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Mechanical and electrical properties of an ultrafine grained Al-8.5wt. % RE (RE=5.4wt.% Ce, 3.1wt.% La) alloy processed by severe plastic deformation. / Murashkin, M. Yu; Sabirov, I.; Medvedev, A. E.; Enikeev, N. A.; Lefebvre, W.; Valiev, R. Z.; Sauvage, X.

в: Materials and Design, Том 90, 2016, стр. 433-442.

Результаты исследований: Научные публикации в периодических изданияхстатьяРецензирование

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@article{fb0f2fc5186b4f30913745ad05adb3d4,
title = "Mechanical and electrical properties of an ultrafine grained Al-8.5wt. % RE (RE=5.4wt.% Ce, 3.1wt.% La) alloy processed by severe plastic deformation",
abstract = "This work focuses on the effect of high pressure torsion (HPT) on the thermostability, microstructure, mechanical properties and electrical conductivity of an Al-8.5. wt.% RE (RE stands for rare earth Ce and La in the present case) alloy with respect to its potential application in electrical engineering. HPT processing leads to the formation of a very homogeneous ultra-fine grained microstructure resulting from the fragmentation of RE-rich intermetallic particles down to the nanoscale. Deformation induced supersaturated solid solution of RE atoms in the Al matrix is demonstrated for the first time. The HPT processed material shows an extraordinary high mechanical strength attributed to the high volume fraction of nanoscaled intermetallic particles and the ultrafine grained (UFG) microstructure. The various strengthening contributions were analyzed, and it was shown that the increase of strength during short time annealing could be attributed to the clustering of RE atoms in solid solution. The HPT processing induces a significant reduction of the electrical conductivity, but it was partly restored by annealing thanks to the concomitant clustering of RE atoms, reduction of dislocation density and grain growth. The potential applications of UFG Al-RE alloys in electrical engineering are finally discussed.",
keywords = "Al-RE alloy, Electrical conductivity, Mechanical strength, Nanostructure, Severe plastic deformation, Thermal stability",
author = "Murashkin, {M. Yu} and I. Sabirov and Medvedev, {A. E.} and Enikeev, {N. A.} and W. Lefebvre and Valiev, {R. Z.} and X. Sauvage",
year = "2016",
doi = "10.1016/j.matdes.2015.10.163",
language = "English",
volume = "90",
pages = "433--442",
journal = "Materials and Design",
issn = "0261-3069",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Mechanical and electrical properties of an ultrafine grained Al-8.5wt. % RE (RE=5.4wt.% Ce, 3.1wt.% La) alloy processed by severe plastic deformation

AU - Murashkin, M. Yu

AU - Sabirov, I.

AU - Medvedev, A. E.

AU - Enikeev, N. A.

AU - Lefebvre, W.

AU - Valiev, R. Z.

AU - Sauvage, X.

PY - 2016

Y1 - 2016

N2 - This work focuses on the effect of high pressure torsion (HPT) on the thermostability, microstructure, mechanical properties and electrical conductivity of an Al-8.5. wt.% RE (RE stands for rare earth Ce and La in the present case) alloy with respect to its potential application in electrical engineering. HPT processing leads to the formation of a very homogeneous ultra-fine grained microstructure resulting from the fragmentation of RE-rich intermetallic particles down to the nanoscale. Deformation induced supersaturated solid solution of RE atoms in the Al matrix is demonstrated for the first time. The HPT processed material shows an extraordinary high mechanical strength attributed to the high volume fraction of nanoscaled intermetallic particles and the ultrafine grained (UFG) microstructure. The various strengthening contributions were analyzed, and it was shown that the increase of strength during short time annealing could be attributed to the clustering of RE atoms in solid solution. The HPT processing induces a significant reduction of the electrical conductivity, but it was partly restored by annealing thanks to the concomitant clustering of RE atoms, reduction of dislocation density and grain growth. The potential applications of UFG Al-RE alloys in electrical engineering are finally discussed.

AB - This work focuses on the effect of high pressure torsion (HPT) on the thermostability, microstructure, mechanical properties and electrical conductivity of an Al-8.5. wt.% RE (RE stands for rare earth Ce and La in the present case) alloy with respect to its potential application in electrical engineering. HPT processing leads to the formation of a very homogeneous ultra-fine grained microstructure resulting from the fragmentation of RE-rich intermetallic particles down to the nanoscale. Deformation induced supersaturated solid solution of RE atoms in the Al matrix is demonstrated for the first time. The HPT processed material shows an extraordinary high mechanical strength attributed to the high volume fraction of nanoscaled intermetallic particles and the ultrafine grained (UFG) microstructure. The various strengthening contributions were analyzed, and it was shown that the increase of strength during short time annealing could be attributed to the clustering of RE atoms in solid solution. The HPT processing induces a significant reduction of the electrical conductivity, but it was partly restored by annealing thanks to the concomitant clustering of RE atoms, reduction of dislocation density and grain growth. The potential applications of UFG Al-RE alloys in electrical engineering are finally discussed.

KW - Al-RE alloy

KW - Electrical conductivity

KW - Mechanical strength

KW - Nanostructure

KW - Severe plastic deformation

KW - Thermal stability

UR - http://www.scopus.com/inward/record.url?scp=84952361347&partnerID=8YFLogxK

U2 - 10.1016/j.matdes.2015.10.163

DO - 10.1016/j.matdes.2015.10.163

M3 - Article

AN - SCOPUS:84952361347

VL - 90

SP - 433

EP - 442

JO - Materials and Design

JF - Materials and Design

SN - 0261-3069

ER -

ID: 16947969