Tribological properties of the uncoated and aluminized Ti–48Al–2Cr–2Nb TiAl alloy at high temperatures

Mengis, Lukas; Grimme, Christoph; Galetz, Mathias C.

doi:10.1016/j.wear.2021.203818

Cited by 15 publications

(4 citation statements)

References 34 publications

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“…The Sn30 BHEA presented the minimum average COFs. The mechanical properties (hardness, strength, and plasticity) have a considerable effect on tribological properties [46][47][48]. Normally, the relationship between tribological and mechanical properties can be described as W = k(P/H) (W is wear rate, P is applied load, k is relative to plasticity, and H is hardness) [46].…”

Section: Friction and Wear Properties Of Sn30 Bhea And Sn35 Bheamentioning

confidence: 99%

Mechanical, Corrosion, and Wear Properties of TiZrTaNbSn Biomedical High-Entropy Alloys

Wang

et al. 2022

Coatings

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The phase composition, microstructure, mechanical, corrosion, and wear behaviors of the Ti15Zr35Ta10Nb10Sn30 (Sn30) and Ti15Zr30Ta10Nb10Sn35 (Sn35) biomedical high-entropy alloys (BHEAs) were studied. We found that the Ti–Zr–Ta–Nb–Sn BHEAs showed hyper-eutectic and eutectic structures with body-centered cubic (BCC) and face-centered cubic (FCC) solid-solution phases. The Sn30 BHEA exhibited a high Vickers hardness of approximately 501.2 HV, a compressive strength approaching 684.5 MPa, and plastic strain of over 46.6%. Furthermore, the Vickers hardness and compressive strength of Sn35 BHEA are 488.7 HV and 999.2 MPa, respectively, with a large plastic strain of over 49.9%. Moreover, the Sn30 and Sn 35 BHEA friction coefficients are 0.152 and 0.264, respectively. Sn30 BHEA has the smallest and shallowest furrow-groove width, and its wear rate is 0.86 (km/mm3); at the same time, we observed the delamination phenomenon. Sn35 BHEA has a wear rate value of 0.78 (km/mm3), and it displays wear debris and the largest–deepest furrow groove. Sn30 BHEA has the highest impedance value, and its corrosion current density Icorr is 1.261 × 10−7 (A/cm2), which is lower than that of Sn35 BHEA (1.265 × 10−6 (A/cm2)) by 88%, and the passivation current density Ipass of Sn30 BHEA and Sn35 BHEA is 4.44 × 10−4 (A/cm2) and 3.71 × 10−3 (A/cm2), respectively. Therefore, Sn30 BHEA preferentially produces passive film and has a small corrosion tendency, and its corrosion resistance is considerably better than that of the Sn35 BHEA alloy.

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Section: Friction and Wear Properties Of Sn30 Bhea And Sn35 Bheamentioning

confidence: 99%

Mechanical, Corrosion, and Wear Properties of TiZrTaNbSn Biomedical High-Entropy Alloys

Wang

et al. 2022

Coatings

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“…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]. In addition, the use of alloys based on γ-TiAl is limited due to their insufficient resistance to oxidation at temperatures above 700-750 • C [17,18]. Poor sliding friction and low wear resistance become an obstacle to improving the axial load and service life of γ-TiAl alloy components under extreme conditions [19].…”

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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“…[ 4,19 ] However, the γ‐TiAl alloys always have poor wear resistance at room temperature. [ 20,21 ] So far, few reports refer to depositing the WC coatings on the surface γ‐TiAl alloy and exploring mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Adhesion, and Properties of Multilayer Structure WC/W/MCrAlY Coating on γ‐TiAl Alloy Prepared by Plasma Surface Metallizing Technique and Microwave Plasma Chemical Vapor Deposition

Wang

Chen

et al. 2022

Adv Eng Mater

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The WC coatings with a multilayer structure are synthesized on a γ-TiAl alloy by the combined treatments of plasma surface metallizing technique and microwave plasma chemical vapor deposition. The morphology, microstructure, and phases of the coatings are examined by a white light profilometer, scanning electron microscope, and X-ray diffraction analysis techniques. The formation of tungsten carbide coating leads to high hardness and good wear resistance. Because of a W transition layer and MCrAlY bonding layer, the good adhesion is achieved between coatings and substrate. This result provides a new approach for designing refractory metals and/or their carbide coatings on metals/alloys substrates, for example, WC and/or W coating on TiAl alloy and titanium alloys.

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Tribological properties of the uncoated and aluminized Ti–48Al–2Cr–2Nb TiAl alloy at high temperatures

Cited by 15 publications

References 34 publications

Mechanical, Corrosion, and Wear Properties of TiZrTaNbSn Biomedical High-Entropy Alloys

Mechanical, Corrosion, and Wear Properties of TiZrTaNbSn Biomedical High-Entropy Alloys

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

Microstructure, Adhesion, and Properties of Multilayer Structure WC/W/MCrAlY Coating on γ‐TiAl Alloy Prepared by Plasma Surface Metallizing Technique and Microwave Plasma Chemical Vapor Deposition

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