Critical current of a rapid-quenched Nb<sub>3</sub>Al conductor under transverse compressive and axial tensile stress

Article Article scientifique Article Critical current of a rapid-quenched Nb<sub>3</sub>Al conductor under transverse compressive and axial tensile stress eng 2011 author Seeber Bernd 26343 author Ferreira Alexandre 629637 author Mondonico Giorgio 668923 author Buta Florin 640973 author Senatore Carmine 0000-0002-9191-5016 561307 author Flukiger René-Louis 25218 author Takeuchi Takahiro 726072 035011 10.1088/0953-2048/24/3/035011 0953-2048 http://stacks.iop.org/0953-2048/24/i=3/a=035011?key=crossref.dac2f60a198b942370bdbc2268054f76 The electromechanical behavior of a Nb3Al wire manufactured according to the RHQT process (rapid-heating, quenching and transformation) has been investigated at magnetic fields between 15 and 19 T at 4.2 K. Of particular interest was the critical current, Ic, as a function of transverse pressure up to 300 MPa and as a function of axial tensile stress. The studied wires are pieces of a 870 m long copper stabilized Nb3Al wire with a rectangular cross section of 1.81 mm × 0.80 mm. It was observed that the critical current at 300 MPa transverse pressure, applied to the narrow side, is reduced to 93%, 90% and 88% of its stress free value at 15 T, 17 T and 19 T, respectively. After unloading from 300 MPa Ic recovers to 94% and 97% at 19 T and 15 T, respectively. A field dependence of the effect is visible above 200 MPa. For completeness, the critical current was also measured under axial tensile strain. The maximum of Ic is at 0.15% applied strain and irreversibility has been observed above 0.26%. Finally a stress versus strain measurement at 4.2 K has been carried out allowing the conversion from axial strain to stress. Dewey 500.2 33 Département de physique de la matière quantique 131 35 Groupe de physique appliquée 135 false 679 Groupe Senatore Superconductor science and technology 24 3 3c0605aa-429f-4386-8eaf-d5eef0b77616 Article (Published version) Restricted Senatore20.pdf 399872 application/pdf restrictedAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique Faculté des sciences / Section de physique / Groupe de physique appliquée

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Critical current of a rapid-quenched Nb₃Al conductor under transverse compressive and axial tensile stress	Superconductor science and technology			2011	690	0

Archive ouverte UNIGE

Takeuchi, Takahiro