DYNAMIC RECRYSTALLIZATION DOMINATED WEAR MECHANISM OF NANOSTRUCTURED Cu

doi:10.3724/SP.J.1037.2013.00810

Acta Metall Sin

2014, Vol. 50

Issue (2): 238-244 DOI: 10.3724/SP.J.1037.2013.00810

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DYNAMIC RECRYSTALLIZATION DOMINATED WEAR MECHANISM OF NANOSTRUCTURED Cu

HAN Zhong(

), YAO Bin, LU Ke

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

Cite this article:

HAN Zhong, YAO Bin, LU Ke. DYNAMIC RECRYSTALLIZATION DOMINATED WEAR MECHANISM OF NANOSTRUCTURED Cu. Acta Metall Sin, 2014, 50(2): 238-244.

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Abstract

Grain refinement induced increase in hardness is of interest from a tribological point of view. Most of nanostructured metals show an enhanced wear resistance in comparison with their coarse-grained counterparts. To understand the related wear mechanism, the tribological properties and worn subsurface structure of nanostructured Cu were investigated under both dry and oil-lubricated sliding conditions, respectively. The wear resistance and worn subsurface structure of nanostructured Cu were compared under different conditions. The results indicate that nanostructured Cu exhibits a dynamic recrystallization (DRX) dominated wear mechanism under both conditions. A pronounced correlation is identified that wear rate increases significantly with an increasing grain size or decreasing hardness of DRX structure.

Key words: nanostructured metal Cu wear subsurface structure dynamic recrystallization

Received: 12 December 2013

ZTFLH:

TG146.1

Fund: Supported by National Basic Research Program of China (No.2012CB932201), National Natural Science Foundation of China (No.51231006), International S&T Cooperation Project of China (No.2010DFB54010) and Danish-Chinese Center for Nano-metals (No.51261130091)

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	Zhong HAN
	Bin YAO
	Ke LU

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2013.00810 OR https://www.ams.org.cn/EN/Y2014/V50/I2/238

表1 DPD Cu样品退火条件及其硬度

Fig.1

干摩擦条件载荷为30 N时DPD Cu及其退火态样品耐磨性随硬度的变化

Fig.2

油润滑条件载荷为30 N时DPD Cu及其退火态样品耐磨性随硬度的变化

Fig.3

不同润滑条件下载荷为10 N时DPD Cu和DPD Cu 80 ^oC退火样品磨痕亚表层结构

Fig.4

不同润滑条件下载荷为20和30 N 时DPD Cu样品磨痕亚表层结构

Fig.5

不同润滑条件下载荷为10 N 和 20 N 时CG Cu样品磨痕亚表层结构

Fig.6

油润滑和摩擦滑动条件下DPD Cu样品磨损量随DRX晶粒尺寸变化

Fig.7

油润滑和干摩擦滑动条件下CG Cu磨损量随DRX晶粒尺寸变化

Fig.8

干摩擦滑动条件下DPD Cu及其退火态样品磨损量随DRX层显微硬度变化

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