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首页> 外文期刊>Journal of Materials Engineering and Performance >Flow Stress-Strain Rate Behavior of Ti-3Al-2.5V Alloy at Low Temperatures in the Superplastic Range
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Flow Stress-Strain Rate Behavior of Ti-3Al-2.5V Alloy at Low Temperatures in the Superplastic Range

机译：Ti-3Al-2.5V合金在超塑性范围内的低温流动应力-应变速率行为

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摘要

Flow stress-strain rate behavior of Ti-3Al-2.5V, an α + β titanium alloy was studied at 750 and 800 °C by using the method of crosshead speed cycling. The alloy was found to exhibit superplasticity at these temperatures on the basis of complete flow stress, strain rate and strain rate sensitivity data. Strain-induced softening was observed in the alloy to a small extent at 750 °C and was thought to be related to the grain refinement occurring in both α- and β-phases during the initial stages of deformation. However, at 800 °C the effect was seen only under increasing strain-rate conditions. Flow stress versus strain rate curves generally exhibited only region II which corresponded to low- and intermediate-strain rates and region III corresponding to high-strain rates.
机译：采用十字头速度循环法研究了α+β钛合金Ti-3Al-2.5V在750和800°C的流动应力-应变速率行为。根据完全的流动应力，应变率和应变率敏感性数据，发现该合金在这些温度下表现出超塑性。在750°C时，在合金中观察到应变诱发的软化程度很小，并且被认为与变形初始阶段在α和β相中发生的晶粒细化有关。但是，在800°C时，仅在应变速率增加的条件下才能看到这种效果。流动应力与应变率曲线通常仅显示对应于低应变率和中等应变率的区域II和对应于高应变率的区域III。

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