Highly oxidation-resistant Ti-Mo alloy with two-scale network Ti5Si3 reinforcement

Lü, Qianqian; Lv, Yaozha; Zhang, Chi; Hong-bo, Zhang; Chen, Wei; Xu, Zhanyuan; Feng, Peizhong; Fan, Jinglian

doi:10.1016/j.jmst.2021.08.072

Journal of Materials Science & Technology

2022

DOI: 10.1016/j.jmst.2021.08.072

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Highly oxidation-resistant Ti-Mo alloy with two-scale network Ti5Si3 reinforcement

Qianqian Lü

Yaozha Lv

Chi Zhang

et al.

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Cited by 15 publications

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“…Figure3depicts the XRD patterns of Si-TC4 overlay coatings at various powder feeding rates. It can be seen that the composite coating is mainly composed of α-Ti (PDF#44-1294) and Ti 5 Si 3 (PDF#29-1362)[36]. The emergence of Ti 5 Si 3 diffraction peaks in the composite indicates that the presence of the Si element led to a reaction with the Ti element in the molten pool, leading to the formation of Ti 5 Si 3 .…”

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Microstructure and Wear Resistance of Si-TC4 Composite Coatings by High-Speed Wire-Powder Laser Cladding

Men,

Sun,

et al. 2024

Materials

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The hardness and wear resistance of the surface of TC4 titanium alloy, which is widely used in aerospace and other fields, need to be improved urgently. Considering the economy, environmental friendliness, and high efficiency, Si-reinforced Ti-based composite coatings were deposited on the TC4 surface by the high-speed wire-powder laser cladding method, which combines the paraxial feeding of TC4 wires with the coaxial feeding of Si powders. The microstructures and wear resistance of the coatings were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), Vickers hardness tester, and friction and wear tester. The results indicate that the primary composition of the coating consisted of α-Ti and Ti5Si3. The microstructure of the coating underwent a notable transformation process from dendritic to petal, bar, and block shapes as the powder feeding speed increased. The hardness of the composite coatings increased with the increasing Si powder feeding rate, and the average hardness of the composite coating was 909HV0.2 when the feeding rate reached 13.53 g/min. The enhancement of the microhardness of the coatings can be attributed primarily to the reinforcing effect of the second phase generated by Ti5Si3 in various forms within the coatings. As the powder feeding speed increased, the wear resistance initially improved before deteriorating. The optimal wear resistance of the coating was achieved at a powder feeding rate of 6.88 g/min (wear loss of 2.55 mg and friction coefficient of 0.12). The main wear mechanism for coatings was abrasive wear.

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Microstructure and Wear Resistance of Si-TC4 Composite Coatings by High-Speed Wire-Powder Laser Cladding

Men,

Sun,

et al. 2024

Materials

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Oxidation Behavior of Silicon-Aluminizing Coating on γ-TiAl Alloy at Different Temperatures

Zhao

Huang

Cui

et al. 2023

J. of Materi Eng and Perform

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Effect of minor Sc modification on the high-temperature oxidation behavior of near-α Ti alloy

et al. 2023

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Highly oxidation-resistant Ti-Mo alloy with two-scale network Ti5Si3 reinforcement

Cited by 15 publications

References 59 publications

Microstructure and Wear Resistance of Si-TC4 Composite Coatings by High-Speed Wire-Powder Laser Cladding

Microstructure and Wear Resistance of Si-TC4 Composite Coatings by High-Speed Wire-Powder Laser Cladding

Oxidation Behavior of Silicon-Aluminizing Coating on γ-TiAl Alloy at Different Temperatures

Effect of minor Sc modification on the high-temperature oxidation behavior of near-α Ti alloy

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