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首页> 外文期刊>Superconductor Science & Technology >Tensile fatigue behavior and crack growth in GdBa2Cu3O7-(x)/stainless-steel coated conductor grown via reactive co-evaporation
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Tensile fatigue behavior and crack growth in GdBa2Cu3O7-(x)/stainless-steel coated conductor grown via reactive co-evaporation

机译：通过反应共蒸发生长Gdba2cu3O7-（x）/不锈钢涂层导体的拉伸疲劳行为和裂纹生长

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摘要

(RE)Ba2Cu3O7-(x) (REBCO) conductors have the potential to enable a wide range of superconducting applications over a range of temperatures and magnetic fields (Vincent et al 2013 IEEE Trans. Appl. Supercond. 23 5700805), yet AC applications and devices with a charge/discharge cycle may be limited by the conductor fatigue properties. Here the fatigue behavior of GdBa2Cu3O7-x (GdBCO) conductors grown by reactive co-evaporation on stainless-steel substrates is reported for axial tensile strains, epsilon, up to 0.5% and 100 000 cycles. Failure mechanisms are investigated via microstructural studies and compared with a commercially available IBAD/MOCVD REBCO conductor. Results show that GdBCO/stainless-steel conductors retain their transport critical current for 10 000 cycles at epsilon =. 0.35% and epsilon = 0.45%, and for 1000 cycles at epsilon = 0.50%. The main cause of fatigue degradation in GdBCO conductors is crack propagation and delamination that initiates at the edge of the conductor due to manufacturing defects.
机译：（RE）BA2CU3O7-（X）（REBCO）导体有可能在一系列温度和磁场（VINCENT等人IEEE TRANT）中提供各种超导应用程序具有充电/放电循环的装置可以受导体疲劳性质的限制。这里据报道，通过在不锈钢基材上产生反应性共蒸发的GDBA2CU3O7-X（GDBCO）导体的疲劳行为用于轴向拉伸菌株，εε，ε，高达0.5％和100000次循环。通过微观结构研究调查了失效机制，并与商业上可获得的IBAD / MOCVD REBCO导体进行比较。结果表明，GDBCO /不锈钢导体在EPSILON =中保留其运输临界电流为10 000个循环。 0.35％和Epsilon = 0.45％，epsilon的1000个循环= 0.50％。 GDBCO导体中疲劳降解的主要原因是由于制造缺陷而在导体边缘发起的裂纹传播和分层。

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