Influence of high pressure torsion-induced grain refinement and subsequent aging on tribological properties of Cu-Cr-Zr alloy

Pürçek, G.; Yanar, H.; Shangina, D.V.; Demirtas, M.; Бочвар, Н. Р.; Добаткин, С. В.

doi:10.1016/j.jallcom.2018.01.303

Cited by 69 publications

(26 citation statements)

References 55 publications

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“…After, CuAl10Fe5Ni5 Aluminum bronze was used instead of CuSn14 Tin Bronze and the experiments were repeated. In recent years, many studies have been performed to investigate the tribological performance of the Cu and Al alloys [12][13][14][15][16][17][18][19]. Singh et al, investigated the wear and friction behaviour of copperbased hybrid composites in dry sliding conditions using pin-on-disc tribometer at variable normal load, constant sliding speed and sliding distance.…”

Section: Figure 1 Tamping Machine [7]mentioning

confidence: 99%

Tribological Properties of the Journal Bearings Used in Tamping Unit of Railways Tamping Machines

Çakir¹,

Tunay

2021

Teh. vjesn.

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A tamping machine is a machine used to pack the track ballast under railway tracks to make the tracks more durable. As well as being faster, more accurate, more efficient and less labour-intensive, tamping machines are essential for the use of concrete sleepers since they are too heavy to be lifted by hand. Tamping machines, also correct the alignment of the rails to make them parallel and level, in order to achieve a more comfortable ride for passengers and freight and to reduce the mechanical strain applied to the rails by passing trains. In this study, tribological properties of CuSn14 tin bronze used journal bearing system in aggregate of tamping machine were examined experimentally at different speeds and loads. Pin-on disc test apparatus was used for experiments. Experiments have been conducted so as to be able to determine the tribological properties in the event of using CuAl10Fe5Ni5 aluminum bronze considered as an alternative instead of tin bronze. The obtained results were compared with each other.

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Section: Figure 1 Tamping Machine [7]mentioning

confidence: 99%

Tribological Properties of the Journal Bearings Used in Tamping Unit of Railways Tamping Machines

Çakir¹,

Tunay

2021

Teh. vjesn.

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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%

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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“…The substantial influence of SPD processes, such as ECAP and high-pressure torsion (HPT), on the structure, precipitation sequence, thermal stability, and mechanical properties of Cu-based alloys has been the object of many studies [5,[21][22][23][24][25][26][27][28][29]. The processing of alloys by SPD produces significant grain refinement and a high density of dislocations and vacancies [30].…”

Section: Introductionmentioning

confidence: 99%

Cr cluster characterization in Cu-Cr-Zr alloy after ECAP processing and aging using SANS and HAADF-STEM

Abib¹,

Azzeddine²,

Alili³

et al. 2020

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The precipitation of nano-sized Cr clusters was investigated in a commercial Cu-1Cr-0.1Zr (wt.%) alloy processed by equal-channel angular pressing and subsequent aging at 550 • C for 4 h using Small-Angle Neutron Scattering (SANS) measurements and High-Angle Annular Dark-Field-Scanning Transmission Electron Microscopy (HAADF-STEM). The size and volume fraction of the nano-sized Cr clusters were estimated using both techniques. The parameter values assessed by SANS (d ∼ 3.2 nm, Fv ∼ 1.1 %) agreed reasonably with those by HAADF-STEM (d ∼ 2.5 nm, Fv ∼ 2.3 %). In addition to the nano-sized Cr clusters, HAADF-STEM indicated the presence of rare cuboid and spheroid sub-micronic Cr particles measuring approximately 380-620 nm in mean size. Both techniques did not evidence the presence of intermetallic CuxZry phases within the aging conditions.

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Influence of high pressure torsion-induced grain refinement and subsequent aging on tribological properties of Cu-Cr-Zr alloy

Cited by 69 publications

References 55 publications

Tribological Properties of the Journal Bearings Used in Tamping Unit of Railways Tamping Machines

Tribological Properties of the Journal Bearings Used in Tamping Unit of Railways Tamping Machines

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

Cr cluster characterization in Cu-Cr-Zr alloy after ECAP processing and aging using SANS and HAADF-STEM

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