Isothermal hot compression tests of two promising new titanium alloys (Ti‐10 V‐1Fe‐3Al and Ti‐10 V‐2Cr‐3Al) are performed using a TA DIL805D deformation dilatometer at temperatures in and above the two‐phase α + β region (730–880 °C) at strain rates ranging from 10⁻³ to 10⁻¹ s⁻¹. Results show that the flow stress of the two alloys decreases with increasing deformation temperature and decreasing strain rate. Some of the flow curves manifest clear discontinuous yielding and flow softening, both of which are strongly affected by the deformation conditions. The flow stress behavior of these two alloys can be described very well by a hyperbolic–sine Arrhenius equation. When deforming in the α + β phase region, the deformation mechanism is governed by the bending or globularization of the α phase. When deforming in the pure β phase field, the flow behavior is mainly determined by dynamic recovery or recrystallization. The difference in alloy composition has a minor effect on their hot working behavior.

中文翻译：

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两种新开发的亚稳态β钛合金在两相区上下流动行为的建模

使用TA DIL805D变形膨胀仪，在两相α+β区及以上的温度下，对两种有前途的新型钛合金（Ti-10 V-1Fe-3Al和Ti-10 V-2Cr-3Al）进行了等温热压缩试验。 （730–880°C），应变速率为10 ^-3到10 ^-1  s ^-1。结果表明，两种合金的流变应力随着变形温度的升高和应变速率的降低而减小。某些流动曲线显示出明显的不连续屈服和流动软化，这两者都受到变形条件的强烈影响。这两种合金的流动应力行为可以用双曲正弦阿伦尼乌斯方程很好地描述。当在α+β相区域中变形时，变形机理由α相的弯曲或球化控制。当在纯β相场中变形时，流动行为主要由动态恢复或再结晶决定。合金成分的差异对其热加工行为影响很小。