Room and low temperature direct three-dimensional-strain measurements by neutron diffraction on as-reacted and prebent CuNb∕Nb3Sn wire
Room and low temperature direct three-dimensional-strain measurements by neutron diffraction on as-reacted and prebent CuNb∕Nb3Sn wire
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DOI：
10.1063/1.2732445
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发表时间：
2007-05
影响因子：
3.2
通讯作者：
H. Oguro;S. Awaji;G. Nishijima;P. Badica;K. Watanabe;F. Shikanai;T. Kamiyama;K. Katagiri
中科院分区：
文献类型：
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作者：
H. Oguro;S. Awaji;G. Nishijima;P. Badica;K. Watanabe;F. Shikanai;T. Kamiyama;K. Katagiri
本文用中子衍射法直接测量了CuNb SnInNb_3Sn合金丝在室温和7K下的轴向和横向残余应变，以研究预弯处理对残余应变的影响。在轴向方向的线，残余应变的变化与0.20%的拉伸侧时，在两个温度下测量，而在横向方向上，变化是0.08%和0.03%的压缩侧的测量在RT和7K，分别。根据所获得的数据，我们估计了偏应变。在7K时，反应态丝的该值为0.40%，当施加应变epb= 0.8%的预弯曲时，该值降低到0.19%。这些结果表明，在轴向方向以及在横向方向上的残余应变的减小，即，的偏应变是负责所观察到的增强超导性能的预弯曲Nb3Sn线。此外，我们还成功地进行了定量分析。
We measured directly by neutron diffraction the axial and lateral residual strains for the prebent and the as-reacted CuNb∕Nb3Sn wires at room temperature and at 7K, in order to investigate the change of the residual strain with prebending treatment. In the axial direction of the wire, the residual strain was changed with 0.20% to the tensile side when measured at both temperatures, while in the lateral direction, the change was 0.08% and 0.03% to the compressive side for the measurements at RT and 7K, respectively. From the obtained data, we estimated the deviatoric strain. At 7K, the value is 0.40% for the as-reacted wires and it reduces to 0.19% when the prebending is applied with a strain epb=0.8%. These results suggest that the reduction of the residual strain in the axial direction as well as in the lateral direction, i.e., of the deviatoric strain is responsible for the observed enhancement in the superconducting properties of the prebent Nb3Sn wires. In addition, we succeeded in the quantitative e...