Abstract
In this work, we develop a high-temperature dynamic testing technology for characterizing the properties of Ti-1023 alloy. The modified Hopkinson torsion bar system includes a high-temperature furnace subsystem and a water cooling subsystem. High-temperature dynamic tests of the alloy are performed. The dependence of the yield stress on the temperature and the shear strain rate is studied. The scanning electron microscopy observations show that the microstructural evolution makes up of two steps: the first one is caused by thermal loading and the second one by the mechanical loading. The high-temperature dynamic constitutive model is established based on the experimental results.
Highlights
Titanium Ti-1023 alloy is used to produce key components of aviation engine in the aerospace industry due to its high specific strength and stiffness
Its mechanical behaviour has been extensively studied for understanding the deformation mechanism and the influence of phase stability on the plastic flow process under isothermal compression and tension loading conditions [1,2]
For better understanding the machinability of this alloy, it is necessary to intensive study the mechanical behaviours under the high-temperature and high-strain rate shear loading conditions
Summary
Titanium Ti-1023 alloy is used to produce key components of aviation engine in the aerospace industry due to its high specific strength and stiffness. Its mechanical behaviour has been extensively studied for understanding the deformation mechanism and the influence of phase stability on the plastic flow process under isothermal compression and tension loading conditions [1,2]. A few of studies of the mechanical behaviour under the hightemperature environment and high-strain rate loading conditions has been conducted. For better understanding the machinability of this alloy, it is necessary to intensive study the mechanical behaviours under the high-temperature and high-strain rate shear loading conditions. This is our main concern at present. The high-temperature dynamic constitutive model is established based on the experimental results
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