Necessary conditions for low friction between laser-irradiated aluminum alloy and bearing steel in engine oil

Ihara, Ken; Adachi, K.

doi:10.1016/j.triboint.2023.108607

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…4, 5, and 6, respectively. ZnDTP contains phosphorus in its molecular structure [7] and forms a phosphate film on worn surfaces [21,[28][29][30]. Thus, the increased phosphorus concentration implies increased ZnDTP reactions and the formation of the ZnDTPderived phosphate film.…”

Section: Effect Of Additive Combination On Friction Reduction Of Sili...mentioning

confidence: 99%

Running-in for Low Friction between Silicon-Containing Aluminum Alloy and Bearing Steel in Engine Oil

Ihara

Adachi

2023

Tribology Online

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The friction properties of an aluminum-silicon alloy (Al-Si) can be improved by increasing its silicon content. However, this can deteriorate the material properties necessary for engine components. Therefore, an alternative approach to reduce friction is required. This study investigated the running-in behavior, the reduction of friction from the initial to the stable phase of sliding, between Al-Si with varying silicon contents and bearing steel in fully formulated engine oil. The friction of Al-Si and the silicon-free aluminum alloy (Al) was classified into three modes: no friction reduction (mode I), friction reduction after a high-friction period (mode II), and immediate friction reduction (mode III). Al exhibited only mode I, low-silicon-content Al-Si mainly displayed mode II, and high-siliconcontent Al-Si mainly exhibited mode III. Energy-dispersive X-ray spectroscopy revealed that, for mode II, zinc dithiophosphate (ZnDTP) reacted with the aluminum matrix, suppressing aluminum adhesion and forming molybdenum-dithiocarbamate-derived tribofilm. Nanoindentation and micro-Vickers tests demonstrated that the initial high hardness of the Al-Si matrix did not increase the ZnDTP reactions. However, the friction-induced hardened layer on the matrix promoted the ZnDTP reactions, suggesting that forming the hardened layer is a key factor in the low-friction interface of Al-Si without increasing silicon content.

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Section: Effect Of Additive Combination On Friction Reduction Of Sili...mentioning

confidence: 99%

Running-in for Low Friction between Silicon-Containing Aluminum Alloy and Bearing Steel in Engine Oil

Ihara

Adachi

2023

Tribology Online

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Analysis on the transformation of melt wear to self-healing crack of wire arc additive manufactured Al 5356 alloy

Prabu

Jeyaprakash

Yang

et al. 2023

Tribology International

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Temperature evolution prediction of engine big-end bearing by tribo-dynamics modeling and wireless measurement verification

Yin,

Zhang,

Lyu

et al. 2024

Tribology International

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Necessary conditions for low friction between laser-irradiated aluminum alloy and bearing steel in engine oil

Cited by 3 publications

References 25 publications

Running-in for Low Friction between Silicon-Containing Aluminum Alloy and Bearing Steel in Engine Oil

Running-in for Low Friction between Silicon-Containing Aluminum Alloy and Bearing Steel in Engine Oil

Analysis on the transformation of melt wear to self-healing crack of wire arc additive manufactured Al 5356 alloy

Temperature evolution prediction of engine big-end bearing by tribo-dynamics modeling and wireless measurement verification

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