School of Materials Engineering,Xi'an Aeronautical University, Xi'an 710077, China
The high temperature deformation behavior and microstructure evolution of TA19 alloy in the temperature range of 920-1030℃, strain rate range of 0.01s-1-10s-1 and height direction reduction of 60% have been studied by hot compressing testing. The microstructure of TA19 alloy was observed and analyzed using Olympus/PMG3 optical microscope. The flow stresses were correlated with strain rate and the temperature by the constitutive equation. The results show that the flow stress of TA19 alloy increase quickly with the strain, then decrease with a steady value. The Q value obtained in the α+β region for TA19 was 586KJ/mol, and in the β region was 290KJ/mol. It was also found that in α+β region, dynamic re-crystallization easily occurred; in β region the dynamic re-crystallization is obvious at low strain rate and dynamic recovery is obvious at high strain rate.
TA19 alloy; high temperature deformation; flow stress model; microstructure
Chen Wang. Study of the hot deformation behavior in TA19. International Journal of New Developments in Engineering and Society (2018) Vol. 2: 1-3.
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