Research Papers: Friction and Wear

Experimental Analysis of Friction and Wear of Laser Microtextured Surface Filled With Composite Solid Lubricant and Lubricated With Grease on Sliding Surfaces

[+] Author and Article Information
Xijun Hua, Jianguo Sun, Peiyun Zhang, Jinghu Ji, Hao Fu, Zhengyang Kang

School of Mechanical Engineering,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China

Julius Caesar Puoza

School of Mechanical Engineering,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China;
Department of Mechanical Engineering,
Sunyani Polytechnic,
Sunyani 206, Ghana
e-mail: deokaesar@yahoo.co.uk

Hao Wang

Intellectual Property Research Center
of Jiangsu Province,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received April 15, 2016; final manuscript received August 28, 2016; published online January 25, 2017. Assoc. Editor: Min Zou.

J. Tribol 139(2), 021609 (Jan 25, 2017) (8 pages) Paper No: TRIB-16-1129; doi: 10.1115/1.4034617 History: Received April 15, 2016; Revised August 28, 2016

Experimental studies of friction and wear on textured surfaces filled with composite solid lubricant and lubricated with grease were conducted on a sliding plain bearing to enhance the working performance and lifetime under different conditions. Circular microdimples of different diameters were fabricated on GCr15 bearing steel specimens using the semiconductor sound and light pumped Nd:YAG laser machining equipment. Ring-on-ring tribological test configuration with GCr15 tribopairs under a combined non-Newtonian lubrication of grease and composite lubricant was performed. The results showed that the surface textures on specimen GCr15 bearing steel material filled composite solid lubricant and lubricated with grease (TLG), reduced the friction by 27%, 46%, and 75% of the grease only (TG), solid lubricant only (TL), and nonlubricated (T) specimens, respectively. The textured specimen with dimple diameter of 109 μm lowered the maximum coefficient of friction by 38% and enhanced the antiwear properties of GCr15 bearing steel material remarkably. This indicated that grease has great potential in promoting service life and working performance of sliding plain bearing when combined with composite solid lubricant in a laser-textured surface. It is therefore beneficial for applications in the machinery and automotive components industries in saving energy and reducing CO2 emission.

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Fig. 1

The scanning electron microscope (SEM) topograph of Gr–MoS2–PI–CNT composite solid lubricant

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Fig. 2

Diagram of upper (a) and lower (b) friction mates

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Fig. 3

The texture density calculation model

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Fig. 4

Friction and wear testing rig

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Fig. 5

Variations of friction coefficient of textured surfaces with different dimples diameters (load = 100 N and sliding speed = 100 rpm)

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Fig. 6

Friction coefficient of greases versus sliding time (load = 100 N and sliding speed = 100 rpm)

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Fig. 7

Friction coefficient of specimens TLG, TG, TL, and T versus sliding time (load = 100 N and sliding speed = 100 rpm)

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Fig. 8

Three-dimensional micrographs of wear scars and Rq values on the lower specimen surfaces T (a), TL (b), TG (c), and TLG (d)

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Fig. 9

Friction coefficient of specimens TLG and TG versus sliding speed (load = 100 N)

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Fig. 10

Friction coefficient of specimens TLG and TG versus applied load (sliding speed = 100 rpm)



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