Combustion behaviour and mechanism of TC4 and TC11 alloys

Shao, Lei; Xie, Guoliang; Liu, Xinhua; Wu, Yuan; Yu, Jiabin; Hao, Zifan; Lu, Wanran; Liu, Xiao

doi:10.1016/j.corsci.2020.108564

Cited by 25 publications

(11 citation statements)

References 26 publications

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“…Titanium alloys exhibit higher specific strength, fatigue resistance, good oxidation resistance, and corrosion resistance at moderate temperatures. The titaniumaluminum-vanadium alloy is the most commonly used titanium alloy, and its output accounts for nearly 60 % of the output of titanium alloys [1][2][3][4][5]. However, the application of titanium-aluminum-vanadium alloy in the air is often limited to below 420 °C because of the formation of a porous titanium dioxide layer on the surface of the titanium-aluminum-vanadium alloy at high temperatures, which can't effectively prevent the high-temperature oxidation of the titanium-aluminum-vanadium alloy [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The influence of silicon content on the microstructure and high‐temperature oxidation behavior of aluminum‐silicon coatings on Ti‐6Al‐4 V alloy by hot dipping route

Shi,

Su,

Chen

et al. 2023

Materialwissenschaft Werkst

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The poor high‐temperature oxidation properties of Ti‐6Al‐4 V (titanium‐aluminum‐vanadium) alloy limit its applications under high‐temperature components of aero‐engines. In this study, the aluminum‐silicon coatings with different silicon content were fabricated on titanium‐aluminum‐vanadium alloy via the hot dipping route. A metallurgical bond was established at the interface between aluminum‐silicon coatings and substrates following the hot dipping. The results showed that three different coatings were formed: titanium(aluminum, silicon)3+ liquid‐(aluminum, silicon), titanium(aluminum, silicon)3+ τ2+ liquid‐(aluminum, silicon) and τ1+ τ2+ liquid‐(aluminum, silicon). Furthermore, the formation of aluminum‐silicon coatings was analyzed by diffusion path theory. The coated alloy was subjected to a high‐temperature oxidation test at 850 °C, and the weight gains were only 5.1 % to 22.4 % of the bare alloy. The coatings improved the high‐temperature oxidation resistance of titanium‐aluminum‐vanadium alloy. The most favorable oxidation behavior was noticed for the titanium(aluminum, silicon)3+liquid‐(aluminum, silicon) coatings. The higher the silicon content in titanium(aluminum, silicon)3+liquid‐(aluminum, silicon) coatings, the more excellent high‐temperature oxidation resistance was achieved.

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Section: Introductionmentioning

confidence: 99%

The influence of silicon content on the microstructure and high‐temperature oxidation behavior of aluminum‐silicon coatings on Ti‐6Al‐4 V alloy by hot dipping route

Shi,

Su,

Chen

et al. 2023

Materialwissenschaft Werkst

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“…The morphology and structures of the surface oxides also have an impact on combustion behaviors. Some have also suggested that a succession of oxidation processes between a high valent oxide, such as TiO 2 , and sub-oxides, such as TiO and Ti 2 O 3 , may result in the combustion [10,14].…”

Section: Introductionmentioning

confidence: 99%

“…Many studies on the impact of alloyed elements on the combustion behavior have been conducted to increase the burn-resistance of titanium alloys. Promoted ignition combustion (PIC) methods with varying oxygen pressure and contents have been used to quantitatively study the combustion behavior of the TC4 (Ti-6Al-4V), TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si), and Ti 2 AlNb alloys [14][15][16]. The combustion velocity of TC4 is higher than that of TC11, which is attributed to the enriched distribution alloying elements close to the interface of the melting zone and matrix, i.e., V for the TC4 alloy and Mo, Zr, and Si for the TC11 alloy [14].…”

Section: Introductionmentioning

confidence: 99%

“…Promoted ignition combustion (PIC) methods with varying oxygen pressure and contents have been used to quantitatively study the combustion behavior of the TC4 (Ti-6Al-4V), TC11 (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si), and Ti 2 AlNb alloys [14][15][16]. The combustion velocity of TC4 is higher than that of TC11, which is attributed to the enriched distribution alloying elements close to the interface of the melting zone and matrix, i.e., V for the TC4 alloy and Mo, Zr, and Si for the TC11 alloy [14]. It has also been reported that the Al and V alloying elements in TC4 alloy cannot prevent the oxygen diffusion into the alloy matrix during the combustion process [17].…”

Section: Introductionmentioning

confidence: 99%

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Combustion Behavior and Microstructure of TC17 Titanium Alloy under Oxygen-Enriched Atmosphere

Zhang,

Xing,

et al. 2023

Metals

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TC17 titanium alloy is widely used in the aerospace industry, but its combustion behavior and microstructure after combustion are rarely investigated. Herein, the ignition critical oxygen pressure, combustion velocity, and microstructure after the combustion of TC17 titanium alloy were investigated by promoted ignition combustion tests under an oxygen-enriched environment. The results indicated that there were three stages, ignition, splash, and flame propagation, for the combustion process of the TC17 alloy. As compared to TC11 titanium alloy, the TC17 titanium alloy exhibited a similar ignition critical oxygen pressure with the same size, but an obviously faster burning rate, which followed a power law relationship with the oxygen pressure. The segregation of Cr, Mo, and Al was observed in the interdendritic phase of the melting zone and the interface between the melting zone and the heat-affected zone. The segregation of Cr at the liquid/solid interface can be responsible for accelerating the burning kinetic of the TC17 alloy by decreasing the interfacial temperature.

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“…However, the literature has reported that these Ti alloy components experienced prominent oxidation erosion during high-temperature air exposure [10][11][12][13]. In addition, the literature reported that these components also suffered from severe simultaneous oxidation and degradation reactions during marine environment exposure (e.g., hot salt or hot salt-water vapor) [14][15][16][17][18]. The strong synergistic damage of the oxidation and degradation reactions greatly threatens the long-term service life of these hot end components.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Degradation Behaviors of Ti6Al4V Alloys in Simulated Marine Environments

et al. 2022

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Detailed tests and characterizations were used to investigate the corrosion degradation behaviors of Ti6Al4V alloys in simulated marine environments. These alloys suffered from very slight pitting and a miniscule weight loss of 0.018 mg/cm2 during the 50 cycle salt spray exposure but experienced significant oxygen erosion in the high-temperature oxidation test, resulting in a high weight gain of 2.657 mg/cm2 at 400 h. The oxidation and degradation reactions simultaneously occurred during the high-temperature hot salt test. The chlorine (Cl2) induced by the eutectic reaction of the mixed salts accelerated the degradation of the substrate and led to a higher weight gain of 4.265 mg/cm2 at 400 h. In contrast, this alloy suffered from severe corrosion damage during the high-temperature hot salt–water vapor synergy test. The degradation of TiO2, Al2O3, and V2O5 was aggravated by the synergistic action of chlorine salt and water. The reaction forming hydrochloric acid (HCl) further degraded the matrix metal and consequently led to a high weight loss of 16.358 mg/cm2 at 400 h. These current findings provide a comprehensive understanding for the degradation mechanisms of Ti alloys in these specific marine environments.

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Combustion behaviour and mechanism of TC4 and TC11 alloys

Cited by 25 publications

References 26 publications

The influence of silicon content on the microstructure and high‐temperature oxidation behavior of aluminum‐silicon coatings on Ti‐6Al‐4 V alloy by hot dipping route

The influence of silicon content on the microstructure and high‐temperature oxidation behavior of aluminum‐silicon coatings on Ti‐6Al‐4 V alloy by hot dipping route

Combustion Behavior and Microstructure of TC17 Titanium Alloy under Oxygen-Enriched Atmosphere

Corrosion Degradation Behaviors of Ti6Al4V Alloys in Simulated Marine Environments

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