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作为制备高温超导涂层导体的金属镍基带,需要具有良好的立方织构,而轧制变形量和退火温度对金属镍基体立方织构的形成有很大的影响。采用电子背散射衍射(EBSD)技术研究了不同预退火温度对冷轧形变量为89%的Ni-5%W(原子分数)合金立方再结晶织构的影响。样品先在300和670℃预退火1 h,然后经10%小变形量冷轧,最后在900℃退火1 h。结果表明:预处理温度对于立方再结晶织构的形成有重要的影响,经300℃预回复和670℃部分再结晶退火之后的样品在最终退火后都形成了较高含量的立方织构,且预退火温度对立方晶粒的形核、数量和尺寸有重要作用,经部分再结晶退火之后的样品在最终退火后形成的立方织构含量明显高于经预回复的样品。分析认为,预回复和部分再结晶样品经小变形轧制后,使立方取向晶粒回复加快,增加了立方取向晶粒形核的优势,从而促进立方再结晶织构含量的增加。与此同时,由于部分再结晶预退火比预回复退火形成的立方晶核多,再经小变形量轧制后,通过尺寸优势和应变诱导晶界移动机制(SIBM),部分再结晶预退火得到更多的立方晶粒。
As the preparation of high-temperature superconducting coated conductor metal nickel tape, we need to have a good cubic texture, and the amount of rolling deformation and annealing temperature on the formation of cubic nickel matrix cubic structure has a great impact. The effect of different pre-annealing temperatures on the cubic recrystallization texture of Ni-5% W (atomic fraction) alloy with cold deformation of 89% was studied by electron backscatter diffraction (EBSD). The samples were pre-annealed at 300 and 670 ℃ for 1 h, then cold-rolled with 10% deformation and annealed at 900 ℃ for 1 h. The results show that pretreatment temperature has an important effect on the formation of cubic recrystallization texture. After pre-annealing at 300 ℃ and partial recrystallization annealing at 670 ℃, the samples with high content of cubic texture are formed after final annealing The pre-annealing temperature plays an important role in the nucleation, number and size of cubic grains. The content of cubic texture formed by the final annealing after the partial recrystallization annealing is obviously higher than that of the pre-annealed samples. The analysis shows that the pre-recovery and partial recrystallization of the sample after the small deformation and rolling, the cube orientation grain recovery accelerated, increasing the advantages of cubic orientation grain nucleation, thereby promoting the cubic recrystallization texture content increases. In the meantime, some of the recrystallized pre-annealing is more than the cubic nuclei formed by pre-annealing, then the SIBM and the partially recrystallized pre-annealed More cubic grains.