基带厚度对无磁性Cu-45Ni合金基带立方织构形成的影响

Effect of Substrate Tape Thickness on Cube Texture Formation of Non-magnetic Cu-45Ni Alloy

摘要:

对总形变量相同，厚度分别为80和40 μm的Cu-45Ni（at%，下同）合金基带进行再结晶热处理后，采用X射线四环衍射，分析其冷轧织构及再结晶织构；采用电子背散射衍射技术（EBSD），通过对比分析两者高温热处理后立方织构、小角度晶界及孪晶界含量等的变化，研究基带厚度对无磁性Cu-45Ni合金基带立方织构形成的影响。结果表明：对于总形变量均为99%的2种基带，冷轧后均形成“Copper”型轧制织构，且轧制织构对不同厚度的Cu-45Ni合金基带再结晶立方织构的形成影响较小。厚度为40 μm的超薄带在高温热处理后更容易形成较强的立方织构，同时小角度晶界的含量也较高，这主要是由于发生部分再结晶时，厚度小的超薄基带中2个立方晶粒相遇并迅速长大，形成强立方织构的几率要大于普通厚度的基带。

Abstract:

The cold rolling texture and recrystallization texture of the 99 % reduced Cu-45Ni alloy substrates with thickness of 80 and 40 μm were investigated by XRD. The recrystallization evolution of those two Cu-45Ni alloy substrates were also investigated by electron backscattered diffraction (EBSD). The cube texture formation of Cu-45Ni alloy substrates with different thicknesses were demonstrated from the fraction of cube texture, low angle grain boundaries, and the average grain size. The results show that a “Copper” type rolling texture is obtained after 99% deformation reduction for both two tapes, and the rolling texture causes little impact on the cube texture formation. The substrates with 40 μm in thickness have a stronger cube texture and a high fraction of low angle grain boundaries. It is because the probability is higher that two cube grains meet and grow up fast to form a strong cube texture in the substrate with small thickness during partial recrystallization.