High-field superconducting critical values of titanium bronze multifilamentary Nb&amp;lt;inf&amp;gt;3&amp;lt;/inf&amp;gt;Sn conductors

Kamata, K.; Moriai, H.; Tada, N.; Watanabe, Kazuo; Nagata, Akihiko; Noto, Kōshichi

doi:10.1109/tmag.1987.1064968

Cited by 6 publications

(2 citation statements)

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“…1, respectively. This wire is one of the US-Japan reference wires [8]. As the prebending strain treatment, the 1051-8223/$20.00 © 2006 IEEE bending strain, , was loaded and unloaded 5 times at room temperature, where the opposite bending strains were applied alternately.…”

Section: Methodsmentioning

confidence: 99%

Neutron Diffraction Study on Prebending Effects for Bronze Route<tex>$rm Nb_3rm Sn$</tex>Wires Without Reinforcement

Awaji

Oguro

Nishijima

et al. 2006

IEEE Trans. Appl. Supercond.

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The critical current, upper critical field and critical temperature of bronze route Nb 3 Sn commercial wires are enhanced by applying a repeated bending strain at room temperature, i.e., "prebending strain". In order to investigate the prebending effects from a viewpoint of a residual strain, axial and lateral residual strains were evaluated directly by neutron diffraction at room temperature. We found that the axial residual strain changes from 0.10% to 0.02 % but the lateral one is unchanged by applying a prebending strain of 0.5% for an ordinary bronze route (Nb Ti) 3 Sn wires without reinforcement. Hence, in the case of the ordinary Nb 3 Sn wires without reinforcement, the prebending treatment modifies only the axial residual strain states independently to the lateral one, although it may depend on the wire structure. The critical current properties under the axial tensile strain suggest that the axial residual strain is reduced by about 0.11% but the radial residual strain unchanged by the prebending treatment of 0.5%. This is consistent with the results of the neutron diffraction.

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Section: Methodsmentioning

confidence: 99%

Neutron Diffraction Study on Prebending Effects for Bronze Route<tex>$rm Nb_3rm Sn$</tex>Wires Without Reinforcement

Awaji

Oguro

Nishijima

et al. 2006

IEEE Trans. Appl. Supercond.

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“…Four kinds of bronze route Ti-added Nb 3 Sn wires were used in this study (i.e. conventional Cu stabilized Nb 3 Sn, CuNb reinforced Nb 3 Sn, CuNbTi reinforced Nb 3 Sn and Ta filament reinforced Nb 3 Sn) [9][10][11][12]. The specifications and the photographs of the wire cross-sections are shown in table 1 and figure 1, respectively.…”

Section: Methodsmentioning

confidence: 99%

Prebending effects in bronze route Nb₃Sn wires

Awaji

Oguro

Nishijima

et al. 2005

Supercond. Sci. Technol.

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Control and optimization of the residual strain are one of the most important issues in the development of Nb3Sn superconducting magnets. We found that the repeated bending loads at room temperature change the prestrain of Nb3Sn wires and result in the enhancement of Jc, Bc 2 and Tc. We call this repeated bending strain ‘prebending strain’. In order to understand the prebending effect, superconducting properties were measured as functions of temperature, field, axial tensile stress and strain. In addition, the three-dimensional strain state was also evaluated by the neutron diffraction. Those obtained results strongly suggest that the prebending process changes the radial residual strain as well as the axial one independently. Hence, it is considered that the prebending effect is effective for the control and optimization of the three-dimensional strain state on the react and wind process.

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30Mei1 - 73Kit1

Flükiger¹,

Wolf²

Nb, Nb-Al - Nb-Ge

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High-field superconducting critical values of titanium bronze multifilamentary Nb<inf>3</inf>Sn conductors

Cited by 6 publications

References 5 publications

Neutron Diffraction Study on Prebending Effects for Bronze Route<tex>$rm Nb_3rm Sn$</tex>Wires Without Reinforcement

Neutron Diffraction Study on Prebending Effects for Bronze Route<tex>$rm Nb_3rm Sn$</tex>Wires Without Reinforcement

Prebending effects in bronze route Nb₃Sn wires

30Mei1 - 73Kit1

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High-field superconducting critical values of titanium bronze multifilamentary Nb&lt;inf&gt;3&lt;/inf&gt;Sn conductors

Cited by 6 publications

References 5 publications

Neutron Diffraction Study on Prebending Effects for Bronze Route<tex>$rm Nb_3rm Sn$</tex>Wires Without Reinforcement

Neutron Diffraction Study on Prebending Effects for Bronze Route<tex>$rm Nb_3rm Sn$</tex>Wires Without Reinforcement

Prebending effects in bronze route Nb3Sn wires

30Mei1 - 73Kit1

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High-field superconducting critical values of titanium bronze multifilamentary Nb<inf>3</inf>Sn conductors

Prebending effects in bronze route Nb₃Sn wires