| Citation: | HUANG Zhaokuo, TENG Aijun, KANG Qiang, WANG Peng, DONG Entao. Hot deformation behavior and processing maps of wrought TC21 titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(2): 68-75. doi: 10.7513/j.issn.1004-7638.2025.02.010
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The high-temperature thermal deformation test was carried out by thermal simulation testing machine, and the stress-strain curves of wrought TC21 titanium alloy at temperature 850-1100℃ and strain rate 0.001-10 s−1 were obtained. The effects of deformation temperature and strain rate on the flow stress in the compressive stress state were analyzed, and the intrinsic relationship was established based on the Arrhenius hyperbolic sinusoidal function. The thermal processing diagrams under different true strains from 0.1 to 0.6 were plotted, so that the range of parameters suitable for thermal deformation of wrought alloys was summarized. The results indicate that the flow stress of wrought TC21 alloy is greatly affected by deformation parameters, which decreases with the increase of deformation temperature and increases with the increase of strain rate. The activation energy of TC21 alloy in the α+β two-phase region and β single-phase region is 770.86 kJ/mol and 261.00 kJ/mol, respectively. As true strain increases the destabilization zone becomes larger in the thermal processing map and the suitable hot working region is deformation temperature of 900-1100℃, and strain rate of 0.005-0.153 s−1. The test results can provide theoretical support for the formulation of TC21 alloy hot working parameters.
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