Kinetic laws of the high-temperature oxidation of commercial titanium alloys

1987 ◽  
Vol 22 (6) ◽  
pp. 614-618
Author(s):  
G. G. Maksimovich ◽  
V. N. Fedirko ◽  
A. T. Lizun
Keyword(s):  
High Temperature ◽  
Titanium Alloys ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Commercial Titanium

scholarly journals HIGH TEMPERATURE OXIDATION OF TI-6AL-4V ALLOY FABRICATED BY ADDITIVE MANUFACTURING. INFLUENCE ON MECHANICAL PROPERTIES

2020 ◽  
Vol 321 ◽  
pp. 03006
Author(s):  
Antoine CASADEBAIGT ◽  
Daniel MONCEAU ◽  
Jonathan HUGUES
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Additive Manufacturing ◽  
Titanium Alloys ◽  
Oxidation Kinetics ◽  
High Temperature Oxidation ◽  
Effect Of Temperature ◽  
Premature Failure ◽  
Temperature Oxidation

Titanium alloys, such as Ti-6Al-4V alloy, fabricated by additive manufacturing processes is a winning combination in the aeronautic field. Indeed, the high specific mechanical properties of titanium alloys with the optimized design of parts allowed by additive manufacturing should allow aircraft weight reduction. But, the long term use of Ti-6Al-4V alloy is limited to 315 °C due to high oxidation kinetics above this temperature [1]. The formation of an oxygen diffusion zone in the metal and an oxide layer above it may reduce the durability of titanium parts leading to premature failure [2, 3]. In this study, Ti-6Al-4V alloy was fabricated by Electron Beam Melting (EBM). As built microstructure evolutions after Hot Isostatic Pressure (HIP) treatment at 920 °C and 1000 bar for 2h were investigated. As built microstructure of Ti-6Al-4V fabricated by EBM was composed of Ti-α laths in a Ti-β matrix. High temperature oxidation of Ti-6Al-4V alloy at 600 °C of as-built and HIP-ed microstructures was studied. This temperature was chosen to increase oxidation kinetics and to study the influence of oxidation on tensile mechanical properties. In parallel, two other oxidation temperatures, i.e. 500 °C and 550°C allowed to access to the effect of temperature on long-term oxidation.

Performance of TC4 Titanium Alloys Coated with Different Sol

2009 ◽  
Vol 75 ◽  
pp. 67-70
Author(s):  
Hui Cong Liu ◽  
Li Qun Zhu ◽  
Wei Ping Li
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Titanium Alloys ◽  
Oxidation Resistance ◽  
Anodic Oxidation ◽  
High Temperature Oxidation ◽  
The Other ◽  
Temperature Oxidation ◽  
Insulation Effect ◽  
Zro2 Sol

Titanium alloys has been widely used in many fields, while in high temperature and rigorous corrosive environment, it is very necessary to do some work on the surface of titanium alloys to satisfy with application purpose. In this paper, four kinds of sol film were prepared on titanium alloys with and without anodic oxidation film. The prepared sol included Al2O3, Al2O3-ZrO2 and doped sol by adding additive into them respectively. The film thickness, high temperature oxidation resistance and corrosion resistance after high temperature oxidation for some time were investigated. The results show that the sol film obtained on the anodic oxidation film of titanium alloys is thicker than that without anodic oxidation film. Compared with the other three kinds of film, the doped Al2O3-ZrO2 sol film has the best high temperature oxidation resistance and corrosion resistance due to insulation effect of the sol film, and the composition of additive and zirconic.

Effect of Silicon Sol on Anodic Oxidation Film of Titanium Alloys

2009 ◽  
Vol 75 ◽  
pp. 63-66
Author(s):  
Hui Cong Liu ◽  
Li Qun Zhu ◽  
Wei Ping Li
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Film Thickness ◽  
Titanium Alloys ◽  
Oxidation Resistance ◽  
Anodic Oxidation ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Percentage Difference ◽  
Silicon Sol

In this paper, the anodic oxidation film was prepared in the 1~3mol/L NaAlO2 solution with and without silicon sol added. The film thickness, high temperature oxidation resistance, corrosion resistance, and SEM image, element composition in the film were investigated. The results show that there were obvious improvement in high temperature oxidation resistance and corrosion resistance of the film on titanium alloys after adding silicon sol into the NaAlO2 solution, and with the sol percentage in the solution increased, the foregoing protection abilities of the anodic oxidation film became better, while the film thickness was little affected with the sol percentage difference. The reason was discussed and the effective factor was the silicon composition and more even and compact image in the film.

Determining High-Temperature Oxidation Resistance of Ti-Al-Cr-Si-N Based Nitride Thin Coatings Deposited on Titanium Alloys

2020 ◽  
Vol 1013 ◽  
pp. 41-45
Author(s):  
Konstantins Savkovs ◽  
Darja Andrejeva
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Heat Resistance ◽  
Titanium Alloys ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Main Element ◽  
Temperature Oxidation ◽  
Thin Coatings

This article considers the possibility of applying thin Ti-Al-Cr-Si-N based nitride thin coatings (up to 10 microns) for increasing the heat-resistance of titanium alloy blades without altering their aerofoil. It presents the results of testing samples, which were coated by using different ratios of the parameters of main element deposition simultaneously from various sputtering sources, as well as an assessment of the efficiency of these coatings in terms of oxidation at temperatures of 750–850°С.

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