Effect of quenching temperature on structure and properties of titanium alloy: Physicomechanical properties

• Published in: Physics of metals and metallography 2014-05, Vol.115 (5), p.517-522
• Main Authors: Popov, A. A., Illarionov, A. G., Stepanov, S. I., Ivasishin, O. M.
• Format: Article
• Language: English
• Subjects: Analysis; Chemistry and Materials Science; Diffraction; Heating; Materials Science; Mechanical analysis; Metallic Materials; Modulus of elasticity; Optical microscopy; Phase transformations; Quenching; Strength and Plasticity; Titanium; Titanium alloys; Titanium base alloys; X-rays
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X1405007X

Regularities of the formation of physicomechanical properties of the VT16 alloy (Ti-3.33Al-5.18Mo-4.57V, wt %) quenched after furnace and rapid heating have been established using optical microscopy, X-ray diffraction (XRD), and dynamic mechanical analysis. It has been shown that changes in the modulus of elasticity of the VT16 alloy correlate with a decrease in the volume fraction of the α phase in the structure, except for a slight increase in the modulus of elasticity (related to the presence of the ω phase) in the case when quenching temperatures of 800–825°C were used. It has been found that the use of rapid heating to the quenching temperature leads to an increase in the temperature of the alloy transition into the single-phase β state, hampers grain growth during heating for quenching at temperatures close to the polymorphic-transition temperature, and creates conditions for more efficient strengthening in the course of subsequent aging.