Oxidation of TiAl alloy by oxygen grain boundary diffusion

Chepak-Gizbrekht, M.V.; Knyazeva, A. G.

doi:10.1016/j.intermet.2023.107993

Cited by 7 publications

(1 citation statement)

References 79 publications

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“…Their main objective is to increase resistance to frictional wear of the surface layer of titanium alloy parts. Among the investigated technological approaches, the most widespread is the processes of chemical-thermal treatment, consisting of diffusion saturation of the surface layer of titanium alloy parts with various elements [22][23][24][25][26][27] and coating deposition processes by various techniques such as detonation, ion-plasma, laser powder cladding, and so on [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Influence of Cr-Al-Si-N and DLC-Si Thin Coatings on Wear Resistance of Titanium Alloy Samples with Different Surface Conditions

Volosova,

Lyakhovetsky,

Mitrofanov

et al. 2023

Coatings

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The influence of Cr-Al-Si-N, DLC-Si, and Cr-Al-Si-N/DLC-Si thin coatings deposited on titanium alloy (Ti-Al-Zr-Sn-Nb system) samples with different surface reliefs on wear resistance under abrasion and fretting conditions was investigated. The influence of coatings on the initial microrelief after finishing milling and lapping with micro-grained abrasive was studied by profilometry. The Martens hardness (H) and the elastic modulus (E) were determined through nanoindentation. The H/E ratio was 0.08, 0.09, and 0.13, respectively. The adhesion bond strength and H/E ratio relationship was revealed using a scratch testing analysis. Volumetric wear after 20 min of abrasive exposure was reduced by 11, 25, and 31 times for Cr-Al-Si-N, DLC-Si, and Cr-Al-Si-N/DLC-Si coatings compared to uncoated ones after milling and by 15, 32, and 35 times after lapping. Volumetric wear under fretting conditions was reduced by 1.8 and 4 times for Cr-Al-Si-N coating after milling and lapping. It was reduced by tens of times for DLC-Si coating and by hundreds of times for Cr-Al-Si-N/DLC-Si coating. The Cr-Al-Si-N/DLC-Si coating (a thickness of 3.1 ± 0.15/2.0 ± 0.1 µm) is characterized by the best combination of hardness (24 ± 1 GPa), elastic modulus (185 ± 8 GPa), and friction coefficient (0.04–0.05 after milling and 0.1 after lapping) and ensures maximum wear resistance under a wide range of loads. The novelty of the work is that those coatings were not practically under study concerning the deposition on the titanium alloy regarding typical mechanical loads such as abrasive and fretting wear but are of interest to the aviation and aerospace industry.

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Section: Introductionmentioning

confidence: 99%

Influence of Cr-Al-Si-N and DLC-Si Thin Coatings on Wear Resistance of Titanium Alloy Samples with Different Surface Conditions

Volosova,

Lyakhovetsky,

Mitrofanov

et al. 2023

Coatings

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Influence of Furnace Pressure on the Growth Characteristic of Oxide Film on Piercing Plug Steel

Lu,

Tian

2024

steel research int.

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Different oxidation processes are carried out by using 20Cr2Ni4 piercing plug steel to study the influence of furnace pressure on the growth characteristic of oxide film in high‐temperature C2H5OH–H2O atmosphere. The results show that oxide film under different processes shows clearly two layers. The inner film is porous with the main constituents of FeO and Fe3O4 while the outer film is dense with large bubbles. The elemental Ni aggregates as a dot‐like substance in the inner oxide, where the enrichment of Cr lags behind the frontier boundary of Ni distribution. It is found that the thickness of the oxide film shows a parabolic relationship with product of the square root of oxidation time and furnace pressure. High furnace pressure can keep the pressure balance of the bubbles to swell to sufficient size, but may cause cracking during the relief process of pressure.

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The Oxidation Behavior of Spark Plasma Sintered Ti-48Al Alloys

Krishnan,

Davidson,

et al. 2024

J. of Materi Eng and Perform

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Oxidation of TiAl alloy by oxygen grain boundary diffusion

Cited by 7 publications

References 79 publications

Influence of Cr-Al-Si-N and DLC-Si Thin Coatings on Wear Resistance of Titanium Alloy Samples with Different Surface Conditions

Influence of Cr-Al-Si-N and DLC-Si Thin Coatings on Wear Resistance of Titanium Alloy Samples with Different Surface Conditions

Influence of Furnace Pressure on the Growth Characteristic of Oxide Film on Piercing Plug Steel

The Oxidation Behavior of Spark Plasma Sintered Ti-48Al Alloys

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