Oxidation behaviors of TA15 titanium alloy and TiBw reinforced TA15 matrix composites prepared by spark plasma sintering

Wang, Dongjun; Li, Hao; Zheng, Wei

doi:10.1016/j.jmst.2019.07.037

Cited by 38 publications

(6 citation statements)

References 30 publications

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“…The Figure 11 shows the XRD of the sample surface after mechanical grinding and laser cleaning at different heating times. The peaks of anatase-TiO 2 , rutile-TiO 2 , Ti, Ti 2 O 3 and TiO mainly exist on the TA15 titanium alloy surface after removing the original oxide film [13,30]. There is a small amount of aluminum oxide on the surface, and the diffraction peak of aluminum oxide is obviously increased on the sample surface with the increase of heating time, and the anatase phase transformed into rutile titanium dioxide with increasing treatment time.…”

Section: Xrd Analysesmentioning

confidence: 98%

“…Therefore, the high-temperature oxide film thickness after mechanical grinding is greater than that after laser cleaning. After laser cleaning, aluminum in titanium alloy will be more easily enriched or form nano scale alumina film under the residual heat of the laser [16], and aluminum is more active than titanium and it is easy to form alumina on the upper surface [13,25]. Therefore, the surface after laser cleaning will inhibit the further oxidation of titanium alloy.…”

Section: Section Analysesmentioning

confidence: 99%

“…Soon Yong Park [12] proved Al, Nb and Si to increase the oxidation resistance of Ti-44Al-6Nb-2Cr-0.3Si-0.1C alloy, and Nb, Cr and Si have tended to segregate the oxide scale-matrix interface. Dongjun Wang [13] investigated the oxidation behaviors of the TA15 titanium alloy and TiBw/TA15 composite in the temperature range of 873-1073 K, and TiBw/TA15 composite exhibited a higher oxidation resistance than TA15. It is of great significance to study the oxidation properties of titanium alloy for its subsequent application.…”

Section: Introductionmentioning

confidence: 99%

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High-Temperature Oxidation Behaviors of TA15 Titanium Alloy after Mechanical Grinding and Laser Cleaning

Zhang

et al. 2021

Coatings

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This paper presents the results of a study on the high-temperature oxidation characteristics after mechanical and laser removal of TA15 titanium alloy oxide film. The morphology, components, and roughness of the surface were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and laser confocal microscope (OM). The oxide film can be effectively removed with mechanical grinding and laser cleaning, and the oxide film after mechanical grinding is thicker and looser than that of after laser cleaning. The oxide film is principally composed of TiO2, Ti2O3 and TiO. Besides, there is a small amount of aluminum oxide on the surface. The surface after mechanical grinding was rougher than that of after laser cleaning. Thus, this work indicates that laser can not only clean the oxide film completely, but also strengthen the surface, which is a promising way to favor the widespread application of laser cleaning technology.

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Section: Xrd Analysesmentioning

confidence: 98%

Section: Section Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Temperature Oxidation Behaviors of TA15 Titanium Alloy after Mechanical Grinding and Laser Cleaning

Zhang

et al. 2021

Coatings

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“…This led to the external cracking observed in Figure 5c. Figure 6b shows the oxide thickness with an average thickness of 127.75 µm after 120 h. A new oxide layer was in the process of developing after the cracking of the initial layer at t > 72 h. the iron oxide scale is made up of FeO (wüstite), Fe3O4 (magnetite) and Fe2O3 hematite), respectively, in that order of formation on the substrate [25,26]. Further, an EDS line scan was carried out as shown in Figure 8 in the region marked 'oxide region' to gain more understanding of the T-800/WC coating oxide (Figure A2 shows an exploded view of the EDS).…”

Section: Surface Morphology Of the Uncoated En8 Substratementioning

confidence: 99%

Isothermal Oxidation Performance of Laser Cladding Assisted with Preheat (LCAP) Tribaloy T-800 Composite Coatings Deposited on EN8

2021

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It is anticipated that laser cladding assisted with preheat (LCAP)-deposited Tribaloy (T-800) composite coatings enhances resistance to structural degradation upon exposure to elevated-temperature oxidation service environments. The oxidation kinetics of LCAP T-800 composite coatings deposited on EN8 substrate and its mechanisms have not been explored in severe conditions that are similar to operational parameters. The isothermal oxidation behaviour of the T-800 composite coating deposited on EN8 via LCAP was studied at 800 °C in air for up to 120 h (5 × 24 h cycles) and contrasted to that of uncoated samples. The mass gain per unit area of the coating was eight times less than that of the uncoated EN8 substrate. The parabolic rate constant (Kp) for EN8 was 6.72 × 10−12 g2·cm−4·s−1, whilst that for the T-800 composite coating was 8.1 × 10−13 g2·cm−4·s−1. This was attributed to a stable chromium oxide (Cr2O3) layer that formed on the coating surface, thereby preventing further oxidation, whilst the iron oxide film that formed on the EN8 substrate allowed the permeation of the oxygen ions into the oxide. The iron oxide (Fe2O3) film that developed on EN8 spalled, as evidenced by the cracking of oxide when the oxidation time was greater than 72 h, whilst the Cr2O3 film maintained its integrity up to 120 h. A parabolic law was observed by the T-800 composite coating, whilst a paralinear law was reported for EN8 at 800 °C up to 120 h. This coating can be used in turbine parts where temperatures are <800 °C.

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“…TA15 (Ti-6Al-2Zr-1Mo-1V) is a near-α-type titanium alloy which has both the good thermal strength and weldability of α-type titanium alloy and the process plasticity of α-β-type titanium alloy. It has been widely used in aerospace, bearing parts, and engine structures because of its high-temperature performance, fracture toughness, and corrosion resistance [1][2][3]. However, owing to the high activity, deformation resistance, and low thermal conductivity of titanium alloys, the traditional melt casting and welding methods have some shortcomings, such as high equipment requirements, complex processes, low material utilization rates, and long production cycles, etc., making it difficult to prepare TA15 titanium alloy structural parts with complex shapes and structures [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and Aging

Wang,

Jin,

Zhao

et al. 2023

Metals

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In this study, TA15 titanium alloys were successfully prepared using selective laser melting (SLM). The results show that the microstructure of each TA15 specimen is composed of a large number of acicular α’ martensite crystals accompanied by a lot of dislocations and twin structures in the martensite due to non-equilibrium heating and cooling via SLM. After solution treatment and aging treatment, the martensite structure is successfully transformed into a typical duplex structure and an equiaxial structure. When there is an increase in the solution temperature, the size of the equiaxed primary α phase and the elongation of the specimen gradually increases, while the thickness of the layered secondary α phase and the tensile strength of the specimen decreases accordingly. After solution treatment at 1000 °C, the specimens show the best comprehensive mechanical properties, i.e., a high-temperature tensile strength of 715 MPa and a corresponding elongation of 24.5%. Subsequently, an appropriate solution–aging treatment is proposed to improve the high-temperature mechanical properties of SLMed TA15 titanium alloys in aerospace.

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Oxidation behaviors of TA15 titanium alloy and TiBw reinforced TA15 matrix composites prepared by spark plasma sintering

Cited by 38 publications

References 30 publications

High-Temperature Oxidation Behaviors of TA15 Titanium Alloy after Mechanical Grinding and Laser Cleaning

High-Temperature Oxidation Behaviors of TA15 Titanium Alloy after Mechanical Grinding and Laser Cleaning

Isothermal Oxidation Performance of Laser Cladding Assisted with Preheat (LCAP) Tribaloy T-800 Composite Coatings Deposited on EN8

Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and Aging

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