TY - JOUR

T1 - Influence of Deformation Temperature on the Effect of High Plasticity Implementation in Ultrafine-Grained Al–1.5Cu Alloy

AU - Мавлютов, Айдар Марселевич

AU - Орлова, Татьяна Сергеевна

AU - Яппарова, Эльмира Хабировна

AU - Еникеев, Нариман Айратович

AU - Мурашкин, Максим Юрьевич

N1 - Publisher Copyright: © 2021, Pleiades Publishing, Ltd.

PY - 2021/12/22

Y1 - 2021/12/22

N2 - Abstract: The effect of the temperature of uniaxial tensile test on the plastification effect (PE) of ultrafine-grained (UFG) Al–1.5Cu (wt %) alloy is studied for the first time. The UFG structure in a material is formed by high-pressure torsion (HPT). A significant increase in the plasticity of an UFG alloy from ~3 to 22% while retaining a high ultimate tensile strength (450 MPa) is achieved due to additional thermomechanical treatment including short-term low-temperature annealing and subsequent small HPT deformation. The temperature range of the PE implementation is revealed. It is shown that a decrease in the deformation temperature results in a gradual decrease in the PE and its disappearance at –20°C. Copper doping results in significant narrowing of the PE implementation range from the low-temperature side in comparison with the UFG Al case. The possible causes of the effect of Cu doping on the temperature dependence of the PE is discussed.

AB - Abstract: The effect of the temperature of uniaxial tensile test on the plastification effect (PE) of ultrafine-grained (UFG) Al–1.5Cu (wt %) alloy is studied for the first time. The UFG structure in a material is formed by high-pressure torsion (HPT). A significant increase in the plasticity of an UFG alloy from ~3 to 22% while retaining a high ultimate tensile strength (450 MPa) is achieved due to additional thermomechanical treatment including short-term low-temperature annealing and subsequent small HPT deformation. The temperature range of the PE implementation is revealed. It is shown that a decrease in the deformation temperature results in a gradual decrease in the PE and its disappearance at –20°C. Copper doping results in significant narrowing of the PE implementation range from the low-temperature side in comparison with the UFG Al case. The possible causes of the effect of Cu doping on the temperature dependence of the PE is discussed.

KW - aluminum–copper alloys

KW - grain-boundary segregation

KW - plasticity

KW - severe plastic deformation

KW - strength

KW - ultrafine-grained structure

UR - http://www.scopus.com/inward/record.url?scp=85121524500&partnerID=8YFLogxK

U2 - 10.1134/s1063783421100255

DO - 10.1134/s1063783421100255

M3 - Article

VL - 63

SP - 1792

EP - 1800

JO - Physics of the Solid State

JF - Physics of the Solid State

SN - 1063-7834

IS - 10

ER -