Structure and properties of titanium surface layers after electron beam alloying with powder mixtures containing carbon

Lenivtseva, O G; Батаев, И. А.; Голковский, М. Г.; Батаев, А. А.; Samoilenko, V. V.; Plotnikova, N. V.

doi:10.1016/j.apsusc.2015.07.043

Cited by 22 publications

(4 citation statements)

References 25 publications

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“…Bataev et al [43] prepared a Ti 3 Al layer on a CP-Ti plate by EBC, which increased the microhardness to 540-610 HV 1 and obtained better sliding wear resistance and fixed abrasive friction. Lenivtseva et al [44] fabricated a ceramic reinforced composite layer on a CP-Ti surface by EBC with 50 wt% TiC + 50 wt% CaF 2 and 40 wt% Ti + 10 wt% graphite + 50 wt% CaF 2 mixed powders. The results revealed that the powders with relative high melting points could be well dispersed in the cladding layer and have a good phase interface.…”

Section: Electron Beam Claddingmentioning

confidence: 99%

Research Progress of Laser Cladding on the Surface of Titanium and Its Alloys

Zhao

Xie

et al. 2023

Materials

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Titanium (Ti) and its alloys have been widely employed in aeronautical, petrochemical, and medical fields owing to their fascinating advantages in terms of their mechanical properties, corrosion resistance, biocompatibility, and so on. However, Ti and its alloys face many challenges, if they work in severe or more complex environments. The surface is always the origin of failure for Ti and its alloys in workpieces, which influences performance degradation and service life. To improve the properties and function, surface modification becomes the common process for Ti and its alloys. The present article reviews the technology and development of laser cladding on Ti and its alloys, according to the cladding technology, cladding materials, and coating function. Generally, the laser cladding parameters and auxiliary technology could influence the temperature distribution and elements diffusion in the molten pool, which basically determines the microstructure and properties. The matrix and reinforced phases play an important role in laser cladding coating, which can increase the hardness, strength, wear resistance, oxidation resistance, corrosion resistance, biocompatibility, and so on. However, the excessive addition of reinforced phases or particles can deteriorate the ductility, and thus the balance between functional properties and basic properties should be considered during the design of the chemical composition of laser cladding coatings. In addition, the interface including the phase interface, layer interface, and substrate interface plays an important role in microstructure stability, thermal stability, chemical stability, and mechanical reliability. Therefore, the substrate state, the chemical composition of the laser cladding coating and substrate, the processing parameters, and the interface comprise the critical factors which influence the microstructure and properties of the laser cladding coating prepared. How to systematically optimize the influencing factors and obtain well-balanced performance are long-term research issues.

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Section: Electron Beam Claddingmentioning

confidence: 99%

Research Progress of Laser Cladding on the Surface of Titanium and Its Alloys

Zhao

Xie

et al. 2023

Materials

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“…This technology is characterized by high performance and allows forming the coatings with a thickness of 1 to 3 mm [14,[22][23][24][25][26][27][28]. The microstructure, phase composition and tribotechnical tests of the coatings were investigated.…”

Section: Introductionmentioning

confidence: 99%

Structure and wear resistance of Ti-TiC-TiB layers obtained by non-vacuum electron beam cladding

2017

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Abstract. In this study structure and tribotechnical properties of cp-titanium after non-vacuum electron beam cladding of powder mixture containing boron carbide were investigated. Structural investigations were carried out using optical and scanning electron microscopy and X-ray analysis. The thickness of cladded layers was 1.3…2.5 mm. The beam moving speed was not influence the phase composition of coatings. The main phases of the surface layers were α-titanium (αʹ-titanium), titanium carbide TiC and titanium boride TiB. It was determined that the average value of microhardness of the samples formed with the speed 25 mm/s was three times higher in comparison with substrate metal. A decrease in the beam moving speed led to an increase in the heat input per unit area and was accompanied by a reduction in the coating microhardness. To evaluate the wear resistance, friction test of the obtained materials against fixed abrasive particles was performed. The maximum relative wear resistance was exhibited by the coatings after cladding of 20 wt. % boron carbide and 30 wt. % titanium with the beam moving speed of 25 mm/s. Their wear resistance was 1.53 times higher as compared to cp-titanium.

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“…An electron beam injected in the air atmosphere is one of the most efficient energy sources used for the formation of high-quality high-strength coatings. The main advantages of non-vacuum electron beam cladding are a possibility to add refractory alloying components able to form high-strength compounds during solidification of a surface layer, a high heating velocity, a significant thickness of a cladded layer (up to 5 mm), the absence of cladded metal sputtering, and a high efficiency coefficient of equipment [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Cladding of Ni-Cr-Si-B Powder Coatings by an Electron Beam Injected into the Atmosphere

Zimoglyadova

Drobyaz

Батаев

et al. 2015

AMM

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The influence of the cladding rate on the structure and microhardness parameter of coatings obtained by non-vacuum electron beam treatment of Ni-Cr-Si-B powder mixtures was investigated. Modified layers characterized by the gradient structure and consist of dendritic grains and a eutectic located at the grain boundaries. It was found that the lowest microhardness level (300 HV) was characteristic of the coatings obtained when the workpiece was moving relative to an electron beam with a speed of 10 mm per second. This treatment regime allowed obtaining high-quality coatings 2.5 mm in thickness. However, a large thickness of fusion penetration led to the interfusion of the base metal with a coating material and a decrease in the concentration of alloying elements in the coating. Reducing the lifetime of the liquid phase during treatment prevented intensive diffusion processes. Increasing the treatment velocity to 20 mm per second doubled the cladded layer microhardness (up to 650 HV).

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Structure and properties of titanium surface layers after electron beam alloying with powder mixtures containing carbon

Cited by 22 publications

References 25 publications

Research Progress of Laser Cladding on the Surface of Titanium and Its Alloys

Research Progress of Laser Cladding on the Surface of Titanium and Its Alloys

Structure and wear resistance of Ti-TiC-TiB layers obtained by non-vacuum electron beam cladding

Cladding of Ni-Cr-Si-B Powder Coatings by an Electron Beam Injected into the Atmosphere

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