Evaluation of Microstructure and Texture Development in Zr-1.0Nb Sheet during Cold-Rolling

摘要:

对热轧的Zr-1Nb板材进行了不同变形量的冷加工，利用背散射电子衍射（EBSD）以及透射电子显微镜（TEM）研究了冷加工及热处理对其组织的影响。结果表明，随着冷加工变形量从30%增加到70%，晶粒尺寸逐渐从双态分布变为均匀分布。各种变形下的织构主要为（0001）<100>，且随着变形道次的增加强度逐渐增大。

Abstract:

The effect of manufacturing conditions such as rolling reductions and steps on the texture and microstructure was investigated for an hot-rolled Zr-1.0Nb sheet. The crystallographic texture of the cold-rolled and annealed sheet was examined by X-ray diffraction (XRD) for the rolling plane, and the microstructure was characterized by transmission electron microscopy (TEM) and electron back-scattering diffraction (SEM-EBSD). The results show that the grain size ranges from bimodal distribution to homogeneous distribution with the increase of cold rolling reductions from 30% to 70%. Textural developments are generalized in terms of (0001) and <100> fibers and enhanced by the progressive cold rolling and annealing. The correlation between texture and microstructure developments has been discussed extensively based on the obtained results.