Microstructure of a low alloyed Cu-Cr-Zr alloy after ECAP-Conform

Morozova, A.; Lugovskaya, A.; Pylypenko, Andrii; Tkachev, M. Yu.; Рааб, Г. И.; Belyakov, Andrey; Kaibyshev, Rustam

doi:10.1088/1757-899x/1014/1/012029

Cited by 2 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the EBSD pattern, small recrystallized grains ~2 μm to 3 μm in size were observed within the band boundaries (Figure 2). This type of dynamic recrystallization directed along the boundaries of the bands is continuous [11][12][13].…”

Section: (C))mentioning

confidence: 99%

Structure and properties of the contact wire obtained by ECAP with forming

et al. 2023

View full text Add to dashboard Cite

This paper presents the results of the development of a promising method for manufacturing contact wires for high-speed railways. The developed method is based on the principles of severe plastic deformation and the combination of metal-forming processes. The solution obtained is a combination of equal-channel angular pressing with the forming of a shaped contact wire with a cross-sectional area of 120 mm2 in one tooling. A feature of the work is that with the help of a comprehensive study by the methods of finite element computer modeling and a physical experiment, not only the stress-strain state of the deformation zone was investigated but also an analysis was made of the effect of deformation heating, which plays an important role when working with dispersion-hardened alloys, such as Cu-0.65Cr. It was established that the temperature in the equal-channel angular pressing zone reached 490℃ to 505℃, and during shaping, it rose to 510℃ to 530℃. In the course of a physical experiment, a laboratory sample of a contact wire with a tensile strength of 410 ± 8 MPa and an electrical conductivity of 35 ± 2% IACS was obtained. Post-deformation aging led to an increase in tensile strength up to 540 ± 20 MPa and restoration of electrical conductivity up to 76 ± 2% IACS. Due to the formation of a stripe structure of a grain-subgrain type with recrystallized grains along the boundaries, the plasticity of the contact wire sample reached 20%.

show abstract

Section: (C))mentioning

confidence: 99%

Structure and properties of the contact wire obtained by ECAP with forming

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Morozova et al have investigated the microstructural of a Cu-0.1%Cr-0.1%Zr alloy after the ECAP-Conform process. It was found that during deformation the high-angle boundaries (HAB) transformed to low-angle boundaries (LAB) due to the strain-induced of the ECAP-Conform process [14]. Shahab et al [15] compared the distribution of equivalent plastic strain after the continuous confined strip shearing (C2S2) and the ECAP-Conform processes for 1100 Al numerically.…”

Section: Introductionmentioning

confidence: 99%

An investigation on the effective parameters and optimal design in ECAP-Conform process of commercially pure titanium using statistical and numerical approaches

2022

View full text Add to dashboard Cite

The Equal Channel Angular Pressing-Conform (ECAP-Conform) process has improved the mechanical and functional properties of materials as well as resolves the disadvantages of conventional ECAP. The main goal of this study was investigation of the variable in ECAP-Conform process of pure titanium Grade 2. The design of experiments with full factorial technique was implemented in conjunction with finite element numerical simulation.The equivalent plastic strain, required torque, applied force on the ECAP die, and the warping radius of the product were measured and results were interpreted using analysis of variance. It was found that the ECAP die angles and the rod bending angle have the highest effect on both imposed strain and required torque. Also, the rod bending angle and the rod-die friction had no significant effect on the warping radius. The optimal values were specified for minimizing the required torque, reaction force, and warping radius, and maximizing the imposed strain. Based on the optimal estimated parameters, the minimum values of torque, force, warping radius, and maximum value of equivalent strain were predicted to 8.4 kN.m, 42 kN, 0.36 m, and 1.7, respectively. Also, the response optimizer obtained the results with less than 8% error in comparison with numerical simulation.

show abstract

Microstructure of a low alloyed Cu-Cr-Zr alloy after ECAP-Conform

Cited by 2 publications

References 7 publications

Structure and properties of the contact wire obtained by ECAP with forming

Structure and properties of the contact wire obtained by ECAP with forming

An investigation on the effective parameters and optimal design in ECAP-Conform process of commercially pure titanium using statistical and numerical approaches

Contact Info

Product

Resources

About