Microstructures of a burn resistant highly stabilized β-titanium alloy

Zhang, Yongqing; Zhu, Kai; Qu, Heng Lei; Wu, Huan; Zhou, Lian; Zhou, Yigang; Zeng, Weidong

doi:10.1016/s0921-5093(99)00761-3

Cited by 31 publications

(14 citation statements)

References 6 publications

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“…On the basis of the four aforementioned burn factors and the results of the analysis during the burning process of titanium alloy, two burn-resistant mechanisms were proposed for the burn-resistant behavior of Ti-V-Cr alloy [8][9]. One was the rapid heat dissipation mechanism, which involved avoiding the ignition point of the matrix by rapidly distributing igniting heat.…”

Section: Burn-resistant Mechanism Of Ti14 Alloymentioning

confidence: 99%

“…Ti40 and Ti14 alloys have been independently researched and developed in China. The burn-resistant behavior of Ti40 has been previously investigated through the direct-current simulation burning (DCSB) method [8][9][10][11], and the burning oxidation behavior and burn-resistant mechanism of this alloy have been also discussed. In the DCSB method, titanium is ignited for a certain time under a certain direct current, and the burn resistance is represented by the burning velocity (percentage of weight loss and/or percentage of height reduction per unit time); this method provides more accurate control than the metal droplet method (MDM) [12] and the equal friction method (EFM), where the burn resistance is represented by an area burning rate.…”

Section: Introductionmentioning

confidence: 99%

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Burn-resistant behavior and mechanism of Ti14 alloy

Chen

Huo

Song

et al. 2016

Int J Miner Metall Mater

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The direct-current simulation burning method was used to investigate the burn-resistant behavior of Ti14 titanium alloy. The results show that Ti14 alloy exhibits a better burn resistance than TC4 alloy (Ti-6Al-4V). Cu is observed to preferentially migrate to the surface of Ti14 alloy during the burning reaction, and the burned product contains Cu, Cu 2 O, and TiO 2 . An oxide layer mainly comprising loose TiO 2 is observed beneath the burned product. Meanwhile, Ti 2 Cu precipitates at grain boundaries near the interface of the oxide layer, preventing the contact between O 2 and Ti and forming a rapid diffusion layer near the matrix interface. Consequently, a multiple-layer structure with a Cu-enriched layer (burned product)/Cu-lean layer (oxide layer)/Cu-enriched layer (rapid diffusion layer) configuration is formed in the burn heat-affected zone of Ti14 alloy; this multiple-layer structure is beneficial for preventing O 2 diffusion. Furthermore, although Al can migrate to form Al 2 O 3 on the surface of TC4 alloy, the burn-resistant ability of TC4 is unimproved because the Al 2 O 3 is discontinuous and not present in sufficient quantity.

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Section: Burn-resistant Mechanism Of Ti14 Alloymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Burn-resistant behavior and mechanism of Ti14 alloy

Chen

Huo

Song

et al. 2016

Int J Miner Metall Mater

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“…At elevated temperatures and in a high-pressure air environment, this can lead to a very rapid oxidation of the titanium. The oxidation process, which is exothermic, can become self-propagating and cause the burning of the titanium (Leyens, and Peters, 2003); Zhao et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Niobium coated Ti-Al alloy: improvement of tribological behaviour, oxidation resistance and flame retardancy

et al. 2016

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Double glow plasma (DGP) coatings were recommend for metallic components to mitigate the damage induced by complex working conditions. In this paper, A Ti-Al alloy was coated with niobium (Nb) via a DGP process to enhance its anti-oxidation properties, wear resistance and flame retardancy. The results showed that the Nb-coated Ti-Al alloy mainly comprised Nb, AlNb2, AlMoTiβ and -Ti phases. Room temperature sliding-friction tests indicated that the Nb-coated Ti-Al alloy exhibited a stable friction coefficient of an average value of 0.25, whilst the same value for via the uncoated Ti-Al alloy was around 0.45. High-temperature oxidation tests revealed compact oxide grains without cracks after the 100 h test, indicating good oxidation resistance. An ablation test showed that the Nb-coated Ti-Al alloy exhibited excellent flame retardancy, with the ablation time of the Nb-coated Ti-Al alloy at 1.62 times that of the uncoated Ti-Al base alloy. The alloy's tribological behaviour, oxidation resistance and flame retardancy mechanisms are discussed in detail in this paper.

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“…Ti40 alloy was developed for burn-resistant purpose for aircraft engine 10 years ago. Although several researches on burn-resistant mechanism [8][9], oxidation [10], microstructures [11], and mechanical properties [12] have been done all these years, the study on the fatigue crack growth behavior still keeps lacking. Considering the work conditions the Ti40 alloy is designed for, the reciprocal effect of temperature and frequency on fatigue crack behavior of Ti40 alloy should be studied.…”

Section: Introductionmentioning

confidence: 99%

Fatigue crack growth behaviors of a new burn-resistant highly-stabilized beta titanium alloy

Zhang

Zeng

et al. 2009

Rare Metals

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This article presents the fatigue crack growth (FCG) behaviors of a new burn-resistant highly-stabilized beta Ti40 alloy. The FCG rates were analyzed. The fracture surfaces and the side surfaces of the test samples were explored. The results show that frequency affects the cracking behaviors of Ti40 alloy. Temperature also plays an important role in Ti40 alloy cracking. At room temperature (25°C), when the frequency increases, the cracking rate changes a little in the range of low stress intensity factor (ΔK), while it changes significantly when ΔK is high. At 500°C, the cracking rate of Ti40 alloy changes significantly during all the course of cracking. The frequency also affects the microstructure patterns of Ti40 alloy. A number of secondary cracks appear in the area more than 200 μm from the main crack at a high ΔK when the frequency is 1 Hz, but only a few secondary cracks exist when the frequency is 10 Hz. Facet image is the main image of the fracture surfaces when the frequency is 1 Hz. While, ductile striation occupies most of the area of fracture surfaces when the frequency is 10 Hz.

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Microstructures of a burn resistant highly stabilized β-titanium alloy

Cited by 31 publications

References 6 publications

Burn-resistant behavior and mechanism of Ti14 alloy

Burn-resistant behavior and mechanism of Ti14 alloy

Niobium coated Ti-Al alloy: improvement of tribological behaviour, oxidation resistance and flame retardancy

Fatigue crack growth behaviors of a new burn-resistant highly-stabilized beta titanium alloy

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