Abstract Controlling the texture of tantalum sheets is of critical importance to fabricate good sputtering targets. In the present study two tantalum sheets were produced by clock rolling to 70% thickness reduction in 1 or 2 cycles. The results show that the stored energy and grain subdivision within the {111} grains { //normal direction (ND)} after 1 cycle are significantly higher than those after 2 cycles, leading to fast recrystallization kinetics and strong {111} recrystallized texture upon annealing. Simulations with Taylor model indicate that shear strain occurred on more slip systems in the 2-cycle sample, which could explain the formation of cell blocks in {111} grains.

中文翻译：

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对钽片中{111}晶粒微观结构均匀性的有益时钟滚动循环

摘要 控制钽片的织构对于制造良好的溅射靶至关重要。在本研究中，通过时钟轧制在 1 或 2 个周期内减少 70% 的厚度来生产两个钽板。结果表明，1个循环后{111}晶粒{//法向(ND)}内的储存能量和晶粒细分显着高于2个循环后，导致快速再结晶动力学和强{111}再结晶织构退火。泰勒模型的模拟表明，在 2 循环样品中，剪切应变发生在更多的滑移系统上，这可以解释 {111} 晶粒中细胞块的形成。