Quasi-nano wear mechanism under repeated impact contact loading

A new quasi-nano wear mechanism (QNWM) has been proposed in this paper based on the facts of wear curve turning under high energy impact contact loading. Its characteristic is that the wear rate of QNWM is only 1/10-1/3 that of delamination mechanism at the same energy density. The diameters of wear...

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Published in:Science China Technological Sciences 2010-06, Vol.53 (6), p.1583-1589
Main Authors: Zhu, JinHua, Ren, XiangHong, Zhang, JianJun, Xu, YunHua, Lu, ZhengXin
Format: Article
Language:English
Subjects:
Contact
Debris
Delaminating
Delamination
Energy density
Engineering
Fracture mechanics
Microcracks
Nanocomposites
Nanocrystals
Nanomaterials
Nanostructure
Pits
Strain
Surface layer
Turning
Wear
Wear mechanisms
Wear particles
Wear rate
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description A new quasi-nano wear mechanism (QNWM) has been proposed in this paper based on the facts of wear curve turning under high energy impact contact loading. Its characteristic is that the wear rate of QNWM is only 1/10-1/3 that of delamination mechanism at the same energy density. The diameters of wear debris and pits on the worn surfaces fall into the quasinanometer scale (about 50–120 nm). The necessary and sufficient conditions, which bring about the QNWM, are: (i) the nanostructure (nano-crystalline + amorphous phase) in impact contact surface layer has formed by the intensive impact strain; (ii) the delamination wear cracking in sub-surface layer must be restrained; (iii) the microcracks of QNWM are produced in amorphous phase of surface nano-structure layer rather than in nano-crystalline.
doi_str_mv 10.1007/s11431-010-3147-9
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subjects Contact
Debris
Delaminating
Delamination
Energy density
Engineering
Fracture mechanics
Microcracks
Nanocomposites
Nanocrystals
Nanomaterials
Nanostructure
Pits
Strain
Surface layer
Turning
Wear
Wear mechanisms
Wear particles
Wear rate
title Quasi-nano wear mechanism under repeated impact contact loading
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