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利用XRD,SEM-ECC,TEM和EBSD技术,研究了Zr-Sn-Nb系新型锆合金板材加工过程的微观组织及织构演变.结果表明,β相淬火得到的随机织构经热轧后形成沿横向倾斜的基面织构,随后的加工过程均保留该织构;热轧及两次冷轧后的基面织构都为〈1010〉方向平行于轧向(〈1010〉//RD),而退火后转变为〈1210〉方向平行于轧向(〈1210〉//RD).淬火形成的网状魏氏组织经热轧转变为不均匀形变组织,两次冷轧使组织的不均匀性更显著,最终退火得到完全再结晶组织;轧制形成的难变形晶粒多为晶粒C轴平行于轧板法向(C//ND)的取向;最终退火板材的大晶粒多为〈1210〉//RD的基面织构,小晶粒则以〈1010〉//RD为主.结合锆合金的变形及再结晶机制对轧制时产生的不均匀组织及再结晶过程的织构转变进行了分析.
The microstructure and texture evolution of the new Zr-Sn-Nb zirconium alloy plates were studied by XRD, SEM-ECC, TEM and EBSD techniques. The results show that the random texture obtained by β-phase quenching is formed by hot rolling The texture of the base plane tilted in the transverse direction and the texture remained in the subsequent processing. Both the hot rolling and the base textures after the cold rolling were both parallel to the rolling direction (<1010> // RD) , And transformed into the <1210> direction parallel to the rolling direction (<1210> // RD) after annealing. The reticulated Widstreet formed by quenching was transformed to non-uniform deformed structure by hot rolling, More significant, and finally annealed to obtain completely recrystallized microstructure; the hard-deformed grains formed by rolling are mostly oriented parallel to the normal direction (C // ND) of the grains; the large grains of the finally annealed sheet are mostly <1210> // The basis texture of RD, while the small grains are mainly composed of <1010> // RD.With the deformation and recrystallization mechanism of zirconium alloy, the microstructure of the uneven microstructure and recrystallization Structural changes were analyzed.