Article
Chemistry, Physical
Dominika E. Zakrzewska, Marta H. Buszko, Alicja K. Krella, Anna Komenda, Grzegorz Mordarski, Robert P. Socha
Summary: Cavitation erosion is a common occurrence in many industries, leading to the search for methods and parameters to minimize its effects on materials. Studies have shown that a lack of incubation time during cavitation tests can result in a linear increase in losses, with observed damages overlapping to widen the erosion area and compromise the coating's integrity.
Article
Materials Science, Multidisciplinary
Ji Liu, Tongzhou Chen, Chengqing Yuan, Xiuqin Bai
Summary: This study investigates the performance of cobalt-based coatings in cavitation erosion (CE) and corrosion resistance. The results show that cobalt-based alloy coating exhibits the best CE resistance in NaCl solution and has the potential to prevent CE in seawater. On the other hand, WC-17Co coating shows superior CE resistance in deionized water but is more susceptible to corrosion in NaCl solution.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Engineering, Mechanical
Alicja K. Krella, Jaroslaw Grzes, Andreas Erbe, Marthe Folstad
Summary: The research hypothesized that the structure of the coating affects its mechanical and electrochemical properties, as well as resistance to cavitation erosion and corrosion. Nickel coatings produced using two different electrolytes on X20Cr13 steel were tested. The coatings exhibited different structures and properties, with one having cracks and the other a cauliflower-like structure. Both coatings provided protection against cavitation erosion, with the one having cracks and high hardness showing the lowest erosion rate. Microscopic examinations showed no influence of the cracks on the degradation process. Electrochemical tests confirmed that the compact coating had better corrosion resistance compared to the agglomerate coating. The agglomerate coating had electrochemical parameters similar to the substrate.
Article
Engineering, Mechanical
Alicja Krella, Artur Marchewicz
Summary: The mechanical properties of CrN/CrCN multilayer ceramic coatings have been found to affect cavitation degradation and surface roughness. Increasing the thickness of the CrCN layer improves the hardness and Young's modulus of the coatings, but decreases the force at which cracks appear. The H3/E2 ratio is a better indicator of erosion rate and eroded area than the H/E ratio. Surface roughness and erosion rate may not have a consistent correlation due to the influence of degradation mechanisms.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yang Li, Ying Lian, Yanjun Sun
Summary: Friction stir processing can refine the microstructure of as-cast nickel aluminum bronze alloys, improve cavitation erosion resistance, but also increase sensitivity to corrosive media in artificial seawater. The synergistic effect plays a significant role in the performance of FSP NAB alloy.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Coatings & Films
Xinlong Wei, Wuyan Zhu, Aolin Ban, Dejia Zhu, Chao Zhang, Hongbiao Dong
Summary: This paper investigates the effect of Co element addition on cavitation erosion resistance of TiNi based coating deposited by atmospheric plasma spraying (APS). The results show that appropriate addition of Co element can reduce porosity of TiNi based coating and achieve a denser microstructure, leading to improved cavitation erosion resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Acoustics
Yangjun Wang, Ziyuan Li, Limei Tian, Zhen Shang
Summary: Research shows that the elastic modulus of a boundary can have an impact on cavitation erosion. By using single-layer samples with different chemical composition and moduli, as well as double-layer samples with different elastic moduli but the same surface layer material, the direct relationship between the elastic modulus of the boundary and cavitation erosion was studied. The results indicate that the coating's chemical composition and mechanical properties together affect the cavitation morphology, and the dominant factors vary with erosion stage. The study also found a positive correlation between the elastic modulus of the coating and the degree of cavitation, providing theoretical and technical guidance for the application of anti-cavitation coatings in engineering.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Materials Science, Ceramics
Sheng Hong, Jinran Lin, Yuping Wu, Jianhua Wu, Yuan Zheng, Yuquan Zhang, Jiangbo Cheng, Wei Sun
Summary: The study found that WCN coating exhibited higher hardness and elastic modulus, lower volume loss rate, and enhanced CE resistance compared to CN coating in NaCl medium. Increasing flow velocity led to higher volume loss rates for both coatings.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Qi Liu, Zhen Li, Sanming Du, Zhitao He, Jiesheng Han, Yongzhen Zhang
Summary: The cavitation erosion behavior of GH 4738 nickel-based superalloy was found to be better than that of Inconel 601 alloy, with selective cavitation erosion and cavitation-induced nanometer-scaled precipitates observed on the eroded surface of GH 4738. The formation of precipitates and the pinning effect of precipitates help slow down the erosion damage through absorbing the bubbles collapse energy, contributing to a better understanding of the effect of precipitates on materials cavitation erosion resistance.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Marine
Peng Chi, Zhang Shilong, Fu Jianhong, Li Qinfeng, Su Yu, Chang Hao, Chen Yuxuan, Yang Yun
Summary: This study investigates the feasibility of using a cavitation jet for drilling and stimulating shale gas reservoirs, and conducts erosion experiments on shale under different hydraulic conditions. The study finds that the optimal nozzle position increases linearly with upstream pressure, and a higher upstream pressure results in a greater erosion rate. The study also discusses the erosion mechanism and the impact of erosion time on reservoir permeability.
Article
Materials Science, Multidisciplinary
Jinran Lin, Sheng Hong, Yuan Zheng, Wei Sun, Min Kang, Xiuqing Fu
Summary: High-velocity oxygen-fuel spraying was used to deposit WC-10Ni (WN) and WC-10Co-4Cr (WCC) powders as coatings on a 1Cr18Ni9Ti stainless steel substrate. Despite having higher hardness and elastic modulus, the WN coating exhibited better resistance to corrosion in NaCl medium compared to the WCC coating. Both WN and WCC coatings showed an increase in volume loss rates as flow velocity in NaCl medium increased, and the corrosion mechanisms were compared and revealed.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Engineering, Mechanical
A. K. Krella
Summary: Different PVD deposition techniques have varying impacts on coating structure and degradation processes, with deposition technique having a higher influence on droplet density than the deposited compound. TiN coatings deposited by CAE-PVD technique have the highest droplet density, while W-based coatings deposited by RMS-PVD technique have the lowest. Cavitation erosion causes phase transformation in the steel substrate and the intensity of this transformation depends on the deposition technique and the density of droplets on the coating surface.
Article
Engineering, Mechanical
Ye Tian, Hang Zhao, Rui Yang, Xiaomei Liu, Hua Li, Xiuyong Chen
Summary: This study evaluated the cavitation erosion behavior of nickel aluminum bronze (NAB) after exposure to Bacillus sp. biofilm in artificial seawater. The results showed that the biofilm could inhibit corrosion and retain the cavitation erosion resistance of NAB.
Article
Green & Sustainable Science & Technology
Abhishek Babu, G. Perumal, H. S. Arora, H. S. Grewal
Summary: The study found that deep cryogenic treatment of WC-10Co-4Cr coatings improved their resistance to slurry and cavitation erosion. The improvement was attributed to increased hardness and fracture toughness, reduced porosity, and enhanced hardness due to the presence of nano precipitates.
Article
Engineering, Multidisciplinary
Sheng Hong, Xinlu Shi, Jinran Lin, Yuping Wu, Jiahui Li, Yuan Zheng
Summary: This study investigates the effects of flow velocities (FVs) and sand concentrations (SCs) on the cavitation-silt erosion (CSE) behaviors of two hardfacing coatings. The WC-20(Cr3C2)-7Ni coating exhibits superior CSE resistance compared to the Cr3C2-25(NiCr) coating. Increasing FV and SC has a negative impact on the CSE resistance of both coatings.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Mechanical
Yankui Song, Ke Xiao, Guo Xiang
Summary: The novelty of this study lies in constructing an Entropy-based wear and fluid-solid-thermal (FST) coupled model for journal bearings, and revealing the transient interaction behavior between wear evolution and FST evolution during repeated starting and stopping. The wear rate is measured experimentally, and the contact temperature, friction coefficient and normal contact force are obtained from the validated FST model. Wear tests and numerical calculations are conducted to validate the predicted wear rate and investigate the time-varying wear and FST evolution of journal bearings.
Article
Engineering, Mechanical
Xin-long Liu, Xin Guan, Yuan Zhong, Qian Xiao, Yong Cao, Wu-lue Zhang, Song Zhang, Yi-ting Zheng, Ming-sheng Gao, Dao-yun Chen, Wen-bin Yang
Summary: Gaps in the conductor rail joints of intercity trains have an impact on current transmission and the wear of carbon skateboards. These gaps decrease the coefficient of friction, increase electrical contact resistance, and affect the wear rate of carbon skateboards.
Article
Engineering, Mechanical
Yuhang Wu, Conglin Dong, Xiuqin Bai, Chengqing Yuan
Summary: The study developed a new composite material by incorporating hexagonal boron nitride (h-BN) particles into a thermoplastic polyurethane (TPU) matrix, which exhibited excellent self-lubricating properties and reduced frictional excitation forces. The addition of h-BN particles effectively reduced the coefficient of friction, decreased fluctuation amplitude, enhanced wear resistance, and attenuated vibration behaviors.
Article
Engineering, Mechanical
Tiancheng Ouyang, Xiuyang Sun, Wentao Tang, Yinxuan Li, Zhi Qun Tian, Yanzhou Li
Summary: By adding nitrogen-doped graphene and C60 nanoparticles to the lubricant, a highly efficient nano-lubricant with vibration and noise reduction properties is synthesized.
Article
Engineering, Mechanical
Xin Zhuo, Jun Cao, Haibo Huang, Li Liu, Xinkun Suo, Peiqing Ye, Zeshan Abbas
Summary: A polymer coating prepared by liquid spraying technology on the surface of 20CrMo steel demonstrates good tribological and anti-cavitation erosive properties. It can effectively replace CuPb24Sn copper alloy in valve plates for pumps under different lubrication conditions. The coating exhibits adhesive wear and reduces frictional loss, and mainly shows abrasive wear under complex working conditions. Its lipophilicity, high hardness to elastic modulus ratio, and corrosion resistance are the main influencing factors for its performance.
Article
Engineering, Mechanical
Md. Aminul Islam, Jiaren (Jimmy) Jiang, Yongsong Xie
Summary: Erosion-corrosion is a major factor in material loss and reduced useful life of hydro-transport equipment. This study evaluates the erosion-corrosion characteristics of different materials and finds that matrix wear affects the degradation of carbides. Sufficient wear and corrosion resistance in the surrounding matrix are important for good erosion-corrosion resistance.
Article
Engineering, Mechanical
Andre Dubois, Oussama Filali, Laurent Dubar
Summary: This study investigates the effect of surface roughness, contact pressure, and lubrication on the onset of galling in aluminum 6082-T6 using a pin-on-plate tribometer. The experimental results show that the roughness and lubricants play a significant role in preventing galling.
Article
Engineering, Mechanical
Jizhan Wu, Peitang Wei, Guoqiang Liu, Difa Chen, Xiuhua Zhang, Taimin Chen, Huaiju Liu
Summary: This study conducted a comprehensive evaluation of the DLC coating treatment on the loading capacity of gears and characterized the surface features and fatigue performance. The results demonstrate that DLC coating significantly improves the hardness and surface residual compressive stress of the gears, as well as enhances their contact fatigue performance.
Article
Engineering, Mechanical
Yangping Liu, Hwaran Lee, Annsley Mace, Jeremy L. Gilbert
Summary: An AFM-based single asperity tribology method was used to investigate the wear performance of carbides and base metal matrix in high carbon CoCrMo alloy. The wear behavior of the two types of carbides was stress-dependent and influenced by chemical composition. Cr-rich carbides exhibited higher wear resistance compared to Mo-rich carbides.
Article
Engineering, Mechanical
Zdenek Riha, Michal Zelenak, Akash Nag, Jakub Poloprudsky, Tomas Kruml, Sergej Hloch
Summary: This study investigates the erosion performances of a high-speed modulated jet (MWJ) and continuous water jet (CWJ). By comparing different nozzles and water jet powers, the effects of modulated and continuous jets on aluminum alloy were studied. The results show that under certain conditions, modulated jet can create deeper and sharper grooves while reducing the impact of lateral flow.
Article
Engineering, Mechanical
Chunyu Yu, Weipu Li, Yang Guo, Xianbin Sun, Fanli Hong, Ning Sun, Qinghai Zhang
Summary: This study explores the relationship between the wear rate of train brake pads and its features, and proposes a method for predicting the wear rate suitable for small sample data. Grey relational analysis and Pearson correlation analysis are used to determine the preferred features that affect the wear rate, and a BOA-BP model is established for prediction. The results show that BOA-BP exhibits better advantages in prediction with small samples.
Article
Engineering, Mechanical
Shan Yin, Xin Zhao, Shuangchao Huang, Zefeng Wen, Xuesong Jin
Summary: This study simulated the rolling contact of a driving wheelset over tangent and curved tracks at a speed up to 500 km/h using an explicit finite element approach to derive creep curves. The comparison between quasi-steady curves and transient curves in the presence of rail corrugation helped to identify cases where traditional theories are inapplicable and where transient effects must be considered. Additionally, the study further analyzed the influence of middle/high-frequency vibrations in the presence of rail corrugation.
Article
Engineering, Mechanical
Jiyao Zhang, Yuanlie Yu, Junlei Tang, Yingying Wang, Honggang Sun, Kaikai Song, Jianhong Gong, Pingping Liu, Xiaoming Liu, Lina Hu, Parthiban Ramasamy, Juergen Eckert
Summary: The influence of high-carbon addition on the microstructure, hardness, and wear behavior of CoCrNi alloy was investigated. It was found that the addition of carbon resulted in the formation of carbide particles, enhancing the hardness and improving the wear resistance. Fracture and detachment of hard carbides during friction introduced additional abrasive particles, transitioning the wear mechanism from adhesive-dominated to abrasive-dominated.
Article
Engineering, Mechanical
Yanfei Liu, Shengtao Yu, Ruize Zhang, Xiangyu Ge, Wenzhong Wang
Summary: This study reports the tribological behavior of nanodiamond plate (NDPL) as a nanoadditive for the first time and compares it with nanodiamond particles (NDPA). The results show that NDPL provides better lubrication performance at higher concentrations, and the sliding between NDPLs and the structural transformation from sp3 to sp2 carbon play a crucial role in lubrication and wear resistance.