Physical and Mechanical Properties of Copper and Copper Alloys

Li, Meimei; Zinkle, S.J.

doi:10.1016/b978-0-08-056033-5.00122-1

Cited by 156 publications

(78 citation statements)

References 96 publications

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“…The values of the electrical conductivity of nc Cu-Al 2 O 3 materials, Table 3, were lower as those of conventional CuCr and CuCrZr electrode alloys (70-80 %) [3]. Minimum value of the electrical conductivity required for the copper-based alloys for hightemperature applications is 50 % IACS [8].…”

Section: Possibilities Of Increasing the Electrical Conductivitymentioning

confidence: 99%

“…A significant amount of research effort has been expanded by studying and understanding the intrinsic fabrication characteristics, mechanical and electrical properties characterization of nanostructured copper [2]. The cold deformation hardened pure copper or precipitates hardened copper alloys such as Cu-Cr and Cu-Cr-Zr alloys are softened easily [3]. It is necessary to develop a novel material with a high softening temperature, high electrical conductivity, and high strength at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

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The electrical properties of nanocrystalline Cu-Al2O3

Orolínová¹,

Durisin²,

Ďurišinová³

et al. 2016

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Nanocrystalline (nc) Cu powders with Al2O3 dispersoid (1-5 vol.% Al2O3) were prepared by combination of phase transformations with intensive milling and the following consolidation by pressing, sintering and hot extrusion. The electrical properties of the composites were analysed in relation to their microstructure and strength. The main contribution to the electrical resistivity was attributed to the grain/crystallite size of Cu matrix. The fraction of Fe impurities dissolved within the Cu matrix and the amount of Al2O3 particles in the Cu matrix affected the electrical resistivity remarkably. The optimal combination of electrical and strength properties can be achieved by cut-down of Al2O3 content and by optimization of dispersoid distribution in the matrix.K e y w o r d s : nanocrystalline Cu-Al2O3 alloys, dispersion strengthening, electrical properties, thermal stability

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Section: Possibilities Of Increasing the Electrical Conductivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The electrical properties of nanocrystalline Cu-Al2O3

Orolínová¹,

Durisin²,

Ďurišinová³

et al. 2016

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“…The initial temperature of sample (°C) and quenching bath temperature (°C) were assigned as per the experimental conditions & simulation run time (sec) was also defined. To determinate surface temperature during quenching from HTC data of copper sample temperature dependent thermal properties such as density, heat capacity and thermal conductivity were given to software from literature [4] [5]. Film condition obtained from experiment i.e.…”

Section: Model Conditions Initial Conditions Boundary Conditions and Mmentioning

confidence: 99%

Correlation of heat transfer coefficient in quenching process using ABAQUS

Davare¹,

Balachandran²,

Singh³

2018

AIP Conference Proceedings

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Abstract. During the heat treatment by quenching in a liquid medium the convective heat transfer coefficient plays a crucial role in the extraction of heat. The heat extraction ultimately influences the cooling rate and hence the hardness and mechanical properties. A Finite Element analysis of quenching a simple flat copper sample with different orientation of sample and with different quenchant temperatures were carried out to check and verify the results obtained from the experiments. The heat transfer coefficient (HTC) was calculated from temperature history in a simple flat copper disc sample experimentally. This HTC data was further used as input to simulation software and the cooling curves were back calculated. The results obtained from software and using experimentation shows nearly consistent values.

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“…19 This means that the applied operating pressure could, in theory, deform the pure copper at the temperatures reached during the frictionwelding process. However, the purity of the Al/Cu joint probably exceeds the mentioned strength of the pure Cu since the material in the vicinity of the joint most probably becomes stronger due to the dissolution in the process of friction welding.…”

mentioning

confidence: 99%

Effects of friction-welding parameters on the morphological properties of an Al/Cu bimetallic joint

Milašinović¹,

Radovanović²,

Milašinović³

et al. 2016

Mater. Tehnol.

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The objective of this research is to consider the effects of certain parameters of the friction-welding process on the morphology of an aluminum/copper joint. The effect of the following parameters was monitored: the operating time, the operating pressure, the forging time and the forging pressure. The speed was constant during the binding process and reached 1500 min -1 . The preparation of the welding materials was performed in accordance with the industrial production conditions. With the SEM-EDS analysis, it was found that the morphology of the Al/Cu interface slightly changes when we change the distance from the rotation axis, irrespective of the combination of the friction-welding parameters. Apart from this, the joined effects of the operating pressure of 48 MPa and the forging pressure of 160 MPa caused a morphological change of the Al/Cu interface, while the forging time at the moment of the combined pressurizing effect significantly influenced the modification of the Al/Cu interface shape within a very narrow time interval of only a few seconds. Keywords: friction welding, bimetallic joint, interface, aluminum, copper, SEM-EDS Cilj te raziskave je obravnava vpliva nekaterih parametrov procesa tornega varjenja na morfologijo spoja aluminij/baker. Pregledan je bil vpliv naslednjih parametrov:~as delovanja, tlak pri obratovanju,~as kovanja in tlak pri kovanju. Hitrost 1500 min -1 je bila med spajanjem konstantna. Priprava materialov za varjenje je bila izvr{ena skladno s pogoji industrijske proizvodnje. S pomo~jo SEM-EDS analiz je bilo ugotovljeno, da se morfologija spoja Al/Cu rahlo spreminja s spreminjanjem razdalje od rotirajo~e osi, ne glede na kombinacijo parametrov procesa tornega varjenja. Poleg tega je skupni u~inek delovnega tlaka 48 MPa in tlaka pri kovanju 160 MPa povzro~il morfolo{ke spremembe spoja Al/Cu, medtem ko~as kovanja, v trenutku kombiniranega stiskanja mo~no vpliva na spremembo oblike Al/Cu spoja v zelo ozkem temperaturnem intervalu samo nekaj sekund.

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Physical and Mechanical Properties of Copper and Copper Alloys

Cited by 156 publications

References 96 publications

The electrical properties of nanocrystalline Cu-Al2O3

The electrical properties of nanocrystalline Cu-Al2O3

Correlation of heat transfer coefficient in quenching process using ABAQUS

Effects of friction-welding parameters on the morphological properties of an Al/Cu bimetallic joint

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