Hoop stress test on new high strength alloy laminated Bi-2223 conductor

Miyoshi, Yasuyuki; Nishijima, G.; Kitaguchi, Hitoshi; Chaud, X.

doi:10.1088/0953-2048/28/7/075013

Cited by 16 publications

(14 citation statements)

References 29 publications

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“…This leads, at B = 31.2 T and the achieved sample currents to an ε total of 0.94% for barrel 1 and to 0.95% for barrel 2. These values are significantly higher than reported by others [48, 57]. Despite these high loads, barrel 1 did not break even after 15 load-cycles, whereas barrel 2 broke at the 4 th load-cycle.…”

Section: Resultscontrasting

confidence: 55%

“…Sumitomo uses the product names DI-BSCCO HT-SS and DI-BSCCO HT-CA for laminated versions of their bare DI-BSCCO Type H tape. The allowable stresses in type HT-SS and HT-CA (270 MPa and 250 MPa respectively [48]) are drastically improved compared to the bare conductor. The allowable strain, however, is still limited by the yield strain of the lamination, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Attractive properties [54, 55], promising findings from other evaluations [48, 56, 57], and early suggestions of even higher strain limits in bending (allowable bending diameters between 20 and 30 mm [55] and unexpected-high load-performance under hoop stress [57]) triggered us to perform a systematic feasibility study on the suitability of DI-BSCCO HT-NX material for very high-field solenoids.…”

Section: Introductionmentioning

confidence: 99%

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A feasibility study of high-strength Bi-2223 conductor for high-field solenoids

Godeke

Abraimov

Arroyo

et al. 2017

Supercond. Sci. Technol.

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We performed a feasibility study on a high-strength Bi2−xPbxSr2Ca2Cu3O10−x (Bi-2223) tape conductor for high-field solenoid applications. The investigated conductor, DI-BSCCO Type HT-XX, is a pre-production version of Type HT-NX, which has recently become available from Sumitomo Electric Industries (SEI). It is based on their DI-BSCCO Type H tape, but laminated with a high-strength Ni-alloy. We used stress-strain characterizations, single- and double-bend tests, easy- and hard-way bent coil-turns at various radii, straight and helical samples in up to 31.2 T background field, and small 20-turn coils in up to 17 T background field to systematically determine the electro-mechanical limits in magnet-relevant conditions. In longitudinal tensile tests at 77 K, we found critical stress- and strain-levels of 516 MPa and 0.57%, respectively. In three decidedly different experiments we detected an amplification of the allowable strain with a combination of pure bending and Lorentz loading to ≥ 0.92% (calculated elastically at the outer tape edge). This significant strain level, and the fact that it is multi-filamentary conductor and available in the reacted and insulated state, makes DI-BSCCO HT-NX highly suitable for very high-field solenoids, for which high current densities and therefore high loads are required to retain manageable magnet dimensions.

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Section: Resultscontrasting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A feasibility study of high-strength Bi-2223 conductor for high-field solenoids

Godeke

Abraimov

Arroyo

et al. 2017

Supercond. Sci. Technol.

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“…Critical tensile stress c s decreases with bending diameter D, dropping to ∼300 MPa with D=80 mm, and ∼200 MPa with D=50 mm. The prediction is consistent with this experiment and c s =400 MPa at D=108 mm found by Miyoshi et al[23].…”

supporting

confidence: 93%

Strain control of composite superconductors to prevent degradation of superconducting magnets due to a quench: II. High-strength, laminated Ag-sheathed Bi-2223 tapes

Shen

Higley

2017

Supercond. Sci. Technol.

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Strain control of composite superconductors to prevent degradation of superconducting magnets due to a quench: II. High-strength, laminated Agsheathed Bi-2223 tapes To cite this article: Tengming Shen et al 2018 Supercond. Sci. Technol. 31 015012 View the article online for updates and enhancements. Related content Strain control of composite superconductors to prevent degradation of superconducting magnets due to a quench. I. Ag/Bi2Sr2CaCu2Ox multifilament round wires Liyang Ye, Pei Li, Jan Jaroszynski et al.-Quench degradation limit of multifilamentary Ag/Bi2Sr2CaCu2Ox round wires Liyang Ye, Pei Li, Tengming Shen et al.-High-field quench behavior and dependence of hot spot temperature on quench detection voltage threshold in a Bi2Sr2CaCu2Ox coil Tengming Shen, Liyang Ye, Daniele Turrioni et al.-Recent citations Impact of Fatigue Loading on the Critical Current of Bi-2223 Tapes under Background Magnetic Field Wei Chen et al

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“…The hoop stress limits of this newly available high-strength Bi-2223 has been measured by two different methods at LNCMI-Grenoble and Tsukuba Magnet Laboratory. The measurements confirm the new conductor's high tensile strength up to 400 MPa [19].…”

Section: Introductionsupporting

confidence: 71%