Stability Aspects of the High Strength High Conductivity Microcomposite Cu-Nb Wires Properties

Pantsyrny, V.; Shikov, A.K.; Vorobieva, A.; Khlebova, N. E.; Kozlenkova, N.I.; Potapenko, I.I.; Polikarpova, M.

doi:10.1109/tasc.2006.870554

Cited by 20 publications

(19 citation statements)

References 12 publications

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“…Since the fabrication of in situ CuNb wires is a complicated multi-step process, and the material appreciably strengthens at every stage, it is necessary to use softening intermediate annealing to avoid fracture, 60) and we reported on the effect of intermediate annealing on the structure and properties of CuNb wires in several publications. 66,8890) Let us consider the evolution of the structure of a multi-core CuNb composite with the true strain of 12.5.…”

Section: The Structure Of Nb In Heavily-deformed Cunb Compositesmentioning

confidence: 99%

“…The similar effect of annealing was observed in a number of publications, though different temperatures at which the Nb filaments coagulation starts were reported, ranging from 350°C to 500°C. 60,96,97) In a number of studies [see, e.g., Refs. 98, 99)] CuFe and CuNb composites fabricated by cold drawing or ARB were subjected to SPD by HPT to study their behavior, evolution of structure and texture and possible mechanical alloying under such treatment.…”

Section: The Structure Of Nb In Heavily-deformed Cunb Compositesmentioning

confidence: 99%

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Behavior of Nb and Cu–Nb Composites under Severe Plastic Deformation and Annealing

Popov

Попова

2019

Mater. Trans.

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Nowadays potentialities of obtaining bulk nanostructured materials with unique properties by various techniques of severe plastic deformation (SPD) are comprehensively studied, and niobium, being a refractory, but plastic enough metal, is an ideal object for such studies. Besides, niobium is a metal of special interest as an advanced functional material, being one of the main constituents of such important electrotechnical materials as high-strength CuNb composites and multifilamentary Nb 3 Sn-based and NbTi superconductors. The present paper is an overview on evolution of Nb microstructure under SPD via different routes and under large plastic deformation by cold drawing of composite wires (in a Cu matrix). The main attention in this paper is paid to the original studies of the authors (with their coauthors), but the available publications on the topics considered are involved and reviewed as well.

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Section: The Structure Of Nb In Heavily-deformed Cunb Compositesmentioning

confidence: 99%

Section: The Structure Of Nb In Heavily-deformed Cunb Compositesmentioning

confidence: 99%

Behavior of Nb and Cu–Nb Composites under Severe Plastic Deformation and Annealing

Popov

Попова

2019

Mater. Trans.

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“…1). The inner six layers of the coil are wound using CuNb wire [19] with a cross-section of 2.8 mm 4.3 mm. Wieland-K88 [20] wire with 4 mm 6 mm cross-section is employed for the outer ten layers of the magnet.…”

Section: T Pulsed Magnetmentioning

confidence: 99%

Status of the Pulsed-Magnet-Development Program at the Dresden High Magnetic Field Laboratory

Жерлицын¹,

Wustmann²,

Herrmannsdörfer³

et al. 2012

IEEE Trans. Appl. Supercond.

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The Dresden High Magnetic Field Laboratory (HLD) is a pulsed-field user facility which offers to researches a variety of experimental techniques combined with non-destructive pulsed magnetic fields. Recently a new, 9.5 MJ dual-coil magnet has been commissioned. This magnet has achieved magnetic field of 91.4 T in a 16 mm bore and it is available for users now. In this paper, we report on some key upgrades in the magnet design which have led to breaking the 90 T limit at the HLD. Further possible design improvements are discussed. In addition, we share our operational experience obtained with the pulsed magnets.Index Terms-Magnet design and construction, non-destructive pulsed magnet.

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“…Composite wires in which copper matrix is strengthened with thin Nb filaments are of special interest among the in situ composites, and there are a lot of publications devoted to them beginning from the end of the last century up to today [8][9][10][11][12][13][14][15]. The Cu-Nb conductors demonstrate the highest values of ultimate tensile strength (UTS) up to 2000 MPa for 18-20% Nb.…”

Section: Introductionmentioning

confidence: 99%

“…For more than two decades, various types of winding materials based on Cu-Nb microcomposites were worked out at the Bochvar Institute of Inorganic Materials (Moscow, Russia) [10][11][12][13]. At first, they were fabricated in form of thin single-core in-situ wires.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Features in Multicore Cu–Nb Composites

et al. 2021

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The study is devoted to heavily drawn multicore Cu–18Nb composites of cylindrical and rectangular shapes. The composites were fabricated by the melt-and-deform method, namely, 600 in situ rods of Cu–18%Nb alloy were assembled in a copper shell and cold-drawn to a diameter of 15.4 mm (e = 10.2) and then rolled into a rectangular shape the size of 3 × 5.8 mm (e = 12.5). The specimens were analyzed from the viewpoints of their microstructure, microhardness, and thermal stability. The methods of SEM, TEM, X-ray analysis, and microhardness measurements were applied. It is demonstrated that, at higher strain, the fiber texture 110Nb∥ 111Cu∥ DD (drawing direction), characteristic of this material, becomes sharper. The distortions of niobium lattice can be observed, namely, the 110 Nb interplanar distance is broadened in longitudinal direction of specimens and compacted in transverse sections. The copper matrix lattice is distorted as well, though its distortions are much less pronounced due to its recrystallization. Evolution of microstructure under annealing consists mainly in the coagulation of ribbon-like Nb filaments and in the vanishing of lattice distortions. The structural changes in Nb filaments start at 300–400 °C, then develop actively at 600 °C and cause considerable decrease of strength at 700–800 °C.

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Stability Aspects of the High Strength High Conductivity Microcomposite Cu-Nb Wires Properties

Cited by 20 publications

References 12 publications

Behavior of Nb and Cu–Nb Composites under Severe Plastic Deformation and Annealing

Behavior of Nb and Cu–Nb Composites under Severe Plastic Deformation and Annealing

Status of the Pulsed-Magnet-Development Program at the Dresden High Magnetic Field Laboratory

Microstructural Features in Multicore Cu–Nb Composites

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