Effect of Rotary Swaging on the Structure, Mechanical Characteristics and Aging Behavior of Cu-0.5%Cr-0.08%Zr Alloy

A study of the effect of rotary swaging (RS) on the microstructure and properties of the pre-extruded and pre-quenched Cu-0.5%Cr-0.08%Zr alloy was performed. RS leads to the formation of an ultrafine-grained (UFG) microstructure. UFG structure formation caused by RS increases the ultimate tensile st...

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Bibliographic Details
Published in:Materials 2022-12, Vol.16 (1), p.105
Main Authors: Martynenko, Natalia, Rybalchenko, Olga, Bodyakova, Anna, Prosvirnin, Dmitriy, Rybalchenko, Georgy, Morozov, Mikhail, Yusupov, Vladimir, Dobatkin, Sergey
Format: Article
Language:English
Subjects:
Aging
Aging (metallurgy)
Alloys
Chromium
Copper
Crystal lattices
Decomposition
Deformation
Ductility
Electric properties
Electrical conductivity
Electrical resistivity
Electrodes
Extrusion
Fatigue limit
Mechanical properties
Microstructure
Precipitation hardening
Quenching
Reduction
Rotary swaging
Solid solutions
Specialty metals industry
Swaging
Ultimate tensile strength
Ultrafines
Zirconium
Zirconium alloys
Zirconium base alloys
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Summary:A study of the effect of rotary swaging (RS) on the microstructure and properties of the pre-extruded and pre-quenched Cu-0.5%Cr-0.08%Zr alloy was performed. RS leads to the formation of an ultrafine-grained (UFG) microstructure. UFG structure formation caused by RS increases the ultimate tensile strength (UTS) up to 443 ± 5 MPa and 597 ± 9 MPa for pre-quenched and pre-extruded alloys, respectively. Additionally, the reduction in ductility occurs after RS. It should be noted that UTS is increased for a pre-quenched alloy, while the strength of a pre-extruded alloy is dropped. The growth of UTS for the pre-quenched alloy is associated with the precipitation of fine Cr particles, whereas the recovery processes in the pre-extruded alloy induce the reduction in its UTS. An additional advantage of RS is an increase in the fatigue limit of the pre-quenched alloy up to 265 MPa, and of the pre-extruded alloy up to 345 MPa. The combination of extrusion and RS allows for the increase of the UTS of the Cu-0.5%Cr-0.08%Zr alloy up to 597 ± 9 MPa, while the levels of ductility and electrical conductivity are 10.9 ± 0.9% and 82.0 ± 1.7% IACS, respectively.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16010105