Characterization of Hot Deformation Behavior of Ti-Al-Nb-Zr-Mo-Cr Alloy

Abstract:

The hot deformation behavior of Ti-Al-Nb-Zr-Mo-Cr titanium alloy has been investigated using a Gleeble-1500D thermal simulation test machine in the temperature range of 855°C~1015°C,at constant strain rate from 0.01 s^-1 to 10s^-1 and with height reduction of 45%. The flow curves characteristic under different deformation parameters show significant difference. According to the stress-strain curves of the alloy and its stress characteristics, the Arrhenius constitutive equation was obtained. The average activation energy is about 541 kJ/mol in the α+β field, and about 243 kJ/mol in the β field, respectively. Based on the dynamic materials model, the processing map is generated, which shows that the peak efficiency domain appears at the temperature of 874°C~900°C and the strain rate of 0.001 s^-1~0.06s^-1 with a peak efficiency of 0.58 at about 887°C/0.001s^-1.

• Periodical: Materials Science Forum (Volume 1035)
• Pages: 328-333
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1035.328
• Online since: June 2021
• Authors: Li Wei Zhu, Zhi Shou Zhu*, Xin Nan Wang
• Keywords: Constitutive Equation, Hot Deformation, Processing Map, Ti-Al-Nb-Zr-Mo-Cr Alloy, Titanium Alloy

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