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本实验研究了热压缩过程中应变速率和形变量等形变参数对TLM钛合金流变应力行为、微观组织和织构演变规律的影响。实验结果表明:在较高应变速率(≥0.1 s-1)热压缩应力应变曲线出现流动软化;在0.1 s-1应变速率下应力应变曲线呈现明显的振荡;在较低应变速率0.001 s-1应力应变曲线呈现稳态流动。在低应变速率(<0.1 s-1)和大变形量(>10%)条件下,合金不易发生动态再结晶;随着形变量的增大,再结晶晶粒的尺寸逐渐减小。较高的应变速率有利于形成{111}<112>织构。
In this experiment, the influence of deformation parameters such as strain rate and deformation on the flow stress behavior, microstructure and texture evolution of TLM titanium alloy during hot compression was investigated. The experimental results show that the flow stress softens at the higher strain rate (≥0.1 s-1), and the stress-strain curve shows obvious oscillation at 0.1 s-1 strain rate. At the lower strain rate of 0.001 s-1 The stress-strain curve shows steady-state flow. Under low strain rate (<0.1 s-1) and large deformation (> 10%), the dynamic recrystallization of the alloy is not easy to happen. With the increase of deformation, the recrystallization grain size decreases gradually. The higher strain rate favors the formation of {111} <112> texture.