한국초전도저온공학회:학술대회논문집 (Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference)
- 한국초전도저온공학회 2000년도 KIASC Conference 2000 / 2000년도 학술대회 논문집
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- Pages.104-108
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- 2000
피로손상을 받은 NbTi 초전도 선재의 RRR거동에 미치는 아닐링 효과
Annealing effect on RRR Behavior due to Fatigue Damage in NbTi Superconductor Cable
초록
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.
키워드