Abstract Two Ta-2.5W alloy sheets were cold-rolled to 1 mm and 0.5 mm thick and their plastic strain ratio (r values) were evaluated by tensile tests. The 0.5 mm sheet, comparing with the 1 mm sheet, showed a stronger variation of the r value. This is because that the {0 0 1}〈1 1 0〉 texture, as revealed by the EBSD, significantly increased in the 0.5 mm sheet, which led to the decrease of r value and the increase of anisotropy (Δr) and in turn the deterioration of deep drawing properties. An analytical model was established to correlate the microstructure evolution and the macroscopic r value.

中文翻译：

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不同压下比下Ta-2.5W合金薄板织构演变及r值各向异性研究

摘要 将两块Ta-2.5W合金板冷轧至1 mm和0.5 mm厚，并通过拉伸试验评估其塑性应变比（r值）。0.5 mm 板材与 1 mm 板材相比，r 值的变化更大。这是因为 EBSD 显示的 {0 0 1}<1 1 0> 织构在 0.5 mm 片材中显着增加，导致 r 值减小，各向异性 (Δr) 增加，反过来深冲性能的恶化。建立了一个分析模型来关联微观结构演变和宏观 r 值。