Synthesis and Characterization of Al-18Si-3.6Cu-0.34Ce Alloy Prepared by Conventional Casting Method | Chapter 7 | Current Innovations in Chemical and Materials Sciences Vol. 4

 In the investigation, an exertion was made to find the machinelike and wear properties of a heat-treatable hypereutectic usually metallic-silicon alloy. The alloy was inclined by the unoriginal casting design in the form of ingots, then the synthetic compositions of the alloy were resolved by a spectro-spark emission spectrometer. The as-cast alloy test samples are T6 heat discussed by solutionizing at 500oC for 1 period, followed by water quenching and isothermal fading treatment at 210oC for various aging opportunities. The tensile test was completed activity for as-cast and cast-aged environments accompanying different crumbling times of 1h, 3h, 5h, and 7h. It was noticed from the tensile test that the final tensile strength of 1h (193.83 MPa) and 3h (168.68 MPa) old (T6 treated) samples revised the UTS by 22% and 7%, individually, as compared to the cast sample (158 MPa). For the preferred alloy at as-cast and cast-aged environments the dry sliding wear test was acted at distinct accelerating speeds (1 m/s, 2 m/s, 3 m/s, and 4 m/s) by varying loads of 10–40 N each gliding speed. From the wear study it is confirmed that wear rate and cooperative of friction are load-reliant. In spite of bigger sliding speeds and loads, lower resistance was noticed.

Author(s) Details:

Krishnaraddi Gangal,
Department of Mechanical Engineering, Rural Engineering College, Hulkoti-582205, India.

Devendra K.,
Department of Mechanical Engineering, SKSVMACET, Laxmeshwar, India.

Chandrashakar Kaggalagowdra,
Department of Mechanical Engineering, SKSVMACET, Laxmeshwar, India.

Please see the link here: https://stm.bookpi.org/CICMS-V4/article/view/12978

Wear of High-Technology Coatings, Deposited by High-Velocity Oxygen Flame (HVOF)| Book Publisher International

 One of the methods for decreasing the wearing degree in contacting joints and increasing the resource of the machines and the mechanisms is the deposition of composite powder coatings of super-alloys using the supersonic flame jet (HVOF –High-Velocity Oxy-Fuel). Using this contemporary technology one obtains coatings, which have considerably improved mechanical and tribological characteristics – high adhesion strength of bonding with the substrate, density, hardness, wear resistance, and corrosion stability.

The subject of the present book is the processes and the mechanisms of wearing the composite powder coatings of super-alloys, deposited by a high-velocity flame jet - HVOF at a velocity of the flame jet 1000 m/s of powder composites, containing micro-particles having different chemical compositions – nickel, tungsten, boron, silicon, manganese, and others. in various percentages of their content and different sizes of the powder particles.

Author(s) Details:

Mara Kandeva,
Faculty of Industrial Engineering, Tribology Center, Technical University – Sofia, 8, Kl. Ohridski Blvd, 1756 Sofia, Bulgaria.

Zhetcho Kalitchin,
SciBulCom2 Ltd., 2A, Yakubitza Str., 1164 Sofia, Bulgaria.

Yana Stoyanova
Faculty of Industrial Engineering, Tribology Center, Technical University – Sofia, 8, Kl. Ohridski Blvd, 1756 Sofia, Bulgaria.

Please see the link here: https://stm.bookpi.org/WHTCDHVOF/issue/view/802

Tribological Evaluation of Turbostratic 2D Graphite as Oil Additive: A Recent Study| Chapter 1 | New Trends in Physical Science Research Vol.4

This research used powder technique to make Fe-SiC composites. SiC particles operate as precursors, causing a significant amount of turbostratic graphite to be distributed throughout the composite matrix. The temperature and composition range for stabilising the graphite phase in iron with a high yield were determined using Thermo-Calc® software. The recovered turbostratic 2D graphite particles were mixed in mineral oil to see if they might be used as a lubricating oil additive. The structure and morphology of the extracted graphite were studied using Raman spectroscopy and transmission electron microscopy (TEM), demonstrating the extremely disordered nature of turbostratic graphite. The friction coefficient and wear rate of a tribological pair were reduced when compared to pure mineral oil and mineral oil with commercial graphite particles added. There is limited contact between these atomic planes in turbostratic 2D graphite due to the misorientation and increase in interplanar distances, resulting in a low friction coefficient and decreased wear rate.

Author(s) Details:

Halley W. J. Dias,
Laboratorio de Materiais, Departamento de Engenharia Mecanica, Universidade Federal de Santa Catarina, Florianopolis, 88040-900, Brazil and Instituto Federal de Ciencia e Tecnologia de Santa Catarina/Campus Ararangua, Ararangua, 88905-112 , Brazil.

Alessandra B. Medeiros,
Laboratorio de Materiais, Departamento de Engenharia Mecanica, Universidade Federal de Santa Catarina, Florianopolis, 88040-900, Brazil.

Cristiano Binder,
Laboratorio de Materiais, Departamento de Engenharia Mecanica, Universidade Federal de Santa Catarina, Florianopolis, 88040-900, Brazil.

Joao B. Rodrigue Neto,
Laboratorio de Materiais, Departamento de Engenharia Mecanica, Universidade Federal de Santa Catarina, Florianopolis, 88040-900, Brazil.

Aloisio N. Klein,
Laboratorio de Materiais, Departamento de Engenharia Mecanica, Universidade Federal de Santa Catarina, Florianopolis, 88040-900, Brazil.

Jose Daniel B. de Mello,
Laboratorio de Materiais, Departamento de Engenharia Mecanica, Universidade Federal de Santa Catarina, Florianopolis, 88040-900, Brazil and Universidade Federal de Uberlandia, Laboratorio de Tribologia e Materiais, Uberlandia,38400-902, Brazil.

Please see the link here: https://stm.bookpi.org/NTPSR-V4/article/view/6926

Study on the Effect of Nitriding on Wear Behavior of Graphite Reinforced Aluminum Alloy Composites | Chapter 04 | Novel Perspectives of Engineering Research Vol. 6

 The influence of nitriding on the wear behaviour of graphite reinforced aluminium 6061 alloy composites is investigated in this work. Al alloys have several advantages over nonmetallic materials, including light weight, corrosion resistance, workability, and thermal conductivity. The liquid metallurgy process was used to make the composites. The graphite content of the composites was changed in 2 percent increments from 3 to 7 percent (by weight). For 24 hours, the nitriding process was carried out at 500°C. The wear behaviour of three types of specimens, namely nitrided composites, non-nitrided composites, and alloy specimens, was investigated. For wear testing, pin-on disc equipment was employed. The implantation of nitrogen in the composites was confirmed using the X-Ray Diffraction method (XRD). It was discovered that nitrided composites outperform non-nitrided composites in terms of wear resistance. It may be deduced that the efficiency of the graphite particles in lowering the wear rate of composite materials is determined by the capacity of the sheared reinforcing layers to stick to the sliding surface.

Author(S) Details

B. M. Girish
Department of Mechanical Engineering, Alliance College of Engineering and Design, Alliance University, Bangalore-562106, Karnataka, India.

B. M. Satish
Department of Mechanical Engineering, Sree Vidyanikethan Engineering College, Tirupati-517102, Andra Pradesh, India.

H. R. Vitala
Department of Mechanical Engineering, SJB Institute of Technology, Bengaluru-560060, Karnataka, India.


View Book:- https://stm.bookpi.org/NPER-V6/article/view/5498

Determining the Importance of Polarity Change in the Electrical Discharge Machining | Chapter 6 | New Visions in Science and Technology Vol. 3

The polarity change in spark erosion is still a concern, and it is frequently done in an arbitrary or unjustified manner. The removal electrode must be given the polarity indication first. This is often the cathodic workpiece electrode in EDM. The goal of this chapter is to describe the removal circumstances on the anode and cathode, as well as to explain how both electrodes' removal behaviour changes over time. The reversal point of the pulse duration may be established as a result of this, which is significant for the electrode material combination, the process energy source (PES), and the load circumstances. In order to validate the phenomenological models, experimental results with copper, aluminium, and iron are evaluated in combination with the same and various electrode materials. In the second stage, literature references are reviewed with the goal of determining whether or not there has been a polarity shift. The direct polarities are chosen largely to optimise removal while minimising wear. Second, reversal polarities are employed in finishing to achieve reduced surface roughness. A high level of wear must always be accepted in these applications, which account for the vast majority of the literature. The polarity of the PES and/or the load conditions of the PES is almost never mentioned in the literature, which leaves out a crucial aspect in the explanation of the results. The utilisation of electrical discharge in conjunction with other machining methods, such as electrochemical machining, necessitates a polarity change as well (ECM). An further impacting component is the primary removal process.

Author (S) Details

H. P. Schulze
Leukhardt Schaltanlagen Systemtechnik Magdeburg, Germany.

View Book :- https://stm.bookpi.org/NVST-V3/article/view/3724567

Analysis of Tribological Researches of Gear Cutting Processes of Cylindrical Gears in Real and Model Conditions | Chapter 2 | Current Approaches in Science and Technology Research Vol. 7

 The availability, adaptability, reliability, and productivity of modern industrial complexes, as well as maintenance costs, energy costs, and industrial production costs, are all affected by the intensity of wear of tribo-mechanical system elements. Gear cutting operations are typically a bottleneck in production, particularly in higher-level production. The presence of numerous parameters for monitoring the process development of their wear, as well as the selection of wear criteria, increases the complexity of the procedure for determining tribological properties of tribo-mechanical system elements from an economic standpoint.

Author (S) Details

Bogdan Sovilj
University of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia.

Sandra Sovilj-Nikić
Iritel a.d. Beograd, Batajnički put 23, 11080 Belgrade, Serbia

Ivan Sovilj-Nikić
University of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia.

View Book :- https://stm.bookpi.org/CASTR-V7/article/view/1812

Model of Fracture, Friction and Wear Processes of Heterogeneous Iron | Chapter 1 | Current Approaches in Science and Technology Research Vol. 1

 Pore volume, fracture character, contaminants, alloying, concentration inhomogeneity, friction conditions, and other factors all have an impact on the mechanical and tribotechnical properties of powdered materials. Pores also have an impact on the speed of diffusion processes and the reduction of undercooled austenite.anti-resistance To explore porous iron characteristics, ultrapure iron that has been annealed in hydrogen was employed. a powder Porosity has a nonmonotonic effect on toughness fracture and tribotechnical characteristics.Unlike all other known dependencies derived from technical iron powders. The results of research have been revealed. The fact that the average dimension of porous changes during the process of porosity reduction by pressing and annealing cycles. Models of friction, wear, and fracture of pure porous iron were produced based on the examination of porous structure.

Author (s) Details

Dr. A. A. Shatsov
Mechanical Technological Faculty, State National Research Politechnical University of Perm, 29 Komsomolskii Avenue, Perm 614990, Russia.

View Book :- https://stm.bookpi.org/CASTR-V1/article/view/1333

Polymer/steel Tribological Characteristics and Corrosion and Under External Voltages | Chapter 2 | Advanced Aspects of Engineering Research Vol. 11

 Metals are constantly in contact with their environment, whether it is air, vapour, water, or other chemicals, resulting in chemical interactions between metals and their respective environments, resulting in an insidious localised form of corrosion that causes much devastating destruction to structural members such as stainless steel in H2SO4 environments. The corrosion activity was studied using weight loss studies. The current study investigates the effects of three types of oil-dispersed polymers on the abrasive sliding wear of stainless steel: low-density polyethylene (LDPE), high-density polyethylene (HDPE), and polysulphide rubber (PSR). The external voltage enhances both the friction coefficient and the wear scar diameter, with PSR having a smaller scar diameter than both LDPE and HDPE. For all applied polymers, negative applied voltage has a smaller scar diameter than positive applied voltage. HDPE has the highest wear rate trends, followed by LDPE and PSR, in that order. The metallographic study revealed that when the H2SO4 solution interacts with the surface of the specimen, it causes pitting corrosion, weakens it, damages it, and changes its roughness over time.

Author (s) Details

S. A. Al-Ghamdi
Department of Electrical Engineering, Faculty of Engineering, Albaha University, Kingdom Saudi Arabia.

H. Abo-Dief
The Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt and The Chemistry Department, Faculty of Science, Al-Taif University, Kingdom of Saudi Arabia.

A. T. Mohamed
Mechanical Engineering Department, Albaha Faculty of Engineering, Albaha, Kingdom of Saudi Arabia.

View Book : https://stm.bookpi.org/AAER-V11/article/view/1242

Tribological Characteristics of Metallic Counterparts under Ultrasonic Elliptical Vibration | Chapter 3 | New Ideas Concerning Science and Technology Vol. 2

 Wear behaviour is important for enhancing the friction drive and wear lifetime of actuators or motors that operate with elliptical ultrasonic vibration. In particular, efficient friction-drive and long-lasting wear-life are critical for ultrasonic motor service efficiency, particularly for standing-wave ultrasonic motors, where the drive tip on the slider is in intermittent contact, followed by impact effects. A laboratory rig of ultrasonic vibration performs sliding wear tests of metallic friction pairs to investigate wear mechanisms of metallic driving and driven components. Using surface roughness, Abbott curves and fractal proportions, the surfaces of the various metallic sliders are characterised. Results show that, due to ultrasonic polishing and/or micro-rolling effect, surface roughness is reduced to varying degrees in the metallic sliders. Variations in the fractal dimensions of contact surfaces correspond to the roughness of the surface. Wear traces show that the key failure modes are plastic deformation and cracking. Ripples of 3~5 μm traces indicate the presence of fretting in duralumin sliders when the driving tip on the slider is in sporadic touch accompanied by impact results. During the operation of the ultrasonic motor, nodular cast iron demonstrated a favourable efficiency, showing a stable output performance and robust wear life.

Author(s) Details

Yanhu Zhang
Institute of Advanced Manufacturing and Modern Equipment Technology, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, P.R. China.

Jianjun Qu
School of Mechatronics Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, P. R. China.

Hongxiang Wang
School of Mechatronics Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, P. R. China.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/320