Contributions of Various Strengthening Mechanisms to the Flow Onset Stress in the ECAP-Processed Cu-Cr-Zr Alloy

Faizov, I. A.; Рааб, Г. И.; Аксенов, Д. А.

doi:10.4028/www.scientific.net/kem.743.197

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…The experimental results including the data of different researches on the strain and alloying dependence of the strength for Cu-Cr-Zr alloys is shown in Fig. 6 [14,21,[23][24][25][26]38,47,[50][51][52][53][54][55][60][61][62]69,72,74,[96][97][131][132][133][134][135][136][137][138]. An increase of alloying is accompanied by the strengthening in all concentration range.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…The effect of different termo-mechanical treatments, deformation methods, deformation temperatures on UTS and elongation to failure, , of Cu-Cr-Zr alloys is shown in Fig. 8 [14,21,[23][24][25][26]38,47,[50][51][52][53][54]57,[60][61][62]69,72,74,96,97,118,[133][134][135][136][137][138][139]. It clearly seen that the plastic deformation leads to a decrease in plasticity from 30-70% in the solution treated/ aged condition to 0.5-20%.…”

Section: Plasticitymentioning

confidence: 99%

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Microstructure and Properties of Fine Grained Cu-Cr-Zr Alloys after Termo-Mechanical Treatments

Morozova

Mishnev

Belyakov

et al. 2018

Reviews on Advanced Materials Science

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Cu-Cr-Zr alloys provide an excellent combination of strength and electric conductivity and are frequently used as engineering materials in various electric/electronic devises. The present review deals with the microstructural design of Cu-Cr-Zr alloys, their alloying concept, thermo-mechanical processing based on technique of severe plastic deformation, physical mechanisms responsible for high strength and electric conductivity. The influences of microstructure and a dispersion of secondary phases on the mechanical properties and electric conductivity are discussed in detail. First, precipitation sequences during aging that leads to depletion of Zr and Cr solutes from Cu solution are critically reviewed in close connection with interaction mechanisms between dislocations and particles. Then, the main structure-property relationships of Cu-Cr-Zr alloys are considered. Finally, the strengthening of Cu-Cr-Zr alloys through severe plastic deformation by means of submicrocrystalline/nanocrystalline structure and increasing dislocation density as well as the effects of post-deformation heat treatment on the mechanical and electric properties are discussed.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Plasticitymentioning

confidence: 99%

Microstructure and Properties of Fine Grained Cu-Cr-Zr Alloys after Termo-Mechanical Treatments

Morozova

Mishnev

Belyakov

et al. 2018

Reviews on Advanced Materials Science

View full text Add to dashboard Cite

show abstract

“…Recently, drawing or rolling operations have been replaced by the continuous pressing of wire rods on extruders according to the traditional Conform scheme, which provides economic advantages due to the quick changeover of the line, reduction in production areas, and the range of equipment when receiving contact wires [11][12][13][14][15][16][17]. As an alternative to the combined approaches, continuous methods for producing products with a finite geometry, from the stage of continuous casting to the stage of product forming, can be used, applying modern methods of deformation processing such as SPD, for example [18][19][20][21][22]. The most promising applications for obtaining long products can be quite productive SPD processes with alternating forging (radial) and/or the method of equal channel angular pressing according to the Conform scheme (ECAP-C).…”

Section: Introductionmentioning

confidence: 99%

Study of the Combined Severe Plastic Deformation Techniques Applied to Produce Contact Wire for High-Speed Railway Lines

Asfandiyarov

Рааб

Аксенов

2020

Metals

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This work considers the development and the application of combined severe plastic deformation (SPD) techniques to produce contact wire with an enhanced complex of physical, mechanical, and service properties used for high-speed railway lines. This type of processing can be used as an alternative to most conventional production methods, including rolling and drawing. The proposed technique is based on the combination of radial swaging and equal-channel angular pressing, bundled with the wire-forming process. Laboratory contact wire samples with an enhanced complex of physical, mechanical, and service properties were produced during physical experiments. The composition of processed alloy samples meets modern requirements for contact wires for high-speed railways. Ultimate tensile strength of 560 ± 20 MPa, electrical conductivity of 76 ± 2% IACS, and relative tensile elongation of 20 ± 2% are achieved through the formation of a band structure. Fragments of 300 ± 20 nm were formed inside strips with the precipitation of secondary phase particles of 20–100 nm along the fragment boundaries, mainly during the aging process.

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Effect of Cd and SPD on structure, physical, mechanical, and operational properties of alloy of Cu-Cr-Zr

Аксенов

Raab

Asfandiyarov

et al. 2020

Reviews on Advanced Materials Science

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An increase in the service life of electrical products from copper and its alloys is directly related to an increase in the wear resistance of materials. Structural refinement and alloying with cadmium are known to have a positive effect on the strength characteristics and wear resistance of copper, which makes it possible, with a Cd content of 1% by weight, to increase the wear resistance of copper several times, but cadmium is considered an environmentally unsafe element. In this regard, the paper presents the results of studies of a widely used Cu-Cr-Zr alloy system in the ultrafine-grained (UFG) state, micro-alloyed with cadmium (0.2%, weight), in order to improve physical, mechanical, and operational properties, as well as environmental safety. Severe plastic deformation, providing structure refinement to ~150 nm, and microalloying with cadmium of a Cu-Cr-Zr system alloy, after a complete processing cycle, provides a tensile strength of 570±10 MPa and 67% electrical conductivity. At the same time, the abrasion resistance increases by 12 and 35% relative to the industrial systems Cu-Cd and Cu-Cr-Zr, respectively. The obtained characteristics are very promising for improving the operational properties of continuous welding tips, collector plates, and contact wires operating under conditions of intense wear.

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Contributions of Various Strengthening Mechanisms to the Flow Onset Stress in the ECAP-Processed Cu-Cr-Zr Alloy

Cited by 4 publications

References 6 publications

Microstructure and Properties of Fine Grained Cu-Cr-Zr Alloys after Termo-Mechanical Treatments

Microstructure and Properties of Fine Grained Cu-Cr-Zr Alloys after Termo-Mechanical Treatments

Study of the Combined Severe Plastic Deformation Techniques Applied to Produce Contact Wire for High-Speed Railway Lines

Effect of Cd and SPD on structure, physical, mechanical, and operational properties of alloy of Cu-Cr-Zr

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