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Superplastic tensile tests of Ti-6Al-4V were performed at 890, 920 and 950 °C with different strain rates to explore the superplastic flow behavior of Ti-6Al-4V alloy. A new superplastic constitutive model was proposed considering the unique hardening characteristic of Ti-6Al-4V. The mean error of the developed constitutive model is about 35% lower than visco-plastic model and 63% lower than Johnson-Cook...
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