Effect of the eutectic Al-(Ce,La) phase morphology on microstructure, mechanical properties, electrical conductivity and heat resistance of Al-4.5(Ce,La) alloy after SPD and subsequent annealing

Andrey E. Medvedev, Maxim Y. Murashkin, Nariman A. Enikeev, Ilyas Bikmukhametov, Ruslan Z. Valiev, Peter D. Hodgson, Rimma Lapovok

Research outputpeer-review

Abstract

This paper reports on a crucial role of the morphology of intermetallic Al11RE3 phase and Al/Al11RE3 interphase (where RE - Rare Earth) surface area, before plastic deformation, on the electrical and mechanical properties and the thermostability of aluminium alloys. Cast Al-4.5 (Ce + La) alloy samples, processed with and without spheroidization treatment (ST), were subjected to high pressure torsion (HPT) at room temperature (RT) followed by annealing at 230 degrees C, 280 degrees C and 400 degrees C for 1 h. It is demonstrated, that the changes of initial alloy structure (particles shape/size) and the decrease of interphase surface area affect the distribution of intermetallic particles after HPT, the distribution of ultrafine grains and the dislocation density, as well as the formation of a supersaturated solid solution of Ce and La in aluminium. The optimal combination of strength (ultimate tensile stress (sigma(UTS)) 430 MPa) and conductivity (55.9% International Annealed Copper Standard, IACS) was obtained after ST, HPT and an annealing temperature of 230 degrees C. (C) 2019 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)321-330
Number of pages10
JournalJournal of Alloys and Compounds
Volume796
DOIs
Publication statusPublished - 5 Aug 2019

Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

@article{cd701061dfd94063b8a0476c97c6c928,
title = "Effect of the eutectic Al-(Ce,La) phase morphology on microstructure, mechanical properties, electrical conductivity and heat resistance of Al-4.5(Ce,La) alloy after SPD and subsequent annealing",
abstract = "This paper reports on a crucial role of the morphology of intermetallic Al11RE3 phase and Al/Al11RE3 interphase (where RE - Rare Earth) surface area, before plastic deformation, on the electrical and mechanical properties and the thermostability of aluminium alloys. Cast Al-4.5 (Ce + La) alloy samples, processed with and without spheroidization treatment (ST), were subjected to high pressure torsion (HPT) at room temperature (RT) followed by annealing at 230 degrees C, 280 degrees C and 400 degrees C for 1 h. It is demonstrated, that the changes of initial alloy structure (particles shape/size) and the decrease of interphase surface area affect the distribution of intermetallic particles after HPT, the distribution of ultrafine grains and the dislocation density, as well as the formation of a supersaturated solid solution of Ce and La in aluminium. The optimal combination of strength (ultimate tensile stress (sigma(UTS)) 430 MPa) and conductivity (55.9{\%} International Annealed Copper Standard, IACS) was obtained after ST, HPT and an annealing temperature of 230 degrees C. (C) 2019 Elsevier B.V. All rights reserved.",
keywords = "Atom probe tomography, Electrical conductivity, High-pressure torsion, Intermetallic particles, Mechanical strength, Rare earth, DESIGN, STRENGTH, AL, SEGREGATION, SOLID-SOLUTION, SEVERE PLASTIC-DEFORMATION, METALS, GROWTH, ZR, GRAIN-BOUNDARY",
author = "Medvedev, {Andrey E.} and Murashkin, {Maxim Y.} and Enikeev, {Nariman A.} and Ilyas Bikmukhametov and Valiev, {Ruslan Z.} and Hodgson, {Peter D.} and Rimma Lapovok",
year = "2019",
month = "8",
day = "5",
doi = "10.1016/j.jallcom.2019.05.006",
language = "English",
volume = "796",
pages = "321--330",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier",

}

TY - JOUR

T1 - Effect of the eutectic Al-(Ce,La) phase morphology on microstructure, mechanical properties, electrical conductivity and heat resistance of Al-4.5(Ce,La) alloy after SPD and subsequent annealing

AU - Medvedev, Andrey E.

AU - Murashkin, Maxim Y.

AU - Enikeev, Nariman A.

AU - Bikmukhametov, Ilyas

AU - Valiev, Ruslan Z.

AU - Hodgson, Peter D.

AU - Lapovok, Rimma

PY - 2019/8/5

Y1 - 2019/8/5

N2 - This paper reports on a crucial role of the morphology of intermetallic Al11RE3 phase and Al/Al11RE3 interphase (where RE - Rare Earth) surface area, before plastic deformation, on the electrical and mechanical properties and the thermostability of aluminium alloys. Cast Al-4.5 (Ce + La) alloy samples, processed with and without spheroidization treatment (ST), were subjected to high pressure torsion (HPT) at room temperature (RT) followed by annealing at 230 degrees C, 280 degrees C and 400 degrees C for 1 h. It is demonstrated, that the changes of initial alloy structure (particles shape/size) and the decrease of interphase surface area affect the distribution of intermetallic particles after HPT, the distribution of ultrafine grains and the dislocation density, as well as the formation of a supersaturated solid solution of Ce and La in aluminium. The optimal combination of strength (ultimate tensile stress (sigma(UTS)) 430 MPa) and conductivity (55.9% International Annealed Copper Standard, IACS) was obtained after ST, HPT and an annealing temperature of 230 degrees C. (C) 2019 Elsevier B.V. All rights reserved.

AB - This paper reports on a crucial role of the morphology of intermetallic Al11RE3 phase and Al/Al11RE3 interphase (where RE - Rare Earth) surface area, before plastic deformation, on the electrical and mechanical properties and the thermostability of aluminium alloys. Cast Al-4.5 (Ce + La) alloy samples, processed with and without spheroidization treatment (ST), were subjected to high pressure torsion (HPT) at room temperature (RT) followed by annealing at 230 degrees C, 280 degrees C and 400 degrees C for 1 h. It is demonstrated, that the changes of initial alloy structure (particles shape/size) and the decrease of interphase surface area affect the distribution of intermetallic particles after HPT, the distribution of ultrafine grains and the dislocation density, as well as the formation of a supersaturated solid solution of Ce and La in aluminium. The optimal combination of strength (ultimate tensile stress (sigma(UTS)) 430 MPa) and conductivity (55.9% International Annealed Copper Standard, IACS) was obtained after ST, HPT and an annealing temperature of 230 degrees C. (C) 2019 Elsevier B.V. All rights reserved.

KW - Atom probe tomography

KW - Electrical conductivity

KW - High-pressure torsion

KW - Intermetallic particles

KW - Mechanical strength

KW - Rare earth

KW - DESIGN

KW - STRENGTH

KW - AL

KW - SEGREGATION

KW - SOLID-SOLUTION

KW - SEVERE PLASTIC-DEFORMATION

KW - METALS

KW - GROWTH

KW - ZR

KW - GRAIN-BOUNDARY

UR - http://www.scopus.com/inward/record.url?scp=85065866404&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/effect-eutectic-alcela-phase-morphology-microstructure-mechanical-properties-electrical-conductivity

U2 - 10.1016/j.jallcom.2019.05.006

DO - 10.1016/j.jallcom.2019.05.006

M3 - Article

VL - 796

SP - 321

EP - 330

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -