Axial and lateral lattice strain states under a tensile load in as-reacted and prebent CuNb/Nb3Sn wires using neutron diffraction

作者：Takahashi K^*; Oguro H; Nishijima G; Awaji S; Watanabe K; Harjo S; Aizawa K

来源：Journal of Applied Physics, 2012, 111(4): 043908.

DOI：10.1063/1.3686692

Internal lattice strains under a tensile load for CuNb/Nb3Sn wires with and without prebending treatment were measured directly by neutron diffraction at room temperature. In the axial direction of the wire, the residual lattice strain was changed by 0.29% to the tensile side, while, in the lateral direction, the change was 0.03% to the compressive side due to the prebending treatment. The relationships between the axial and lateral lattice strains under axial stress are almost linear with a slope of about 0.3 for both wires; however, the absolute value of the lateral lattice strain differed at the same axial lattice strain. Tensile load dependences of the axial and lateral lattice strains of Cu and Nb in the wires were also obtained. The prebending treatment was found to affect the elastic-plastic deformation behavior of Cu and to change the internal lattice strains of Nb3Sn.

• 出版日期2012-2-15