Mechanical processing of Ag/BSCCO high temperature superconductor tape

Bay, Niels; Nielsen, Magda

doi:10.1016/j.jmatprotec.2004.04.005

Cited by 9 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among the numerous pressure-dependent constitutive models [20][21][22][23], the Drucker-Prager Cap (DPC) model is widely used to simulate the fabrication process of powderbased superconducting wires to predict the powder density or analyze the effect of process parameters on powder density [24][25][26][27][28][29]. Shah et al [24] first built a model for the drawing process of the Bismuth-Strontium-Calcium-Copper-Oxide (BSCCO) superconducting wire using the DPC model to predict the powder density and the drawing force.…”

Section: Introductionmentioning

confidence: 99%

“…Shah et al [24] first built a model for the drawing process of the Bismuth-Strontium-Calcium-Copper-Oxide (BSCCO) superconducting wire using the DPC model to predict the powder density and the drawing force. In the rolling process, the DPC model was also used to predict powder density of the BSCCO tape [25][26][27]. Those previous studies adopted simple cap shape and hardening rule due to the difficulties in obtaining material parameters for advanced model, which can accurately capture the deformation behavior of the powder under complex loading conditions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Superconducting MgB2 Wire Drawing Considering Anisotropic Hardening Behavior and Hydrostatic Effect

Lee

Chung

et al. 2021

Met. Mater. Int.

View full text Add to dashboard Cite

Numerical modeling was conducted to investigate the deformation behavior of powder mixture during multi-pass drawing processes for multi-filamentary MgB 2 wire. A modified Drucker-Prager Cap (DPC) model with an elliptical cap surface using the new material characterization method was developed to capture the anisotropic hardening behavior and hydrostatic effect of the powder mixture. A number of uniaxial die compaction, cold isostatic pressing, diametrical compression, and uniaxial compression tests were conducted using different powder densities to characterize the modified DPC model. A commercial finite element software ABAQUS with a user subroutine was used to simulate the drawing of the MgB 2 wire. The density and area fraction of the powder mixture during the wire-drawing process were verified with experimental results. The difference in packing density at the inner and outer filaments of the MgB 2 wire was successfully captured by simulation. In addition, the effect of the initial packing density on the superconducting properties of MgB 2 wire was numerically studied. It is shown that the increase in the superconducting area, which results from a high initial packing density, should be more effective compared to the increase in the grain connectivity in enhancing the critical current properties for the MgB 2 wire when the final packing density is saturated after a number of drawing processes.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superconducting MgB2 Wire Drawing Considering Anisotropic Hardening Behavior and Hydrostatic Effect

Lee

Chung

et al. 2021

Met. Mater. Int.

View full text Add to dashboard Cite

show abstract

“…Consequently, we ought to take the effect of multifactor into account when we make a decision towards the complex product. that multifactor influences on complex product is very important [4]. Renmiao Zhu and other researchers simulates product design process employing fractal theory and combining with matrix on the complexity as well as the dynamic feature on complex electromechanical product design process in that they employs the mega-idea of fractal.…”

Section: Introductionmentioning

confidence: 99%

The Fractal study in complex product self-similar form

Yu²,

He³

2015

Proceedings of the 2015 Joint International Mechanical, Electronic and Information Technology Conference

View full text Add to dashboard Cite

The paper analyzes Sierpinski self-similar feature of fractal, The paper also suggests product form modular design model and define multiple factors on complex product modeling through the interrelation between Similar Mapping and Fixed Point. The paper verifies the self-similar evolution method where the product gene feature can act as initial condition of complex product modeling by studying changing method for Sierpinski self-similar multiple form with combination of application of self-similar principle to complex product modeling design. Realted works Baogui Wu and other researchers suggest the general definition of complex product, they study basic methods on multidisciplinary optimization modeling of complex product, they present an issue

show abstract

“…Eriksen et al [4] aimed at producing multi-filament wires with square cross-sections, which would produce quite uniform, wide and thin filaments after flat rolling. Bay et al [5] did a research in which the tape from the square wire showed remarkable improvements in homogeneity compared with conventional tape made from round wire, and the drawing by square dies led to a 33% increase in the critical current capacity of the tape. However, the manufacture of square die cavity was very complex [6] , meanwhile round-to-square section drawing for multifilament superconducting wire is prone to yield cracks at the corner and can not be done in one pass, because the area reduction ratio is much less than 36.3%, thus the square die drawing process is difficult to implement in practical manufacture.…”

Section: Introductionmentioning

confidence: 99%

Investigation on drawing process of Bi-2223/Ag wires using racetrack-type dies: Simulation and experiments

Zhang

Lei

et al. 2009

Sci. China Ser. E-Technol. Sci.

View full text Add to dashboard Cite

The traditional rolling process of Bi-2223/Ag wires with circular sections is an inhomogeneous process. For the purpose of achieving a uniform filaments distribution, a novel technique for round wire through racetrack-type dies during the last several passes of drawing is necessarily brought forward. In order to investigate the processing behaviors of superconducting filaments, a numerical model for the three passes of racetrack drawing was constructed, and subsequently, the optimization of three racetrack-type dies was designed based on the simulation results. Then the three passes of racetrack drawing was applied to fabricate Bi-2223/Ag tape and the density distribution of each filament of the wire was studied by Vickers microhardness. The experimental results showed that the racetrack drawing can obtain dense superconducting filaments, and improve the mechanical properties and critical current of the final tape.racetrack-type die, Bi-2223/Ag, modelling

show abstract

Mechanical processing of Ag/BSCCO high temperature superconductor tape

Cited by 9 publications

References 14 publications

Superconducting MgB2 Wire Drawing Considering Anisotropic Hardening Behavior and Hydrostatic Effect

Superconducting MgB2 Wire Drawing Considering Anisotropic Hardening Behavior and Hydrostatic Effect

The Fractal study in complex product self-similar form

Investigation on drawing process of Bi-2223/Ag wires using racetrack-type dies: Simulation and experiments

Contact Info

Product

Resources

About