热处理Cu-Nb纳米复合线的结构和织构演变

Microstructure and Texture Evolution of Cu-Nb Nanocom-posite Wire After Heat Treatment

摘要:

使用扫描电子显微镜和电子背散射衍射（EBSD）对热处理Cu-Nb纳米复合线的微观结构和织构演变进行了表征，同时对复合线材再结晶、晶粒形核、大角度晶界和残余内应力进行了讨论。结果表明，热处理使Cu-Nb纳米复合材料发生晶粒回复与再结晶，因此产生少量大角度晶界。热处理后，Cu-Nb复合材料的残余内应力减小。600 ℃以上热处理，Nb丝发生再结晶并且晶粒快速长大。Cu-Nb纳米复合线材具有良好的高温热稳定性。

Abstract:

The microstructure and texture evolution of Cu-Nb nanocomposite wire after heat treatment were characterized by the scanning electron microscope and electron backscatter diffractometer (EBSD). The recrystallization, nucleation, large angle boundary, and residual internal stress of the nanocomposite were also discussed. Results demonstrate that after the annealing treatment, the grain recovery and recrystallization occurs in the Cu-Nb nanocomposite and a small number of large angle boundaries appear. The residual internal stress becomes weaker after the annealing treatment. After annealing over 600 °C, the grains in Nb filaments are recrystallized and grow significantly. The Cu-Nb nanocomposite wire has good structural stability at high temperatures.