Fatigue Properties for Bi-2212 High Temperature Superconducting Round Wires Under Axial Tensile Loading

Fatigue Properties for Bi-2212 High Temperature Superconducting Round Wires Under Axial Tensile Loading
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Bi-2212高温超导圆线在轴向拉伸载荷下的疲劳性能

DOI:
10.1007/s10948-020-05477-3
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发表时间:
2020-03
影响因子:
1.8
通讯作者:
Zhao Y.
Zhao Y.
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Zhang H. Y.;Chen W.;Hao Q. B.;Li C. S.;Pan X. F.;Yang X. S.;Zhao Y.

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Bi-2212超导线材具有高的临界电流密度和无各向异性的临界磁场,为超高场超导磁体提供了重要的潜在应用。Bi-2212线对应变非常敏感。在应用过程中,股线不可避免地受到循环的热应力或电磁应力。对疲劳性能缺乏了解。研究了Bi-2212合金丝在轴向拉伸疲劳载荷下的临界电流退化行为。结果表明,疲劳寿命随最大疲劳应力的增加而降低。
Bi-2212 wires, which have high critical current density and critical magnetic field without anisotropy, offer significant potential applications for ultrahigh-field superconducting magnets. The Bi-2212 wire is very sensitive to strain. The strands are inevitably subjected to cyclic thermal or electromagnetic stress during application. There is a lack of understanding regarding the fatigue properties. In this paper, the degradation behavior of critical current for Bi-2212 wires under axial tensile fatigue loading was investigated. It was found that the fatigue life decreases with the increase in maximum fatigue stress.
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