires are excellent candidates for the generation of intense pulsed magnetic fields (> 90T) as they combine both high electrical conductivity and high strength. Multi-scaled Cu-Nb wires can be fabricated by accumulative drawing and bundling (a severe plastic deformation technique), leading to a multiscale, architectured and nanostructured microstructure providing a unique set of properties. This work presents a comprehensive multiscale study to predict the anisotropic effective electrical conductivity based on material nanostructure and architecture. Two homogenization methods are applied: a mean-field theory and a full-field approach. The size effect associated with the microstructure refinement is taken into account in the definition of the conductivity of each component in the composites. The multiscale character of the material is then accounted for through an iterative process. Both methods show excellent agreement with each other. The results are further compared, for the first time, with experimental data obtained by the four-point probe technique, and also show excellent agreement. Finally, the qualitative and quantitative understanding provided by these models demonstrates that the microstructure of Cu-Nb wires has a significant effect on the electrical conductivity. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：131 / 141
页数：11
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