Article
Polymer Science
Pyoung-Chan Lee, Su Young Kim, Youn Ki Ko, Jin Uk Ha, Sun Kyoung Jeoung, Donghyeok Shin, Jung Hoon Kim, Myeong-Gi Kim
Summary: This study aims to improve the frictional properties of PA46 by adding graphene. The nanocomposites prepared through self-adsorption showed lower coefficient of friction and superior mechanical properties compared to those prepared by direct compounding. This can be attributed to the uniform dispersion of graphene and the strong attractive force between the PA46 matrix and graphene.
Review
Materials Science, Multidisciplinary
Wei Zhang
Summary: B4C ceramics have excellent properties but suffer from poor friction performance, restricting their application in wear resistance. This review systematically covers the research progress and strategies to improve tribological properties of B4C ceramics, along with proposing future research directions.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Engineering, Mechanical
Pranav Dev Srivyas, M. F. Wani, Rakesh Sehgal, Chandra Shekhar Singh Bisht, M. S. Charoo, Ankush Raina, Mir Irfan Ul Haq
Summary: The study suggests that the combination of graphene as a solid lubricant and surface texturing can effectively reduce friction and wear in hybrid aluminum composite and chromium plated chrome steel tribopairs. Textured surfaces consistently showed lower coefficient of friction and wear volume compared to non-textured surfaces under both dry sliding and lubricated conditions.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
M. Om Prakash, G. Raghavendra, S. Ojha, Manoj Panchal, Dheeraj Kumar
Summary: This study explores the use of porous nano activated carbon materials derived from waste biomass as reinforcements in epoxy composites. Results show that the inclusion of activated carbon enhanced the wear resistance of composites, with the lowest wear rate observed in composites with 2% filler loading. Regardless of the filler content, all composites displayed semi-ductile erosion wear behavior, with the 2% activated carbon epoxy composites showing the best abrasive wear resistance on the P800 abrasive surface.
Article
Materials Science, Coatings & Films
Hongfei Chen, Biao Hu, Jingwen Wang, Jiaqi Wang, Yanfeng Gao
Summary: A series of Ti3AlC2 enhanced NiCrAlY/Cr3C2 self-lubricating coatings were prepared by atmospheric plasma spraying on TC4 titanium alloy substrates. The coatings with 20 wt% Ti3AlC2 exhibited the lowest friction coefficient and wear rate at 800 degrees C. The high-temperature decomposition products of Ti3AlC2 played a positive role in reducing the friction coefficient and wear rate of the coating and endowed it with a self-healing ability.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Civil
A. Palanisamy, N. Jeyaprakash, V. Sivabharathi, S. Sivasankaran
Summary: The study focused on heat treatment of Incoloy 800H superalloy and analyzed its mechanical and tribological behavior. The air-cooled sample showed better performance with higher hardness and wear resistance compared to the as-received and furnace-cooled samples.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Engineering, Mechanical
Zhibin Lin, Ke Zhang, Peng Tao, Bingzhao Gao, Xiaogang Zhao, Xuemei Zong, Zhikai Chen, Zhihui Zhang
Summary: The hybrid wear system consisting of independent PEEK and PTFE components sliding against steel can improve the tribological performance of PEEK without compromising its mechanical properties. The roughness of the countersurface has a significant impact on the formation of tribofilms and the overall tribological performance of the hybrid wear system.
Article
Engineering, Mechanical
Auezhan Amanov
Summary: The study investigated the influence of UNSM temperature on the tribological properties of Ti-6Al-4V alloy, finding that COF was reduced and wear resistance enhanced due to increased strength and smoothed surface. Abrasive wear caused the most damage in the wear track of the sample, with wear mechanisms comprehensively investigated based on experimental data and microstructural images.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Shahid Manzoor Wani, Babar Ahmad, Sheikh Shahid Saleem
Summary: In this study, Ni-Co-BN coatings were deposited on Aluminium-Silicon using the PVD technique and their composition and morphology were investigated. Mechanical and nano-wear studies were conducted to understand the effect of load on reduced modulus, hardness, and wear rate of the coating. The results showed a decrease in reduced modulus and hardness with increasing load, while the wear rate increased. The smooth wear scars on the coated material suggested its suitability for bearing applications.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yuan Yu, Jun Wang, Jin-Shan Li, Hong-Chao Kou, Si-Zhe Niu, Sheng-Yu Zhu, Jun Yang, Wei-Min Liu
Summary: The study found that the AlCoCrFeNiTi0.5 alloy has better wear resistance than Fe77Ni23 solid solution alloy, Ti-46Al-2Cr-2Nb intermetallic alloy, or a wear-resistant steel AISI 52100, especially under higher loads. The wear rate increases slowly with increasing loads and remains steady at different sliding speeds. The wear mechanisms include abrasive wear, adhesive wear, and oxidative wear.
Article
Engineering, Mechanical
Da Guo, Peng Zhang, Yuanyuan Jiang, Chenfei Song, DeQiang Tan, Deping Yu
Summary: Surface texturing and laminar plasma jet surface hardening can greatly enhance the wear resistance of GCr15 bearing steel. The improvement in wear performance depends on the evolution of frictional interfaces and wear mechanisms.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Materials Science, Coatings & Films
Xianyong Zhu, Guozheng Ma, Zhengyu Ding, Honglin Mu, Zhongyu Piao, Ming Liu, Weiling Guo, Zhiguo Xing, Haidou Wang
Summary: In this study, a WC-10Co-4Cr-4CaF2 wear-resistant self-lubricating coating was prepared using HVOF, and its microstructure, element distribution, and tribological properties at different temperatures were investigated. The results showed that the coating exhibited good friction reduction performance at high temperatures and almost no wear at 400 degrees Celsius.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Bisma Parveez, M. F. Wani
Summary: This research work demonstrates the use of nano zirconia and MoS2 in strengthening and controlling the tribological properties of Fe-Cu-Sn based composites, fabricated using powder metallurgy technique. Analysis revealed the presence of influencing phases and significant improvement in friction and wear rates of composites with the addition of nano zirconia and MoS2, making them potential bearing materials.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Physical
Neonila Levintant-Zayonts, Grzegorz Starzynski, Stanislaw Kucharski
Summary: The hardness and tribological properties of D6A and C75S spring steels implanted with nitrogen ions were studied. It was found that the implanted samples went through two stages of wear process, with low friction coefficient and wear rate in the first stage, and considerably increased values in the second stage. The duration of the first stage depended on the applied load, with extended wear life at low contact pressure.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Can Wu, Zheng Liu, Huijun Zhao, Haining Yang, Xinglin Li, Jing Ni
Summary: Si3N4 hybrid bearings, due to their electrical insulation, high speed, low friction coefficient, and wear resistance characteristics, are considered the most promising motor bearings for electric vehicles. However, the tribological mechanism between the ceramic-grease-steel complex interface is not clear. Three kinds of greases, namely lithium, polyurea, and calcium sulfonate complex grease, were synthesized from poly alpha olefin 40 as base oil. The effects of grease thickener morphology on the tribological properties of Si3N4/GCr15 contact surfaces at different slip speeds were investigated, and the vibration and friction torque performances in 6204 hybrid ceramic balls were evaluated. The results showed that the thickener could form physical deposition film and friction film to protect the worn surface at low speed. The friction and wear conditions were significantly improved at high speed under lithium grease and polyurea grease lubrication, being a mixed lubrication state. In presence of lithium grease, the tribological performance of the Si3N4/GCr15 interface and the vibration performance, impacted condition, starting torque, and friction torque of the hybrid ceramic ball bearings were all the best. Because lithium grease is subjected to continuous shear of the ceramic ball, which releases the base oil stably, and forms a thick oil film with the broken thickener in the center of the raceway, the bearing is in a mild lubrication state. Therefore, for Si3N4 hybrid ceramic ball bearings, lithium grease is a lubricant with good application prospects.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Katarina Monkova, Martin Vasina, Peter Pavol Monka, Drazan Kozak, Jan Vanca
Article
Chemistry, Physical
Katarina Monkova, Martin Vasina, Milan Zaludek, Peter Pavol Monka, Jozef Tkac
Summary: This article investigates the influence of cell size and volume ratio of a body-centered cubic (BCC) lattice structure made from ABS plastic on mechanical vibration damping and compression properties. The experimental results indicate a correlation between the stiffness and mechanical vibration damping of the ABS samples studied.
Article
Engineering, Mechanical
Katarina Monkova, Marek Urban, Peter Pavol Monka, Drazan Kozak
Summary: This study focuses on the wear and damage development of critical components - levers in hydrodynamic thrust bearings under quasi-static loading, and the impact of surface treatment on them. Experimental tests showed that electroless nickel-plated samples performed the best in terms of surface treatment, resulting in the successful production of real levers in three different sizes.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Polymer Science
Katarina Monkova, Martin Vasina, Peter Pavol Monka, Jan Vanca, Drazan Kozak
Summary: This paper studies the sound reflection behavior of four different types of 3D-printed open-porous polylactic acid (PLA) material structures and evaluates the impact of various factors on their sound reflection performance.
Article
Materials Science, Multidisciplinary
Monika Vargova, Miroslava Tavodova, Katarina Monkova, Miroslav Dzupon
Summary: This study aims to investigate methods to improve the resistance to abrasive wear of ploughshare materials. Through chemical analysis, it was found that the ploughshare body is made of S355J2G3 steel and the raking blade material is made of 37MnSi5 steel. The materials were evaluated using abrasion resistance tests and parametric statistical hypothesis testing.
Article
Engineering, Mechanical
Katarina Monkova, Marek Urban, Stefan Moravka, Peter Pavol Monka, Zeljko Bozic
Summary: Thrust bearings are crucial parts of turbines and compressors. This research focuses on designing a new lever geometry for a selfequalising thrust bearing to ensure its functionality and reliability in real conditions.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Peter Pavol Monka, Katarina Monkova, Martin Vasina, Milena Kubisova, Martin Korol, Adriana Sekerakova
Summary: This article investigates the influence of tool geometry and cutting conditions on the chip characteristics in slow-rate machining of steel. Experimental results and statistical analysis reveal the behavior of temperature and microhardness, allowing the identification of optimal machining conditions.
Article
Materials Science, Multidisciplinary
Peter Pavol Monka, Katarina Monkova, George A. A. Pantazopoulos, Anagnostis I. I. Toulfatzis
Summary: This research aims to study the frequency response of the machining system to different values of tool wear and cutting speed, as well as the effect of artificial wear and cutting speed on vibration and chip shape characteristics. The experimental results showed that brass alloys CW510L and CW614N have lower vibration damping compared to CW724R, while relatively good chip formation was observed in the evaluated machining conditions without a chip breaker. The problematic chip shape only occurred in some cases with CW510L and CW724R, and cannot be generalized.
Article
Engineering, Aerospace
Katarina Monkova, Peter Pavol Monka, Milan Zaludek, Pavel Beno, Romana Hricova, Anna Smeringaiova
Summary: The influence of the volume ratio of a complex porous structure on bending properties was examined. It was found that the structure with a relative weight of 30% was the most suitable for bent components.
Article
Chemistry, Physical
Katarina Monkova, Peter Pavol Monka, George A. Pantazopoulos, Anagnostis I. Toulfatzis, Anna Smeringaiova, Jozef Torok, Sofia Papadopoulou
Summary: The development of additive technologies brings new possibilities and challenges, particularly in the use of regular cellular materials to fully utilize the potential of porous structures. This article focuses on investigating the mechanical properties of porous structures made by Direct Metal Laser Sintering (DMLS) of Inconel 718. Two types of basic cell topology, mono-structure Gyroid (G) and double-structure Gyroid + Gyroid (GG), were studied at different material volume ratios. The results show that the mono-structure Gyroid at 10% displayed the best behavior under compression load.
Article
Polymer Science
Katarina Monkova, Peter Pavol Monka, Romana Hricova, Berenika Hausnerova, Lucia Knapcikova
Summary: This article compares the behavior of four lattice structures under tensile stress loading. The results show that the topology and specific volume significantly affect the ABS properties. The Cartesian structure is the most suitable for tensile stress, while the Rhomboid structure is the least suitable. The Rhomboid structure absorbs the most energy and has the highest toughness, suggesting the need for further investigation of its behavior under impact testing.
Proceedings Paper
Engineering, Mechanical
Ashokkumar Ravichandiran, Peter Pavol Monka, Katarina Monkova, Monika Hromasova
Summary: The disintegration of material surfaces exposed to pulsating water jet is influenced by technological parameters and interacting surface properties. Surface modification through various machining operations results in different surface roughness, causing varied shear stress-induced material erosion during the lateral jetting phase. The study found that the disintegration depth of materials follows a bell curve pattern with increasing standoff distance.
ADVANCES IN MANUFACTURING ENGINEERING AND MATERIALS II, ICMEM 2020
(2021)
Proceedings Paper
Engineering, Aerospace
Katarina Monkova, Peter Pavol Monka, Jan Vanca, Romana Hricova, Lucia Knapcikova, Drazan Kozak, Pavel Beno
Summary: This paper discusses the modal analysis of a sample with a simple lattice structure obtained by multiplying a simple Body Centered Cubic cell in three directions. Five samples were produced using ABS material and 3D printing technology. The study involved experimental investigation of natural frequencies up to 750 Hz and numerical analysis of the first five natural modes and frequencies up to 1500 Hz. Comparison of numerical and experimental results showed relatively high agreement, providing a basis for further research.
2021 12TH INTERNATIONAL CONFERENCE ON MECHANICAL AND AEROSPACE ENGINEERING (ICMAE)
(2021)
Proceedings Paper
Construction & Building Technology
Katarina Monkova, Marek Urban, Peter Pavol Monka, Stefan Moravka, Zeljko Bozic
Summary: This research conducted numerical analysis on the design of a new self-equalizing thrust bearing, confirming the rationality, stiffness, functionality, and reliability of the lever design.
4TH INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY AND DURABILITY (ICSID 2020)
(2021)
Article
Automation & Control Systems
Peter Pavol Monka, Katarina Monkova, Vidosav D. Majstorovic, Zeljko Bozic, Andrej Andrej
Summary: The article focuses on determining the most suitable machining parameters for deep groove machining with three newly designed end mills. Online vibration analysis was used as a tool for experimentation. The study found that the four-tooth cutter 01-FVT is the best tool for milling deep-shaped grooves when machining 16MnCr5 steel.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)