Abstract
Hot compression deformation behavior of Ti-6Al-2Zr-3Ni alloy was investigated through thermal simulation tests in the range of 900- 1050°C, with strain rate from 0.001 s-1 to 1 s-1. The results demonstrates that flow stress reaches the maximum quickily, followed by flow softening with the increase of strain in all true stress-strain curves. At a constant strain rate, flow stress will decrease with the test temperature. Moreover, the temperature sensitivity of flow stress reduces largely at temperature between 980 to 1050°C, during which dynamic recovery is the main mechanism for the hot deformed alloy. In addition, flow stress increases with the strain rate. At lower temperature, recrystallization reduces or vanishes at temperature ranging from 900 to 940 °C due to thermodynamics factors.
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