Direct Laser Fabrication of Ti-25V-15Cr-2Al-0.2C (wt pct) Burn-Resistant Titanium Alloy

Wang, Fude

doi:10.1007/s11661-011-0883-9

Cited by 10 publications

(11 citation statements)

References 11 publications

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“…(3) Because of its low melting point, the Ti 2 Cu phase first transformed to a liquid phase on the burn surface [13][14][15][16], which caused a lubricating effect during the dramatic impact and/or high-speed friction and reduced the possibility of "titanium fire". In addition, the Ti14 alloy exhibited a low melting point, a low heat of oxidation, a high expansion coefficient, and high thermal conductivity, which caused a rapid heat dissipation effect and resulted in a lower burn capacity compared with those of conventional titanium alloys.…”

Section: Burn-resistant Mechanism Of Ti14 Alloymentioning

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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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%

Burn-resistant behavior and mechanism of Ti14 alloy

Chen

Huo

Song

et al. 2016

Int J Miner Metall Mater

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“…Other techniques include electroplating, high-energy mechanical alloying, friction stir machining, and similar methods. Laser cladding [13,14], laser solid forming [15,16], and direct laser fabrication [17][18][19][20][21] were used to prepare burn-resistant coating on the surface of Ti alloys. The related deposition principle is similar (Figure 1), which implies that the surface of the base material is irradiated using different fillers in order to make the deposit and the thin layer of the base material melt simultaneously.…”

Section: Burn Resistant Surface Technologies Of Ti Alloysmentioning

confidence: 99%

“…Further, after rapid solidification, a deposited layer that is metallurgically combined with the base material is formed. The Ti-based burnresistant coating prepared using the laser technology is mostly burn resistant β-Ti-V-Cr alloys, which include Ti-25V-15Cr [16,17], Ti-25V-15Cr-0.2Si [14], Ti-35V-15Cr [15], and Ti-25V-15Cr-2Al-0.2C coatings [18][19][20][21]. that combustion always originates from the surface, various surface technologies have been proposed to improve the burn-resistance of Ti alloys.…”

Section: Burn Resistant Surface Technologies Of Ti Alloysmentioning

confidence: 99%

Perspectives on Developing Burn Resistant Titanium Based Coatings—An Opportunity for Cold Spraying

Liang,

Tang,

Wang

et al. 2023

Materials

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Titanium alloys are crucial lightweight materials; however, they are susceptible to spontaneous combustion under high-temperature and high-pressure conditions, limiting their widespread use in aerospace engines. Improving the burn resistance of Ti alloys is essential for the structural safety and lightweight of aerospace equipment. Burn-resistant Ti alloys, such as Ti-V-Cr and Ti-Cu, however, face limitations such as high cost and low specific strength. Surface coatings provide a cost-effective solution while maintaining the high specific strength and good processability of the base material. Conventional surface treatments, such as laser cladding, result in defects and deformation of thin-walled parts. Cold spray technology offers a promising solution, as it uses kinetic energy to deposit coatings at low temperatures, avoiding defects and deformation. In this paper, we review the current research on burn-resistant surface technologies of Ti alloys and propose a new method of bimetallic coating by cold spraying and low-temperature heat treatment, which has the potential to solve the problem of spontaneous combustion of aerospace engine parts. The strategy presented can also guide the development of high-performance intermetallic compound-strengthened metal matrix composite coatings.

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“…In addition, they deposited multiple layers of Ti-25V-15Cr-2Al-0.2C alloy on the surface of Ti-11Sn-5Zr-2.25Al-0.25Si alloy and studied their microstructure and mechanical properties. [23] The current research team investigated the influence of processing parameters on the phase morphologies of LSF-produced Ti-25V-15Cr alloy and found that the microstructure of this flame-resistant titanium alloy is relatively sensitive to the processing parameters. [24] It was also found that the dendritic structures and subgrains formed in local areas in LSF-produced Ti-25V-15Cr alloy enhanced the diffusion ability of V and Cr elements under heating conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al built a gradient composition sample, which was obtained by the transition from Ti–6Al–4V to Ti–25V–15Cr–2Al–0.2C and then analyzed the microstructural evolution of the deposited samples. In addition, they deposited multiple layers of Ti–25V–15Cr–2Al–0.2C alloy on the surface of Ti–11Sn–5Zr–2.25Al–0.25Si alloy and studied their microstructure and mechanical properties . The current research team investigated the influence of processing parameters on the phase morphologies of LSF‐produced Ti–25V–15Cr alloy and found that the microstructure of this flame‐resistant titanium alloy is relatively sensitive to the processing parameters .…”

Section: Introductionmentioning

confidence: 99%

Solidification Effect on the Microstructure and Mechanism of Laser‐Solid‐Forming‐Produced Flame‐Resistant Ti–35V–15Cr Alloy

Tan

Wang

et al. 2020

Adv Eng Mater

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Ti–35V–15Cr alloy has become an indispensable material in aerospace industry due to its excellent flame‐resistance properties. Herein, the block and thin‐wall Ti–35V–15Cr samples are built by laser solid forming (LSF) under the same processing parameters, and the evolution of solidification microstructure is investigated. This work focused on the effect of molten pool solidification parameters and complex thermal cycling conditions on the morphology of β grains and the substructure in the grains. The microstructure of LSF‐produced Ti–35V–15Cr block sample mainly consists of epitaxial columnar dendritic grains, whereas that of the deposited thin‐wall sample is mainly composed of near‐equiaxed grains together with subgrains formed in the near‐equiaxed grains. Such different microstructure results from extremely sensitive thermal behavior condition in LSF process. The simulated thermal behavior characteristics using finite element method illustrate that the thermal cycles during block deposition are very complex and the temperature gradient at the last solidification in block deposition is much higher than that in the deposition of thin‐wall samples, resulting in significantly different solidification microstructure between thin‐wall and block samples.

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Direct Laser Fabrication of Ti-25V-15Cr-2Al-0.2C (wt pct) Burn-Resistant Titanium Alloy

Cited by 10 publications

References 11 publications

Burn-resistant behavior and mechanism of Ti14 alloy

Burn-resistant behavior and mechanism of Ti14 alloy

Perspectives on Developing Burn Resistant Titanium Based Coatings—An Opportunity for Cold Spraying

Solidification Effect on the Microstructure and Mechanism of Laser‐Solid‐Forming‐Produced Flame‐Resistant Ti–35V–15Cr Alloy

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