Nanostructured Cu-Cr alloy with high strength and electrical conductivity

Исламгалиев, Р. К.; Нестеров, К. М.; Bourgon, Julie; Champion, Yannick; Valiev, Ruslan Z.

doi:10.1063/1.4874655

Cited by 124 publications

(87 citation statements)

References 17 publications

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“…In our case, DA, in the course of ECAP-C, results in solid solution decomposition, which contributes to certain electrical conductivity enhancement ( Table 2). The same effect of DA during SPD was observed in our previous studies [19][20][21][22][23]61]. The dependence of electrical conductivity of UFG Al-Mg-Si alloys on stable Mg2Si phase precipitates and precipitates of its metastable modifications [19][20][21][22][23] was analyzed.…”

Section: Properties and Microstructure Of The Ufg Alloy Processed Viasupporting

confidence: 54%

“…SPD-processing leads to grain refinement followed by solid solution decomposition and subsequent precipitation and can be used as a new approach to enhance mechanical strength of pure metals with retention of electrical conductivity. It was applied to pure Cu [59,60], and recently has been used to process Cu [61,62] and Al-based alloys [19][20][21][22][23]63]. In our case, DA, in the course of ECAP-C, results in solid solution decomposition, which contributes to certain electrical conductivity enhancement ( Table 2).…”

Section: Properties and Microstructure Of The Ufg Alloy Processed Viamentioning

confidence: 99%

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Enhanced Mechanical Properties and Electrical Conductivity in Ultrafine-Grained Al 6101 Alloy Processed via ECAP-Conform

Murashkin

Medvedev

Kazykhanov

et al. 2015

Metals

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This paper studies the effect of equal channel angular pressing-Conform (ECAP-C) and further artificial aging (AA) on microstructure, mechanical, and electrical properties of Al 6101 alloy. As is shown, ECAP-C at 130 °C with six cycles resulted in the formation of an ultrafine-grained (UFG) structure with a grain size of 400-600 nm containing nanoscale spherical metastable β′ and stable β second-phase precipitates. As a result, processed wire rods demonstrated the ultimate tensile strength (UTS) of 308 MPa and electrical conductivity of 53.1% IACS. Electrical conductivity can be increased without any notable degradation in mechanical strength of the UFG alloy by further AA at 170 °C and considerably enhanced by additional decomposition of solid solution accompanied by the formation of rod-shaped metastable β′ precipitates mainly in the ultrafine grain interior and by the decrease of the alloying element content in the Al matrix. It is demonstrated that ECAP-C can be used to process Al-Mg-Si wire rods with the specified UFG microstructure. The mechanical strength and electrical conductivity in this case are shown to be much higher than those in the industrial semi-finished products made of similar material processed by the conventional T6 or T81 treatment. OPEN ACCESSMetals 2015, 5 2149

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Section: Properties and Microstructure Of The Ufg Alloy Processed Viasupporting

confidence: 54%

Section: Properties and Microstructure Of The Ufg Alloy Processed Viamentioning

confidence: 99%

Enhanced Mechanical Properties and Electrical Conductivity in Ultrafine-Grained Al 6101 Alloy Processed via ECAP-Conform

Murashkin

Medvedev

Kazykhanov

et al. 2015

Metals

View full text Add to dashboard Cite

show abstract

“…3). [49][50][51][52] The development of metallic conductors with such attractive properties is one of the most topical subjects in modern electrical engineering. 50 Given that the global consumer market of AlMg-Si alloys for overhead power transmission lines 53 accounts for about 450,000 tons/year and continues to grow, the R&D activities focused on the improvement of their properties are of keen interest.…”

Section: Nanostructured Al and Cu Alloys With Enhanced Strength And Cmentioning

confidence: 99%

Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later

Valiev

Estrin

Horita

et al. 2016

JOM

396

186

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It is now well established that the processing of bulk solids through the application of severe plastic deformation (SPD) leads to exceptional grain refinement to the submicrometer or nanometer level. Extensive research over the last decade has demonstrated that SPD processing also produces unusual phase transformations and leads to the introduction of a range of nanostructural features, including nonequilibrium grain boundaries, deformation twins, dislocation substructures, vacancy agglomerates, and solute segregation and clustering. These many structural changes provide new opportunities for fine tuning the characteristics of SPD metals to attain major improvements in their physical, mechanical, chemical, and functional properties. This review provides a summary of some of these recent developments. Special emphasis is placed on the use of SPD processing in achieving increased electrical conductivity, superconductivity, and thermoelectricity, an improved hydrogen storage capability, materials for use in biomedical applications, and the fabrication of high-strength metal-matrix nanocomposites.

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“…For example, in the case of the Al-Mg-Si alloys, one should avoid GP zones and β'' precipitates as conductive electrons are most effectively scattered on these types of precipitates. This approach was successfully applied to the Cu-0.5Cr-0.12Ag alloy in [153]. The solution-treated material was subjected to HPT processing at room temperature which led to grain refinement ( Fig.…”

Section: Electrical Conductivitymentioning

confidence: 99%

Multifunctional Properties of Bulk Nanostructured Metallic Materials

Sabirov

Enikeev

Murashkin

et al. 2015

Bulk Nanostructured Materials With Multifunctional Properties

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This chapter focuses on multifunctional properties of bulk nanostructured metallic materials and structure-properties relationship therein. The most important structural factors affecting mechanical, physical, and chemical properties of the nanomaterials are discussed, and the strategies to their further improvement are outlined. Special attention is paid to nanostructural design for simultaneous improvement of mutually exclusive properties. Superstrength and Enhanced Mechanical PropertiesAlthough the mechanical and functional properties of all polycrystalline metallic materials are determined by several factors, the grain size of the material generally plays the most significant and often a dominant role. Thus, the strength of different polycrystalline materials is related to the grain size, d, through the Hall-Petch equation which states that the yield stress, σ y , is given bywhere σ o is termed the friction stress and k y the Hall-Petch constant [1,2]. It follows from Eq. 3.1 that the strength increases with a reduction in the grain size and this has led to an ever-increasing interest in fabricating materials with extremely small grain sizes. The fabrication of bulk samples and billets using equal channel angular pressing (ECAP), high pressure torsion (HPT), and other severe plastic deformation (SPD) techniques was a crucial first step in initiating investigations into the properties of bulk nanomaterials because the use of SPD processing permitted, and subsequently fully supported, a series of systematic studies using various nanostructured metallic materials including commercial alloys [3][4][5][6][7][8]

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Nanostructured Cu-Cr alloy with high strength and electrical conductivity

Cited by 124 publications

References 17 publications

Enhanced Mechanical Properties and Electrical Conductivity in Ultrafine-Grained Al 6101 Alloy Processed via ECAP-Conform

Enhanced Mechanical Properties and Electrical Conductivity in Ultrafine-Grained Al 6101 Alloy Processed via ECAP-Conform

Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later

Multifunctional Properties of Bulk Nanostructured Metallic Materials

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