Effect of the micro-structure evolution of friction layer on the sliding tribology behavior of TiAl-10 Wt.% Ag at 16 N-0.5 m/s

Abstract

Purpose This paper aims to study the micro-structure evolution of friction layers to optimize the friction and wear behaviors of TiAl-based material. It further enlarges the scope of using TiAl alloys and increase in the service life of TiAl alloy-made mechanical components, especially under some extreme conditions. Design/methodology/approach To study the structure evolution of friction layers, the HT-1000 tribometer is used to study the friction and wear properties of as-prepared samples. With the assistance of field emission scanning electron microscopy and an electron probe micro-analyzer, the stratified structures in cross-sections and a surface morphology of the wear scars are well characterized. A ST400 surface profiler helps in better understanding of the three-dimensional texture profiles of wear scars. X-ray diffractometer (XRD) is also used to analyze phases in the as-prepared samples. Findings An analysis method on the micro-structure evolution can provide better views to understand the influence of friction layers on the tribological behavior, at different wear stages. It finds that the micro-structure evolution of friction layers has an immediate effect on the friction coefficients and wear rates of TiAl-based material. It also proves to be a useful tool for evaluating the behaviors in friction and wear of TiAl-based material. Originality/value The findings of this paper provide better assistance to explore the effect of friction layers on the friction and wear behaviors of TiAl-based materials. The results help in deep understanding of the micro-structure evolution of friction layers. It also increases the service life of TiAl-based mechanical components.

Synergistic lubrication effects of Sn–Ag–Cu and MXene–Ti3C2 to improve tribological properties of M50 bearing steel with microporous channels

“…The former is mainly to add texture to the material surface (Xue et al , 2021) or coat the contact surface (Holubets et al , 2020; Güler and Büyüklüolu, 2020). Changing the lubrication environment of materials mainly includes lubricating oil (Rudenko and Bandyopadhyay, 2013; Nuraliza and Syahrullail, 2016), grease (Pan et al , 2020; Laurentis et al , 2016) and solid lubricant (Yang et al , 2018; Huang et al , 2022a). Therefore, combining texture with solid lubricant to improve the tribological performances of M50 bearing steel is an important way to increase the fatigue life of the bearing.…”

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

“…At present, intermetallic materials and alloys based on γ-TiAl are attracting increased attention as high-temperature structural materials due to their light weight, high specific modulus of elasticity, high specific strength, and heat resistance [1][2][3]. The manufacture of finished products from intermetallic materials is a promising direction in the aerospace and automotive industries for turbine blades, bearings, and exhaust valves [4][5][6]. The replacement of currently existing nickel-based superalloys [7][8][9] with alloys based on titanium aluminides will make it possible to reduce the weight of gas turbine engine parts by up to 1.5-2 times (density of nickel superalloys is about 9 g/cm 3 , whereas that for alloys based on γ-TiAl is about 4 g/cm 3 ).…”