Effect of Compression with Oscillatory Torsion Processing on Structure and Properties of Cu

Rodak, K.; Pawlicki, J.

doi:10.1016/s1005-0302(11)60190-4

Cited by 19 publications

(9 citation statements)

References 9 publications

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“…A lot of the scientific investigations are focused on the research of new materials with a high efficiency and new technologies for their production [1][2][3][4][5][6]. Over the last two decades, a number of techniques were adopted to processing metals and alloys to grain refinement to nanoand sub-micrometer scale.…”

Section: Introductionmentioning

confidence: 99%

Deformation Microstructures in Metallic Materials after Severe Plastic Deformation by Rolling with Cyclic Movement of Rolls

et al. 2016

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The results of the microstructure investigations of the pure Al and AlMg5 alloy and pure Cu and CuFe2 alloy after the application of severe plastic deformation implemented by rolling with the cyclic movement of the rolls are presented in this paper. The rolling with the cyclic movement of the rolls was carried out at values: the rolling rate v = 1 rpm, the frequency of rolls movement f = 1 Hz, the amplitude of rolls movement A = 1.6 mm. Maximal values of rolling reduction at 6 passes was ε h = 80%. The structure of the these materials was analyzed using scanning transmission electron microscope. The quantitative studies of the substructure was performed with MET-ILO software, on the basis of images acquired on scanning transmission electron microscope. Performed substructure investigations showed that using the rolling with the cyclic movement of the rolls method can refine the microstructure of these materials to the ultrafine scale.

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Section: Introductionmentioning

confidence: 99%

Deformation Microstructures in Metallic Materials after Severe Plastic Deformation by Rolling with Cyclic Movement of Rolls

et al. 2016

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“…The commonly used methods for large plastic deformation SPD (Severe Plastic Deformation), despite their great research capabilities, have significant limitations, resulting from imperfections in the construction of stations and the lack of appropriate control and recording systems for monitoring the course of these complex deformation processes. Our own experience, gained during the construction of laboratory stations, confirms that, in many deformation processes, it is necessary to program the deformation path in the control system in advance, which of course further complicates the construction of devices [1][2][3]. Another important problem in the analysis of the results of complex shaping processes, most often multi-stage, is the use of an appropriate computational procedure, as well as the awareness of phenomena accompanying the subsequent stages of deformation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effects of an Unconventional Rolling Process under Cumulative Plastic Deformation Conditions

Pawlicki

Płachta

2023

Materials

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This article presents the results of research carried out on an experimental rolling mill with axial, cyclic movement of rolls (RCMR). The device was made on the basis of an unconventional technical solution for the movement of shaping tools and equipped with a complete measuring system recording all the parameters of the process. The research was conducted on selected copper alloys CuFe2 and CuCr0.6. Rolling tests in the RCMR process were carried out for rolling speeds vr = 3.1 × 10−3, 6.3 × 10−3 and 9.4 × 10−3 m/s, which correspond to the rotational speed of the rollers at ω = 1, 2 and 3 rpm for an active diameter of the rollers = 60 mm. In testing the thermal effects of the process, the rolling speed ω = 0.7 rpm was also used. A constant value of the frequency of axial movement of the rollers f = 1 Hz and the amplitude of the displacement of the rollers A = 0.8 mm were assumed. The rolling process for the strands was carried out in six culverts using the average relative crush in the passage of Δh = 15%. Conventional rolling tests were carried out to compare rolling processes, and the obtained data formed the basis for assessing the strain intensity and identifying local deformation zones in the RCMR rolling process. The waveforms of rolling pressures, intensity and non-uniformity of deformation, and increase in the temperature of the strip surface in subsequent culverts were compared with the results obtained in the conventional rolling process.

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“…Its application allows for the replacement of high-temperature deformation, with the process being conducted at cold temperatures and at a high speed, without initial heating of the charge, and with a much increased degree of deformation with a lower deformation work value. An additional advantage of this process is the achievement of beneficial mechanical properties, which are not typically observed in the case of other deformation methods [ 10 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Deformation Method on the Microstructure and Properties of Magnesium Alloy Mg-Y-RE-Zr

Bednarczyk

Kuc

2022

Materials

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This article presents the influence of the applied extrusion method on the microstructure and mechanical properties of the WE43 magnesium alloy. The materials for tests were ingots made from magnesium alloy, with dimensions of 40 × 90 mm, marked with the symbol WE43. Two extrusion methods were used: the classic one—concurrent extrusion, and the complex one—concurrent extrusion with a reversible die (KoBo). As a result of the application of deformation processes, rods were obtained. The implemented deformation methods made it possible to determine the influence of the deformation process parameters on changes in the structure and properties of the WE43 alloy. In addition, compression tests were performed to determine the values of the yield stress and to analyze changes in the microstructure after plastic deformation. The hot plastic deformation activation energy and the process parameters, for which the course of plastic flow is affected by the presence of twins in the microstructure, were determined for the WE43 alloy. The effects of superplastic flow at 350 °C (250% elongation) and microstructure refinement (d = 1 µm) were demonstrated after applying the KoBo method. The results will be useful in the development of forming technology of selected construction elements, which serve as light substitutes for currently used materials.

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Effect of Compression with Oscillatory Torsion Processing on Structure and Properties of Cu

Cited by 19 publications

References 9 publications

Deformation Microstructures in Metallic Materials after Severe Plastic Deformation by Rolling with Cyclic Movement of Rolls

Deformation Microstructures in Metallic Materials after Severe Plastic Deformation by Rolling with Cyclic Movement of Rolls

Analysis of the Effects of an Unconventional Rolling Process under Cumulative Plastic Deformation Conditions

The Influence of the Deformation Method on the Microstructure and Properties of Magnesium Alloy Mg-Y-RE-Zr

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