A multiscale architectured CuCrZr alloy with high strength, electrical conductivity and thermal stability

Liang, Ningning; Liu, Jizi; Lin, Sicong; Wang, Yue; Wang, Jing Tao; Zhu, Yuntian

doi:10.1016/j.jallcom.2017.11.309

Cited by 85 publications

(29 citation statements)

References 41 publications

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“…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%

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: 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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“…In this manner, the properties of Cu-0.45wt%Cr-0.12wt%Zr alloy (1000°C/2 h + 8 passes of ECAP + aging 460°C/1 h) were successfully increased to a level of approx. 700 MPa, with electrical conductivity equal to 77% IACS, as presented in paper [29]. On the other hand, however, as a result of annealing at 920°C, followed by cold rolling (60%) and, finally, aging at 470°C for 4 h Cu-0.3wt%Cr-0.1wt%Zr-0.05wt%Mg alloy reaches an equally high hardness (165 HV) and good conductivity (79.2 IACS) properties [30].…”

Section: Introductionmentioning

confidence: 82%

Strength properties and structure of CuCrZr alloy subjected to low-temperature KOBO extrusion and heat treatment

Ostachowski

Bochniak

Łagoda

et al. 2019

Int J Adv Manuf Technol

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KOBO extrusion of metals and alloys strongly activates the point defect generation processes, as a result of which they reach a concentration exceeding the equilibrium level by many orders of magnitude. This leads to significant acceleration of diffusion phenomena which in heat-treatable alloys may cause disturbance of the thermodynamic equilibrium between the solid solution decomposition and dissolution of precipitates. In this work, measurements of mechanical and electrical properties and structural observations Cu1Cr0.1Zr alloy subjected to low-temperature KOBO extrusion at different stages of multi-variant heat treatment were conducted. In addition, the geometry of the extruded alloy's flow zone was analyzed and the obtained results made it possible to assess the effectiveness of experimental procedures, including product formation with high extrusion ratio λ, aimed at achieving of high and thermally stable functional properties of the material.

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“…Purcek et al [29] obtained the Cu-Cr-Zr alloy with 213 HV and 71%IACS using a combination of ECAP and aging at 425°C for 240 min processes. Liang et al [30] prepared Cu-0.45Cr-0.12Zr (wt.%) alloy by ECAP processes followed by aging treatment at 460°C. Its hardness reached the peak value of 219 HV at 1.5 h and then decreased slowly.…”

Section: Research Progresses In Hshc Cu Alloys 31 Cu-cr-zr Systemmentioning

confidence: 99%

“…Color online) Variations of hardness and electrical conductivity with aging time of the Cu-Cr-Zr alloys[30].…”

mentioning

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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A multiscale architectured CuCrZr alloy with high strength, electrical conductivity and thermal stability

Cited by 85 publications

References 41 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

Strength properties and structure of CuCrZr alloy subjected to low-temperature KOBO extrusion and heat treatment

High strength and high conductivity Cu alloys: A review

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