Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

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

피로손상을 받은 NbTi초전도 선재의 RRR거동패동

  • 신형섭 (안동대학교 기계공학부) ;
  • 배영준 (안동대 대학원 기계공학과) ;
  • 하동우 (한국전기연구원 초전도응용연구그룹) ;
  • 오상수 (한국전기연구원 초전도응용연구그룹)
  • Published : 2001.05.01
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Abstract

In order to investigate the effect of fatigue damage on the properties of RRR in this study. fatigue tests at room temperature and residual resistivity measurement tests at 12K were carried out using annealed 9 strand Cu-Ni/NbTi/Cu composite cables Through fatigue tests of NbTi composite cables. a conventional S-N curve could be obtained even though there existed a possibility of fretting among strands, From the resistivity measurement of a NbTi strand after fatigue test, it was found that the RRR of xii·gin strand for annealed cables was 3 times more than that for as-received one. With increasing of fatigue cycles at a sress amplitude level. the RRR decreased. which was resulted from the accumulation of damage such as lattice defects and dislocation within the Cu stabilizer.

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References

  1. Advances in Cryogenic Engineering v.24 Fatigue and stress effects in NbTi and Nb₃Sn Multifilamentary Superconductors J.W.Ekin;K.D.Timmerhaus(ed.);R.P.Reed(ed.);A.F.Clark(ed.)
  2. 대한기계학회 논문집 A v.24 no.3 초전도 마그네트용 실용 초전도 케이블의 기계적 특성 및 피로손상 평가에 관한 연구 신형섭;오상수
  3. 제1회 한국초전도 · 저온공학회학술대회논문집 NbTi 초전도 케이블의 피로손상에 따른 RRR의 거동 신형섭;배영준;하동우;오상수
  4. Private communication Recent Progress of NbTi 46.5wt% Superconductor Strands at GEC ALSTHOM C.E.Bruzek;P.Mocaer(et al.)
  5. Advanced in Cryogenic Eng. v.30 Degradation of Copper Stabilizer in a Superconducting Wire Induced by Cyclic Stressing at Cryogenic Temperature K.Katagiri;K.Koyanagi;M.Fukumoto;T.Nishiura;T.Okada;M.Nagata
  6. 대한전기학회 하계학술대회 논문집 D 초전도선재의 잔류저항비 측정을 위한 장치제작 및 특성평가 김상철;오상수;하동우(등)
  7. Proc. of JSME MMD no.96-1 Fatigue Fracture Mechanisms and Superconducting Property of Nb-Ti Superconducting Composite Wire N.Iwasaki;M.Hojo(et al.)
  8. Trans. Met. Soc. AIME v.233 Imperfection Density of Fatigued and Annealed Copper Via Electrical Resistivity Measurements E.W.Johnson;H.H.Johnson
  9. Proc. of the Int Cryogenic Material Conf. (ICMC) Mechanical Properties of Superconducting Wire for 0.5MJ Pulsed Magnet at Cryogenic Temperatures K.Katagiri;S.Nishijima(et al.)