Architectured hybrid conductors: Aluminium with embedded copper helix

TY - JOUR

T1 - Architectured hybrid conductors

T2 - Aluminium with embedded copper helix

AU - Lapovok, R.

AU - Popov, V. V.

AU - Qi, Y.

AU - Kosinova, A.

AU - Berner, A.

AU - Xu, C.

AU - Rabkin, E.

AU - Kulagin, R.

AU - Ivanisenko, J.

AU - Baretzky, B.

AU - Prokof'eva, O. V.

AU - Sapronov, A. N.

AU - Prilepo, D. V.

AU - Beygelzimer, Y.

N1 - Publisher Copyright: © 2019 The Authors

PY - 2020/2

Y1 - 2020/2

N2 - This study is inspired by the potential of application-designed aluminium-copper conductors. This work combines recently discovered advantages of hybrids with one constituent having a helical architecture with the benefits provided by severe plastic deformation (SPD) methods. The hybrids are made by embedding copper helixes in melted aluminium and subjecting cast hybrid ingots to different SPD techniques. The electrical conductivity, microstructure features and strength of the produced samples are discussed in relation to effect of SPD and annealing on both constituents and an interface zone formed during the hybrids' production. It was shown that between all processing techniques the reciprocal extrusion (RE) has the great potential for production of lightweight conductors with high conductivity and enhanced strength. A new model describing the effective electrical conductivity of hybrid samples, consisting of an aluminium matrix with an embedded copper helix and intermetallic containing interface, is developed and justified by experimental data. The model is shown to be instrumental for analysis of the effect of the helix's parameters and interface width on effective conductivity of the hybrid samples and could be used for optimal design of hybrid conductors.

AB - This study is inspired by the potential of application-designed aluminium-copper conductors. This work combines recently discovered advantages of hybrids with one constituent having a helical architecture with the benefits provided by severe plastic deformation (SPD) methods. The hybrids are made by embedding copper helixes in melted aluminium and subjecting cast hybrid ingots to different SPD techniques. The electrical conductivity, microstructure features and strength of the produced samples are discussed in relation to effect of SPD and annealing on both constituents and an interface zone formed during the hybrids' production. It was shown that between all processing techniques the reciprocal extrusion (RE) has the great potential for production of lightweight conductors with high conductivity and enhanced strength. A new model describing the effective electrical conductivity of hybrid samples, consisting of an aluminium matrix with an embedded copper helix and intermetallic containing interface, is developed and justified by experimental data. The model is shown to be instrumental for analysis of the effect of the helix's parameters and interface width on effective conductivity of the hybrid samples and could be used for optimal design of hybrid conductors.

KW - Conductivity

KW - Copper-aluminium hybrid materials

KW - Interface

KW - Intermetallic

KW - Microstructure

UR - http://www.scopus.com/inward/record.url?scp=85076745819&partnerID=8YFLogxK

U2 - 10.1016/j.matdes.2019.108398

DO - 10.1016/j.matdes.2019.108398

M3 - 文章

AN - SCOPUS:85076745819

SN - 0264-1275

VL - 187

JO - Materials and Design

JF - Materials and Design

M1 - 108398

ER -