Microstructural, mechanical and tribological properties of ultrafine-grained Cu–Cr–Zr alloy processed by high pressure torsion

Pürçek, G.; Yanar, H.; Demirtas, M.; Shangina, D.V.; Бочвар, Н. Р.; Dobatkin, S. V.

doi:10.1016/j.jallcom.2019.152675

Cited by 48 publications

(34 citation statements)

References 55 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 strength of Cu-Cr-Zr alloys can be significantly increased by thermo-mechanical processing (TMP) [5,10,14,16,19,[21][22][23][24][25][26]. Plastic deformation by drawing, cold rolling or rolling at cryogenic temperature, equal channel angular pressing (ECAP) increases strength due to dislocation strengthening and grain boundary strengthening [51,72,73].…”

Section: Introductionmentioning

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: Introductionmentioning

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

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“…Deformation strengthening mainly uses the work hardening so that the strength and hardness of the treated alloys are increasing. It is also one of the means commonly used for the Cu alloy strengthening [14]. The dislocation density increases in the plastic deformation process, and the crosscutting leads to the impeding of the further movement of dislocations.…”

Section: Deformation Strengtheningmentioning

confidence: 99%

High strength and high conductivity Cu alloys: A review

Yang

Lei

et al. 2020

Sci. China Technol. Sci.

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High strength and high conductivity (HSHC) Cu alloys are widely used in many fields, such as high-speed electric railway contact wires and integrated circuit lead frames. Pure Cu is well known to have excellent electrical conductivity but rather low strength. The main concern of HSHC Cu alloys is how to strengthen the alloy efficiently. However, when the Cu alloys are strengthened by a certain method, their electrical conductivity will inevitably decrease to a certain extent. This review introduces the strengthening methods of HSHC Cu alloys. Then the research progress of some typical HSHC Cu alloys such as Cu-Cr-Zr, Cu-Ni-Si, Cu-Ag, Cu-Mg is reviewed according to different alloy systems. Finally, the development trend of HSHC Cu alloys is forecasted. It is pointed out that precipitation and micro-alloying are effective ways to improve the performance of HSHC Cu alloys. At the same time, the production of HSHC Cu alloys also needs to comply with the large-scale, low-cost development trend of industrialization in the future.

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“…One of their conclusions is that the three previously mentioned cases show higher wear rates compared to the initial copper material, which is coarse-grained [15]. Purcek et al [16,17] studied the influence of HPT followed by a subsequent artificial aging treatment at 450 • C for 1 h on the tribological properties of a Cu-Cr-Zr alloy. The corresponding friction and wear tests are carried out using a tribometer with reciprocating ball-on-disc contact configuration, where the most significant result is that the combination of both HPT and artificial aging increases wear resistance and reduces the friction coefficient of the Cu-Cr-Zr alloy.…”

Section: Introductionmentioning

confidence: 99%

“…The corresponding friction and wear tests are carried out using a tribometer with reciprocating ball-on-disc contact configuration, where the most significant result is that the combination of both HPT and artificial aging increases wear resistance and reduces the friction coefficient of the Cu-Cr-Zr alloy. Furthermore, these authors analysed the influence of temperature on the previous tribological properties and, in order to do this, they performed the wear tests at 25, 200 and 400 • C [17].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Tribological Properties in Disks of AA-5754 and AA-5083 Aluminium Alloys Previously Processed by Equal Channel Angular Pressing and Isothermally Forged

Pérez

Irigoyen

Puertas

et al. 2020

Metals

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In the present study, the wear behaviour of two aluminium alloys (AA-5754 and AA-5083) is analysed where these have been previously processed by severe plastic deformation (SPD) with equal channel angular pressing (ECAP). In order to achieve the objectives of this study, several disks made of these alloys are manufactured by isothermal forging from different initial states. The microstructures of the initial materials analysed in this study have different accumulated deformation levels. In order to compare the properties of the nanostructured materials with those which have not been ECAP-processed, several disks with a height of 6 mm and a diameter of 35 mm are manufactured from both aluminium alloys (that is, AA-5754 and AA-5083) isothermally forged at temperatures of 150 and 200 °C, respectively. These thus-manufactured disks are tested under a load of 0.6 kN, which is equivalent to a stress mean value of 18 MPa, and at a rotational speed of 200 rpm. In order to determine the wear values, the disks are weighed at the beginning, at 10,000 revolutions, at 50,000 revolutions and at 100,000 revolutions, and then the volume-loss values are calculated. This study was carried out using specific equipment, which may be considered to have a block-on-ring configuration, developed for testing in-service wear behaviour of mechanical components. From this, the wear coefficients for the two materials at different initial states are obtained. In addition, a comparison is made between the behaviour of the previously ECAP-processed aluminium alloys and those that are non-ECAP-processed. A methodology is proposed to determine wear coefficients for the aluminium alloys under consideration, which may be used to predict the wear behaviour. It is demonstrated that AA-5754 and AA-5083 aluminium alloys improve wear behaviour after the ECAP process compared to that obtained in non-ECAP-processed materials.

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Microstructural, mechanical and tribological properties of ultrafine-grained Cu–Cr–Zr alloy processed by high pressure torsion

Cited by 48 publications

References 55 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

High strength and high conductivity Cu alloys: A review

Analysis of Tribological Properties in Disks of AA-5754 and AA-5083 Aluminium Alloys Previously Processed by Equal Channel Angular Pressing and Isothermally Forged

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