The influence of ruthenium on structure, corrosion and mechanical properties, and fatigue characteristics of titanium α-alloys in corrosive environment

Investigation of Microstructure and Corrosion Resistance of Ti-Al-V Titanium Alloys Obtained by Spark Plasma Sintering

“…According to [58], the magnitude of the pre-exponential factor D v0 for the diffusion coefficient of carbon 14 C in Ti is 3.02-3.18 cm 2 /s in the temperature range 1223-1923 K (the range of existence of the β-phase). The activation energy Q v in the specified temperature range varies from 79 to 84 kJ/mol (~4.9-5.2 kT m where T m = 1943 K is the melting point of Ti).…”

“…Various methods of deformation treatment (e.g., various severe plastic deformation (SPD) methods) are often applied to improve strength and corrosion resistance of the Ti alloys [10][11][12]. In recent years, modification of the chemical composition of the Ti alloys (e.g., by doping with Pt-group metals) are also applied to improve strength and corrosion resistance of the ones [13,14]. In spite of some success in this area, it is worth mentioning that the possibilities of the expensive doping of the Ti alloys are often limited by economic feasibility.…”

“…Besides, the doping of Ti with the Pt-group metals (Ru, Pt, etc.) doesn't lead to essential improvement of strength often [13,14]. The prospects of application of SPD methods are often limited by possibilities of application of ultrafine-grained (UFG) materials for long-term operation at elevated temperatures.…”

Corrosion Resistance of the Welded Joints From the Ultrafine-Grained Near-α Titanium Alloys Ti-5Al-2V Obtained by Spark Plasma Sintering

“…Enhanced requirements of strength, ductility, fatigue strength, corrosion and radiation resistance, heat resistance, etc. are imposed onto the titanium alloys used in nuclear power engineering [3][4][5][6][7][8][9][10][11].…”

“…HSC results in a severe degradation of the heat-exchange equipment of produced from the titanium -and near- alloys [3,8,10,[54][55][56]. The HSC of the titanium alloys has a complex nature and is a multistage process of fracture, in which the chemical and electrochemical destruction in the conditions of action of elevated temperatures, corrosion-aggressive ambient, aces of oxygen as well as (in some cases) of the action of tensile strain are alternating sequentially [54][55][56].…”