Dry-Sliding Tribological Properties of TiAl Alloys and Ti2AlN/TiAl Composites at High Temperature

Zhang, Ningbo; Sun, Dalin; Xiao, Han; Wang, Daqun; Wang, Qing; Liu, Hao; Yu, Zhenhe

doi:10.1007/s11665-018-3682-2

Cited by 7 publications

(1 citation statement)

References 36 publications

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“…However, to use these intermetallic compounds as new structural materials for the manufacture of turbine blades, turbocharger wheels, exhaust valves, and expanding dampers, both high mechanical properties and high wear resistance are required [13][14][15]. The scope of intermetallic compounds based on γ-TiAl in a wider range of industrial applications is limited due to their low tribological characteristics [16].…”

Section: Introductionmentioning

confidence: 99%

Relationship between Structure and Properties of Intermetallic Materials Based on γ-TiAl Hardened In Situ with Ti3Al

Авдеева

Bazhina

Antipov

et al. 2023

Metals

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In this work, intermetallic materials based on γ-TiAl in situ strengthened with the Ti3Al phase have been obtained from the initial components of titanium and aluminum under the conditions of free SHS-compression in one technological step and in ten seconds. This method combines the process of the combustion of initial components in the mode of self-propagating high-temperature synthesis (SHS) with high-temperature shear deformation of the synthesized materials. The following initial compositions have been studied (mol): Ti–Al, 1.5 Ti–Al, and 3 Ti–Al. Thermodynamic calculations have been carried out and the actual combustion temperature of the compositions under study has been measured. To increase the exothermicity of the studied compositions, a “chemical furnace” based on a mixture of Ti–C powders has been used, which allows us to increase the combustion temperature and stabilize the combustion front. It has been found that the actual combustion temperature of the selected compositions increased from 890–1120 to 1000–1350 °C. The results of X-ray powder diffraction and SEM are presented, mechanical and tribological characteristics of the obtained materials are measured, and 3D images of wear grooves are given. It has been found that a decrease in Ti molar fraction and an increase in Al molar fraction in the initial mixture lead to an increase in the mechanical (hardness up to 10.2 GPa, modulus of elasticity up to 215 GPa) and tribological characteristics (wear up to 4.5 times, coefficient of friction up to 2.4 times) of intermetallic materials.

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Section: Introductionmentioning

confidence: 99%

Relationship between Structure and Properties of Intermetallic Materials Based on γ-TiAl Hardened In Situ with Ti3Al

Авдеева

Bazhina

Antipov

et al. 2023

Metals

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A Novel Al‐Rich/Ti–6Al–4V Layered Composite with Superior Wear and Electrochemical Behavior

et al. 2020

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By adding a certain amount of Al to the surface of Ti–6Al–4V (TC4) alloy, a novel layered composite composed of TC4 alloy matrix and Al‐rich alloy is designed and successfully fabricated by a blended elemental powder metallurgy (BE PM) method. The results demonstrated that after the addition of 1 wt% Al, the layered composite exhibits superior wear and electrochemical behavior over powder metallurgy Ti–6Al–4V (PM TC4) alloy, which indicates that a wear‐resistant and corrosion‐resistant layer can be in situ synthesized on the sample surface. Moreover, the volume fraction of α phase, the thickness of α colonies, porosity, Rockwell hardness, and wear resistance of the layered composites increase significantly with Al addition, resulting in the decrease in area, width, and depth of wear tracks, and the reduction of average friction coefficients (COFs). Furthermore, with the addition of Al, the galvanic effect at the interface of α/β phase reduces, whereas the porosity of the layered composites, the chemical activity, and the corrosion rate of α phase increase significantly. Therefore, the corrosion resistance of the layered composites increases first and then decreases with Al addition, and the optimum value can be achieved when the added amount of Al is 1 wt%.

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Enhancing the mechanical and tribological properties of TiAl alloy by network structured Ti2AlC

Zhu,

Yan,

Wang

et al. 2024

J Mater Sci

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Dry-Sliding Tribological Properties of TiAl Alloys and Ti2AlN/TiAl Composites at High Temperature

Cited by 7 publications

References 36 publications

Relationship between Structure and Properties of Intermetallic Materials Based on γ-TiAl Hardened In Situ with Ti3Al

Relationship between Structure and Properties of Intermetallic Materials Based on γ-TiAl Hardened In Situ with Ti3Al

A Novel Al‐Rich/Ti–6Al–4V Layered Composite with Superior Wear and Electrochemical Behavior

Enhancing the mechanical and tribological properties of TiAl alloy by network structured Ti2AlC

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