Atomistic simulations on adhesive contact of single crystal Cu and wear behavior of Cu-Zn alloy

doi:10.1088/1674-1056/abbbf6

Abstract Atomistic simulations are carried out to investigate the nano-indentation of single crystal Cu and the sliding of the Cu-Zn alloy. As the contact zone is extended due to adhesive interaction between the contact atoms, the contact area on a nanoscale is redefined. A comparison of contact area and contact force between molecular dynamics (MD) and contact theory based on Greenwood-Williamson (GW) model is made. Lower roughness causes the adhesive interaction to weaken, showing the better consistency between the calculated results by MD and those from the theoretical model. The simulations of the sliding show that the substrate wear decreases with the mol% of Zn increasing, due to the fact that the diffusion movements of Zn atoms in substrate are blocked during the sliding because of the hexagonal close packed (hcp) structure of Zn.

Keywords: atomistic simulation nano-indentation wear behavior

Received: 12 July 2020
Revised: 03 September 2020
Accepted manuscript online: 28 September 2020

PACS:	68.35.Af	(Atomic scale friction)
	02.70.Ns	(Molecular dynamics and particle methods)
	68.35.-p	(Solid surfaces and solid-solid interfaces: structure and energetics)
	73.43.Cd	(Theory and modeling)

Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2018YFC0808800), the Natural Science Foundation of Jiangsu Higher Education Institutions, China (Grant No. 17KJA460002), and the "Six Talent Peaks" of Jiangsu Province, China (Grant No. GDZB-002).

Corresponding Authors: ^†Corresponding author. E-mail: liulin@cczu.edu.cn ^‡Corresponding author. E-mail: wumengling50@126.com

Cite this article:

You-Jun Ye(叶有俊), Le Qin (秦乐), Jing Li (李京), Lin Liu(刘麟), and Ling-Kang Wu(吴凌康) Atomistic simulations on adhesive contact of single crystal Cu and wear behavior of Cu-Zn alloy 2021 Chin. Phys. B 30 026801

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Atomistic simulations on adhesive contact of single crystal Cu and wear behavior of Cu-Zn alloy

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