Atomistic insight into flash temperature during friction

Liu, Yi; Xu, Rui; Wang, Jianli; Wan, Shanhong; Bai, Lin

doi:10.1016/j.icheatmasstransfer.2022.106317

Cited by 2 publications

(2 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the contact surface temperature is high, the grain boundary is viscous and the ability to resist deformation is reduced, so the grain boundary shear becomes the main deformation mode. In addition, high temperature and low strain can allow grain boundary annihilation to invade dislocations and induce softening [26][27][28][29][30][31]. The softening effect changes the morphology of the contact material and the migration of Cu, which induces the dry sliding behavior.…”

Section: Discussionmentioning

confidence: 99%

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Shang,

Li,

Zhang

2023

Mater. Res. Express

View full text Add to dashboard Cite

In this paper, the copper coupled with steel under dry sliding are comparatively sdudied at 0.56 m s−1 and 3.36 m s−1 condition from the morphology, structure and composition of tribolayer of the copper. It is found that the wear rate of Cu at 3.36 m s−1 is twice that at 0.56 m s−1, and the temperature of Cu block at 3.36 m s−1 (240 °C) is much higher than that at 0.56 m s−1 (75 °C). The results show that when the grinding speed is 0.56 m s−1, the grain distortion occurs in the top area of the subsurface layer of Cu block. When the grinding speed is 3.36 m s−1, the grain refinement zone appears below the subsurface layer of Cu block wear. The study further proves that the softening caused by friction heat occurs in the grain refinement zone, and a large number of softened metal copper tends to transfer to the opposite side. At the same time, the friction heat changes the mechanical and thermal deformation, material transfer and friction oxidation of the contact surface, which has a great influence on the dry sliding behavior of Cu.

show abstract

Section: Discussionmentioning

confidence: 99%

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Shang,

Li,

Zhang

2023

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Figure 11 illustrates the kinetic friction coefficient of the as-sprayed coating as a function of time. It is clearly visible that the evolution of the friction coefficient can be divided into two periods, namely the running-in period and the steady-state period, as denoted by other researchers as the normal friction period [26][27].…”

Section: Surface Cartography As a Function Timementioning

confidence: 99%

Modeling Temperature of Contact Generated in Coatings of Pure Alumina Ceramic onto Low Carbon Steel Type 1.0060 Obtained by the Thermal Spraying Process

Younes¹,

Mouadji

Touati³

et al. 2023

AMR

View full text Add to dashboard Cite

In previous research problem statement occur in hardness to reach the thermal flux between surfaces during movement. The aim of the present investigation has been conducted to study the thermal behavior of ceramic Al2O3 (AL-99) coated on a low carbon steel type 1.0060 by using a thermal flame spray technique. The key methods used is microstructural characterization and comparing between experimental data record and numerical program.SEM showed that the Al2O3 coatings have a dense microstructure, lamellar morphology and complex of several phases. The XRD analysis of the coating after the spray showed a majority phase of α -Al2O3 rhombohedral structure and secondary phase of γ-Al2O3 orthorhombic structure. The experimental data recorded From wear indicate two step, first one corresponds to the phase of accommodation between surfaces (samples/ disc), the contact temperature gradually increases to a value Of 75 °C for both pairs, the second step , we could remark from experimental and numerical simulation, it reach 95°C for experimental test and 85 for numerical model.The important findings in tribological results showed that the temperature at the contact is related to the shear stress that will result from the increase of the heat flux. From these results it can be said that the measured temperature increases with the increase of the charge and converges with the contact time. The gap of temperature between experimental and numerical results is probably due to the parameter of microstructure, where in experimental porosities improve convection in the area, in contrast the numerical materials don't add this phenomena.

show abstract

Atomistic insight into flash temperature during friction

Cited by 2 publications

References 58 publications

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Modeling Temperature of Contact Generated in Coatings of Pure Alumina Ceramic onto Low Carbon Steel Type 1.0060 Obtained by the Thermal Spraying Process

Contact Info

Product

Resources

About

Atomistic insight into flash temperature during friction

Cited by 2 publications

References 58 publications

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s−1 speeds

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s−1 speeds

Modeling Temperature of Contact Generated in Coatings of Pure Alumina Ceramic onto Low Carbon Steel Type 1.0060 Obtained by the Thermal Spraying Process

Contact Info

Product

Resources

About

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds