TY - JOUR

T1 - The Impact of Severe Plastic Deformation on the Microstructure and Physicomechanical Properties of Al–0.4Zr

AU - Mavlyutov, A. M.

AU - Latynina, T. A.

AU - Murashkin, M. Yu

AU - Valiev, R. Z.

AU - Orlova, T. S.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Abstract: The influence of high pressure torsion on the microstructure and mechanical and electrical properties is elucidated for an Al–0.4Zr alloy pre-annealed at 648 K for 60 h. The transmission electron microscopy has revealed that the annealing causes the dispersive release of nanoparticles of a secondary Al 3 Zr phase. The formation of this structure in the alloy ensures an increase in its conductivity from 50.7 to 58.8% IACS owing to a decrease in the Zr concentration in a solid solution. As established, high pressure torsion processing at room temperature of the pre-annealed alloy leads to the formation of a uniform ultrafine structure in them, as well as to the partial dissolution of Al 3 Zr nanoparticles, resulting in higher strength and lower conductivity. It is shown that additional annealing of the ultrafine grained alloy for 1 h at 503 K results in a strength increase by 20% and the recovery of conductivity to the annealed state level (58.3% IACS).

AB - Abstract: The influence of high pressure torsion on the microstructure and mechanical and electrical properties is elucidated for an Al–0.4Zr alloy pre-annealed at 648 K for 60 h. The transmission electron microscopy has revealed that the annealing causes the dispersive release of nanoparticles of a secondary Al 3 Zr phase. The formation of this structure in the alloy ensures an increase in its conductivity from 50.7 to 58.8% IACS owing to a decrease in the Zr concentration in a solid solution. As established, high pressure torsion processing at room temperature of the pre-annealed alloy leads to the formation of a uniform ultrafine structure in them, as well as to the partial dissolution of Al 3 Zr nanoparticles, resulting in higher strength and lower conductivity. It is shown that additional annealing of the ultrafine grained alloy for 1 h at 503 K results in a strength increase by 20% and the recovery of conductivity to the annealed state level (58.3% IACS).

KW - aluminum-zirconium alloy

KW - electrical resistivity

KW - microhardness

KW - nanoscale particles

KW - severe plastic deformation

KW - ultimate tensile strength

KW - ultrafine grained structure

KW - yield stress

UR - http://www.scopus.com/inward/record.url?scp=85065576915&partnerID=8YFLogxK

U2 - 10.1134/S2075113319010210

DO - 10.1134/S2075113319010210

M3 - Article

AN - SCOPUS:85065576915

VL - 10

SP - 5

EP - 11

JO - Inorganic Materials: Applied Research

JF - Inorganic Materials: Applied Research

SN - 2075-1133

IS - 1

ER -