Title :
Residual strain estimation in multifilamentary Nb/sub 3/Sn wires with CuNb reinforcement
Author :
Watanabe, K. ; Katagiri, K. ; Noto, K. ; Awaji, K. ; Awaji, S. ; Goto, Keisuke ; Sadakata, N. ; Saito, Takashi ; Kohno, O.
Author_Institution :
Inst. of Mater. Res., Tohoku Univ., Sendai, Japan
fDate :
6/1/1995 12:00:00 AM
Abstract :
The bronze processed multifilamentary Nb/sub 3/Sn superconducting wires with Cu-20 wt.% Nb composite reinforcement, which exhibited the high yield stress even after a typical heat treatment of about 700/spl deg/C for 8 days, have been fabricated. The strain effects on the critical current of the Nb/sub 3/Sn wires reinforced with CuNb composite were measured, and the estimation of residual strain was performed using a rule of mixtures. Good agreement is obtained between measured and calculated residual strain values.<>
Keywords :
copper alloys; critical currents; deformation; heat treatment; multifilamentary superconductors; niobium alloys; tin alloys; type II superconductors; yield stress; CuNb reinforcement; Nb/sub 3/Sn-NbCu; bronze processed wires; critical current; heat treatment; multifilamentary wires; residual strain; superconducting wires; yield stress; Capacitive sensors; Critical current; Current measurement; Heat treatment; Niobium; Performance evaluation; Residual stresses; Strain measurement; Superconducting filaments and wires; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
