Simultaneous laser in-situ generation of graphene and micro-textures on ductile iron and their effects on tribological properties
In this study, a picosecond (ps) laser was employed to produce micro-textures on ductile iron in linearly processing leading to significantly higher processing efficiency. The fabrication efficiency was increased about 1331 times as compared to the more common spot-by-spot texturing method. The ps l...
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2021
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oai:doaj.org-article:37fcbbec67be4f2baffd16d85004c5e02021-12-04T04:34:32ZSimultaneous laser in-situ generation of graphene and micro-textures on ductile iron and their effects on tribological properties2238-785410.1016/j.jmrt.2021.11.091https://doaj.org/article/37fcbbec67be4f2baffd16d85004c5e02021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421013703https://doaj.org/toc/2238-7854In this study, a picosecond (ps) laser was employed to produce micro-textures on ductile iron in linearly processing leading to significantly higher processing efficiency. The fabrication efficiency was increased about 1331 times as compared to the more common spot-by-spot texturing method. The ps laser induced graphene (LIG) structures were simultaneously fabricated in dimples, which further enhanced the surface tribological properties. The surface micro-textures were produced by forming micro-dimples on the substrate via the laser ablation process. The dimple diameter and area density were regulated by varying the key laser processing parameters, and were experimentally correlated to the tribological properties of the ductile iron substrate. To understand deeper into the wear reduction mechanism of the micro-dimples, simulation models based on the Reynold equation were established, which analyze the flow field pressure distribution and demonstrate the hydrodynamic lubrication effect of the micro-textures. The ball-on disk friction test showed that the area density of the micro-textures had a significant influence on the friction and wear properties. The micro-texture with the area density of 20% and the average dimple diameter of 36 μm showed the highest volume wear rate reduction of 70% and the friction coefficient reduction of 20% respectively. The results indicated that the simultaneous laser in-situ generation of graphene micro-textures is an effective way of enhancing tribological properties on the ductile iron surface. It enhances the hardness of textured surfaces, thermal diffusion, debris capture ability, and fluid dynamic lubrication effect.Weicheng LiuZhiwen WangWei YuanWentao TianXuhui SunChengjin WangAli Naderi BakhtiyariJianchen CongHongyu ZhengElsevierarticleLaser surface texturingDuctile ironTribological propertiesLaser-induced grapheneMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 6541-6550 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Laser surface texturing Ductile iron Tribological properties Laser-induced graphene Mining engineering. Metallurgy TN1-997 |
| spellingShingle |
Laser surface texturing Ductile iron Tribological properties Laser-induced graphene Mining engineering. Metallurgy TN1-997 Weicheng Liu Zhiwen Wang Wei Yuan Wentao Tian Xuhui Sun Chengjin Wang Ali Naderi Bakhtiyari Jianchen Cong Hongyu Zheng Simultaneous laser in-situ generation of graphene and micro-textures on ductile iron and their effects on tribological properties |
| description |
In this study, a picosecond (ps) laser was employed to produce micro-textures on ductile iron in linearly processing leading to significantly higher processing efficiency. The fabrication efficiency was increased about 1331 times as compared to the more common spot-by-spot texturing method. The ps laser induced graphene (LIG) structures were simultaneously fabricated in dimples, which further enhanced the surface tribological properties. The surface micro-textures were produced by forming micro-dimples on the substrate via the laser ablation process. The dimple diameter and area density were regulated by varying the key laser processing parameters, and were experimentally correlated to the tribological properties of the ductile iron substrate. To understand deeper into the wear reduction mechanism of the micro-dimples, simulation models based on the Reynold equation were established, which analyze the flow field pressure distribution and demonstrate the hydrodynamic lubrication effect of the micro-textures. The ball-on disk friction test showed that the area density of the micro-textures had a significant influence on the friction and wear properties. The micro-texture with the area density of 20% and the average dimple diameter of 36 μm showed the highest volume wear rate reduction of 70% and the friction coefficient reduction of 20% respectively. The results indicated that the simultaneous laser in-situ generation of graphene micro-textures is an effective way of enhancing tribological properties on the ductile iron surface. It enhances the hardness of textured surfaces, thermal diffusion, debris capture ability, and fluid dynamic lubrication effect. |
| format |
article |
| author |
Weicheng Liu Zhiwen Wang Wei Yuan Wentao Tian Xuhui Sun Chengjin Wang Ali Naderi Bakhtiyari Jianchen Cong Hongyu Zheng |
| author_facet |
Weicheng Liu Zhiwen Wang Wei Yuan Wentao Tian Xuhui Sun Chengjin Wang Ali Naderi Bakhtiyari Jianchen Cong Hongyu Zheng |
| author_sort |
Weicheng Liu |
| title |
Simultaneous laser in-situ generation of graphene and micro-textures on ductile iron and their effects on tribological properties |
| title_short |
Simultaneous laser in-situ generation of graphene and micro-textures on ductile iron and their effects on tribological properties |
| title_full |
Simultaneous laser in-situ generation of graphene and micro-textures on ductile iron and their effects on tribological properties |
| title_fullStr |
Simultaneous laser in-situ generation of graphene and micro-textures on ductile iron and their effects on tribological properties |
| title_full_unstemmed |
Simultaneous laser in-situ generation of graphene and micro-textures on ductile iron and their effects on tribological properties |
| title_sort |
simultaneous laser in-situ generation of graphene and micro-textures on ductile iron and their effects on tribological properties |
| publisher |
Elsevier |
| publishDate |
2021 |
| url |
https://doaj.org/article/37fcbbec67be4f2baffd16d85004c5e0 |
| work_keys_str_mv |
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