Thermal Deformation Behavior of a New Metastable Beta Titanium Alloy

Abstract:

The thermal deformation behavior of a new metastable beta titanium alloy composed of Ti-Al-Mo-V-Nb-Cr was studied under different experimental conditions of varying temperatures (760°C~ 970°C) and strain rates (0.001s⁻¹, 0.01s⁻¹, 0.1s⁻¹, 1s⁻¹ and 10s⁻¹) up to deformation amount of 60%. The hot compression experiments were completed on a Gleeble-3500 thermal analogue. The experimental results showed that the true stress of the Ti-Al-Mo-V-Nb-Cr titanium alloy decreased with increasing the temperature and decreasing the strain rate, the stress peaks and the steady-state stress values were higher with the decreasing of temperature at the same strain rate. The calculated values of the deformation activation energy were 187.87 kJ/mol in the two-phase region and 165.17kJ/mol in beta single-phase region. The corresponding constitutive equation was determined by the multiple linear regression calculation on the hot compression experimental data, on the base of Arrhenius equations.

• Periodical: Materials Science Forum (Volume 1035)
• Pages: 32-38
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1035.32
• Online since: June 2021
• Authors: Jing Li, Xin Nan Wang, Zhi Shou Zhu*
• Keywords: Constitutive Equation, Hot Compression Behavior, Ti-Al-Mo-V-Nb -Cr Alloy

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