International Journal of Surface Science and Engineering (8 papers in press)

Regular Issues

• Studying the load capacity and frictional force in an engine based on microtexture's different dimensions  
  by Jili Zha, Vanliem Nguyen 
  Abstract: The solid contact force (Fsc) and frictional force (Ffsc) generated in the mixed lubricating zone of the crank pin bearing are very high and greatly affect the engine power. Based on the lubricating model of the crank pin bearing, the hemispherical structure (HS) and round cylindrical structure (RCS) of the microtextures are researched and added in this mixed lubricating zone to reduce both Fsc and Ffsc. Research indicates that both HS and RCS improve the lubrication and friction better than without microtextures (WMT). Besides, HS’s performance in improving the lubrication and friction is also better than RCS. Especially, with the optimised HS using rt = 1.4 mm and ht = 10
  Keywords: engine power; crank pin bearings; load capacity; frictional force; microtextures; hemispherical structure; round cylindrical structure; RCS.
  DOI: 10.1504/IJSURFSE.2024.10065740
   
  
• Investigation on the Salt Electrochemical Corrosion Resistance of a Robust Superhydrophobic Thin Film with Controllably Inlaid Micro/Nano Composite Structures  
  by Zheng Tan, Wenxin Tan, Zhiming Zhu, Jiayu Li, Li Zhang, Bo Hao 
  Abstract: In recent years, researches on the preparation of superhydrophobic thin films with the assistance of laser texturing to improve the corrosion resistance have been advancing rapidly. In this study, a controllable biomimetic superhydrophobic thin film preparation method was designed, in which a micron grid groove
  Keywords: micro/nano composite structures; laser texturing; superhydrophobic thin film; robustness; salt electrochemical corrosion resistance.
  DOI: 10.1504/IJSURFSE.2024.10065741
   
  
• Non-contact surface roughness measurement of blasted specimens using machine vision technique  
  by Kyungmok Kim 
  Abstract: This article describes non-contact surface roughness measurement for shot and grit blasted specimens. A simple machine vision algorithm was proposed for determining ten-point mean roughness (Rz) of a specimen after shot and grit blasting. Surfaces cleaned with different blast abrasives were captured by a microscope. Binary images were then created by using Otsu’s thresholding method. On the binary image, bright regions were selected, associated with specular reflection of light. The average size of selected regions was calculated in this proposed method. It was found that the average size has a linear relation with ten-point mean roughness of both shot and grit blasted surfaces. It was also identified that the parameter of a linear regression for shot blasting is different from that for grit blasting. On the basis of the relation, it is possible to determine the ten-point mean roughness of a blasted surface with a captured surface image.
  Keywords: shot blasting; grit blasting; machine vision; surface roughness.
  DOI: 10.1504/IJSURFSE.2024.10065742
   
  
• Enhancing Tribological and Corrosion Performance of SLM fabricated AlSi12Mg Components through Ultrasonic Assisted Magnetic Abrasive Finishing  
  by RAJU MARABOINA, Vamsi Krishna Pasam 
  Abstract: Selective Laser Melting (SLM) is one of the most important Additive Manufacturing (AM) techniques, which produces complex parts through layer-by-layer fabrication. However, some crucial issues such as poor surface quality and lack of dimensional accuracy that directly affect wear resistance, hardness, and corrosion properties, must be addressed before SLM parts can be widely used in real-time applications. Ultrasonic Assisted Magnetic Abrasive Finishing (UAMAF) is a hybrid finishing process that combines ultrasonic vibrations with traditional Magnetic Abrasive Finishing (MAF) processes to process surfaces up to nanometre scale in the least possible time. This paper focuses on developing UAMAF framework and finishing SLM-produced parts made of AlSi12Mg alloy with unbonded silicon carbide abrasives. EDAX analysis showed no change in elemental composition when UAMAF combined with grinding was employed and the drop in hardness was 6.34% and 24.94% in non-heat-treated and heat-treated samples, respectively. Wear tests conducted on these samples revealed that the heat-treated ground-finished samples were less prone to the total wear.
  Keywords: UAMAF; SLM; Micro hardness; Wear analysis; Corrosion analysis; SiC abrasives.
  DOI: 10.1504/IJSURFSE.2024.10066299
   
  
• Diffusion mechanism of cutting Ni-based alloy with carbide tool based on Molecular Dynamics simulation  
  by ZhaoPeng Hao, Gang Cheng, YiHang Fan, He Lan 
  Abstract: Nickel-based alloy Inconel 718 is difficult-to-cut and diffused seriously in cutting process. Its structure contains many complex atoms, such as Ni, Fe, Cr, etc. it is of great significance to study its diffusion wear mechanism under micro conditions. In this paper, a molecular dynamics model based on Ni, Fe and Cr is established. Through Ovito visualization, the phenomenon of atomic displacement is found in cutting, and the mean square displacement is used to solve the diffusion coefficient, the pre exponential factor and the transfer energy of atoms. MD method is used to make vacancy, The gap formation energy of WC Co tool and workpiece at grain boundary and lattice, and the diffusion activation energy barrier were calculated. The diffusion mechanism of Ni, Fe and Cr atoms is revealed by comparing with the experimental phenomena.
  Keywords: Ni-based alloy; Cemented carbide tool; cutting process ?Diffusion wear mechanism?Diffusion activation energy.
  DOI: 10.1504/IJSURFSE.2024.10066300
   
  
• Investigation on the transient asperity contact behaviors of water-lubricated bearing under start-stop cycle  
  by Tianyou Yang, Guo Xiang, Cheng Wang, Liwu Wang, Hang Jia, Jiaxu Wang 
  Abstract: The main purpose of this study is to assess the transient lubrication performances and dynamic behaviours of water-lubricated bearings during start-stop cycle based on the numerical prediction. The transient mixed lubrication model coupled with dynamic equation during start-stop cycle is established, in which the asperity contact and elastic deformation are considered. The effectiveness of the present numerical simulation is verified by the comparisons with the published test results. Based on the numerical study, the transient asperity contact and dynamic behaviours under different radial clearances and acceleration time are revealed. The results demonstrate that at the initial and end time during the start-stop cycle; the asperity contact is more serious. That is because the hydrodynamic water film is not quite formed at the initial start-up period and at the shut-down period the hydrodynamic water film is going to disappear. As a result, during this period, the external load is mainly shared by the contact load. Especially when the radial clearance is small, the asperity contact is more serious. In addition, under longer acceleration time, the journal trajectory shows better consistency of the start-up and shut-down conditions.
  Keywords: start-stop cycle; water-lubricated bearing; asperity contact; mixed lubrication.
  DOI: 10.1504/IJSURFSE.2024.10067455
   
  
• Simulation analysis and experimental study on the friction characteristics of hexagonal texture on the surface of PA66 material  
  by Wusheng Tang, Yu Fei Nie, Zhiyi Lu, Yingyu Du, Yaochen Shi, Ning Ding 
  Abstract: Starting from reducing the vibration and noise of automotive timing belt transmission systems, explore whether texture can improve the friction characteristics between non-metallic friction pairs, a hexagonal texture was designed and processed on a PA66 nylon plate to form a friction pair with chloroprene rubber material for reciprocating friction tests. By combining numerical analysis and experimental research, it is proved that hexagonal texture can improve the stress distribution and concentration strength of the friction interface between PA66 and chloroprene rubber materials during the friction process, inhibit continuous vibration of the interface, thereby reducing vibration acceleration amplitude and noise level. In addition, when the texture spacing is moderate, with the increase of texture width, the vibration reduction and noise reduction effects are more prominent, but the individual effect of texture depth is not significant. This is of certain significance for reducing the vibration and noise of synchronous belt transmission systems.
  Keywords: contact characteristics; frictional vibration; finite element analysis; friction noise; hexagonal texture.
  DOI: 10.1504/IJSURFSE.2024.10067456
   
  
• Investigation on Salt Corrosion Resistance of Bioinspired Robust Slippery and Superhydrophobic Surface of Al-Mg alloy  
  by Zhihui Xing, Jinghan Liu, Zheng Tan, Na Wang, Lei Fan, Li Zhang 
  Abstract: Aluminium-magnesium alloys are widely used in the fields of automobiles, architecture, healthcare, and electronics. The surface facial mask can effectively inhibit the direct contact between the metal substrate and the corrosive medium, thus reducing the corrosion rate and preventing corrosion. Based on biomimetic principles, this study used a hybrid method of laser texturing and surface spraying to prepare a superhydrophobic surface with a micro grid
  Keywords: slippery and superhydrophobic surface; hybrid method of laser texturing; robustness; salt corrosion resistance; Al-Mg alloy.
  DOI: 10.1504/IJSURFSE.2024.10067457