磨粒刮擦铝膜的亚表层磨损机制纳观探究

doi:10.11896/cldb.20110027

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Abstract Wear is a common phenomenon on moving contact surface, whose failure behaviour produced frequently on working environment for macroscopic mechanical equipment, especially for micro/nano electromechanical system. Furthermore, it’s also primary reason that the noise is generated among them. When abrasive particles scraped surface, it would occur occlusion performance around contact region. However, the internal mechanism of adhesive wear and the main cause of adhesion induction are still unclear up to now. Therefore, research on the wear mechanism between abrasive particles and Al substrate using classical molecular dynamics method is of particular importance, and compared the surface topography and deformation characteristics with the scraped substrate affected by external factors (temperature, particle size, scraping velocity). It was found that there were three stages described well during scraping process, namely the elastic deformation at initial scraping stage, the elastic-plastic deformation at middle scraping stage, and the plastic removal at stable scraping stage. Among them, the elastic-plastic defor-mation stages at middle scraping were the main internal cause leading to the adhesion induction, and the adhesion furrow force plays a leading contribution role in the whole scraping process. Moreover, temperature field and static stress distribution on closely contact area shows much more strengthened features than other places, which result in the phenomenons of heat movement migration intensified on local contact region.This research result will plays a practical significant role at atomic level on understanding the internal motion behaviour during scraping process, and deep into the intrinsic mechanism of bond point formation, which will provide a scientific perspective views on development of ultra-precision surface machining.

Key words： adhesion wear abrasive particle scratching process molecular dynamics surface morphology

Published: 13 January 2022 Online: 2022-01-13

CLC number:

TH117.1

Fund:This work was financially supported by the Public Welfare Research Program of Zhejiang Province (LGG19F020005),and the Natural Science Foundation of Fujian Province (2017J01709, 2018J01509, 2018J01556), and the Major Project of Ningde Normal University (2017ZDK19), and the Fujian University Students Support Project at Innovation and Entrepreneurship Education ([2017]52).

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	WENG Shengbin
	CHEN Jingjing
	ZHOU Jianqiang
	LIN Xiaoliang

Cite this article:

WENG Shengbin,CHEN Jingjing,ZHOU Jianqiang, et al. Wear Mechanism Analysis in Subsurface for Al Substrate Scraped by Abrasive Particle from Atomic Simulation[J]. Materials Reports, 2022, 36(1): 20110027-7.

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http://www.mater-rep.com/EN/10.11896/cldb.20110027 OR http://www.mater-rep.com/EN/Y2022/V36/I1/20110027

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