Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference (한국초전도저온공학회:학술대회논문집)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Annealing effect on RRR Behavior due to Fatigue Damage in NbTi Superconductor Cable

피로손상을 받은 NbTi 초전도 선재의 RRR거동에 미치는 아닐링 효과

  • 신형섭 (안동대학교 공과대학 기계공학과) ;
  • 오상엽 (경북대원) ;
  • 하동우 (한국전기연구소 초전도응용연구사업팀) ;
  • 오상수 (한국전기연구소 초전도응용연구사업팀)
  • Published : 2000.02.01
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Abstract

In this study, the fatigue test at room temperature and residual resistivity measurement test at 12K were carried out, respectively, using a 0 strand Cu-Ni/NbTi/Cu composite cable, in order to investigate how the annealing treatment effects on critical properties due to fatigue damage. Through a fatigue test of a 0 strand Cu-Ni/NbTi/Cu composite cables, a conventional S-N curve was obtained even though there existed a possibility of fretting among strands. From the resistivity measurement of a NbTi strand after fatigue tests, it was found that the RRR for annealed cables was 3 times more than that for as-received one, but with increase of the repeated number the RRR decreased which was resulted from the accumulation of damage such as lattice defects dislocation within the Cu stabilizer.

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