Slobodan Mitrovic

Slobodan Mitrovic
University of Kragujevac · Faculty of Engineering

Full Professor

About

99
Publications
29,302
Reads
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1,560
Citations
Additional affiliations
February 2017 - present
University of Kragujevac
Position
  • Professor (Full)
June 2012 - January 2017
University of Kragujevac
Position
  • Professor
October 2007 - present
University of Kragujevac
Position
  • Professor (Assistant)

Publications

Publications (99)
Presentation
Full-text available
Today, natural fibers and their composites are increasingly present in the industrial production of various materials, ranging from the textile industry, through construction, all the way to the automotive and aerospace industry. Their wide application is justified by the replacement capabilities of composite materials reinforced with synthetic fib...
Article
Dynamic friction coefficient (COF) of the reciprocating sliding contact of the conventional UHMWPE, was investigated in four different environments (dry contact; distilled water; pure Ringer’s solution and with PMMA particles), at five values of low normal load (0.1–1 N) and three values of sliding speed (4 - 12 mm/s). Significant differences of CO...
Article
Full-text available
Applying new technologies to reduce friction and wear in vehicles and equipment can minimize mechanical losses. This reduces power loss in internal combustion engines and reduces fuel consumption and emissions. Consumption of fuel energy can be reduced by the use of light metals, for example aluminum alloy, to produce vehicles and their aggregates...
Article
We used Fused Deposition Modeling (FDM) for 3D printing of Polylactic acid (PLA) samples, with variation of the printing infill (20% and 100%). Tribological testing was performed on a nanotribometer, under low loads (5, 10, and 15 mN), with a rotating module (ball-on-flat). We studied the friction and wear of PLA samples in two different positions:...
Article
Full-text available
This paper presents microstructural properties and damage behaviour of a vacuum mixed poly(methyl metacrylate) (PMMA) bone cement, during the sliding contact with AISI 316L stainless steel, under micro-loads. Influence of the Ringer's solution on the wear was analysed in comparison to dry contact. The variation of load did not produce any significa...
Article
This paper presents an experimental test of the contact wear between STRENX 700 material and autofretched steel, which is obtained in practice by the autofretching (material reinforcement) of artillery pipes. Three types of lubricants were varied during the test: HD 46 oil, Hysol T15 emulsion, and For 3 grease. Also, the experiment was performed by...
Article
Full-text available
The paper describes the wear performance of zinc-aluminium ZA27 alloy, reinforced with silicon-carbide (SiC) and graphite (Gr) particles. The compo-casting technique produced the composite samples. The tested samples were: ZA27 alloy, ZA27/5%SiC composite, and ZA27/5%SiC/3%Gr hybrid composite. A block-on-disc tribometer was used during wear tests u...
Conference Paper
Full-text available
Transport is largely dependent on oil because the majority of transport vehicles are propelled by engines combusting petroleum products-hydrocarbon fuels. This particularly relates to road, air and water transport. Power losses in the internal combustion engines and other reciprocating machines are mainly engaged to overcome friction. If using alum...
Conference Paper
Full-text available
Tribological behaviour of composite with the ZA-27 alloy base reinforced by 5% SiC is considered in this paper. The optimization of tribological behaviour was conducted using the Taguchi method. Composite was prepared by the compocasting procedure. Tribological experiments were carried out using a block on disc tribometer with the variation of thre...
Conference Paper
Full-text available
The achievement of the required roughness of the surface (today known as surface texture) is of great importance in obtaining the required characteristics of the parts from the aspect of reduction of friction and wear. The most common methods for obtaining the required roughness, or surface textrure, are laser treatment and micro-processing by mill...
Article
Full-text available
This paper describes the nanomechanical characteristics of Zirconium (IPS e.max ZirCAD, Ivoclar Vivadent) treated with three different surface finishing techniques: polishing, glazing and grinding, using the Anton Paar nanoindentation. The hardness (HV) and Elastic modulus (E) of the surface structure were presented as results of nanoindentation me...
Article
Full-text available
Aluminum gained in importance as a material for lightweight design of reciprocating engines and compressors. The application of aluminum alloys contributes to lower fuel consumption and exhaust emissions. The benefit of using aluminum is evident due to the reduced weight of the parts, but in parallel there is a problem due to the lower strength of...
Article
Full-text available
Tribological behaviour of composite with the ZA-27 alloy base reinforced by 5% SiC is considered in this paper. The optimization of tribological behaviour was conducted using the Taguchi method. Composite was prepared by the compocasting procedure. Tribological experiments were carried out using a block on disc tribometer with the variation of thre...
Article
Full-text available
A tribological system is a complex non-linear system composed of the elements that are connected structurally and functionally. The aim of this paper is to present an overview of artificial neural networks, its development and applications of neural networks in the prediction of tribological properties of dental glass ceramic using a newly measured...
Conference Paper
Full-text available
For reciprocating machines are applicable different materials for the piston skirt and piston rings as well as for cylinder liner. The friction and wear of the piston group is highly dependent by the material and the honing of cylinder liner, the coating characteristics, the piston ring dimensioning and tension. If using aluminum alloys for produci...
Chapter
This review provides an insight into the level of knowledge about the properties of silver nanoparticles, their already existing applications and possible further developments, as well as their effects on different behaviour and properties of the products wherein they are used. This chapter reviews the application fields of nanosilver, starting fro...
Chapter
This review presents the state-of-the-art in the development of iron-based degradable medical implants. Basic properties demanded by the new concept of degradable implants are elaborated, along with the work devoted to understand the underlying mechanism and to improve the properties towards best fitted to the natural tissue. Three application area...
Article
Full-text available
The Compacted Graphite Iron (CGI) represents an example of material with remarkable and unexplored properties, especially in terms of resistance and machinability. With better strength and stiffness than several cast irons, as Grey Iron, and better castability, machinability and thermal conductivity than others, as Ductile Irons, this alloy would b...
Conference Paper
Full-text available
Aluminum gained in importance as a material for lightweight design of reciprocating engines and compressors. The application of aluminum alloys contributes to lower fuel consumption and exhaust emissions. The benefit of using aluminum is evident due to the reduced weight of the parts, but in parallel there is a problem due to the lower strength of...
Article
A vibroplatform model has been presented, which is used in industry for the separation and transportation of granular materials. An analysis of the results of theoretical and experimental studies of the coefficient of friction between the screen and sand granules has been carried out in real operating conditions of the vibroplatform.
Article
The paper presents short review of different aspects of the introduction of porosity into the bulk biomaterial and effects on different material characteristics, especially related to friction and adhesion. Nowadays, there is a great interest to investigate relations between porosity, different mechanical responses due to controlled topography and...
Article
Full-text available
A lot of literature is devoted to the identification of wear particles obtained in order to monitor the status of technical systems and the analysis of wear. The biggest influence on the process of wear have solid particles having a size equal to the size of the gap, but have little impact particles whose size is three times smaller than the size o...
Article
Full-text available
In information technologies, in the last few years, the changes are numerous and dynamic, and one of those changes is the massive use of mobile devices. They are not only used for communication, but also for access to applications and data in databases. Interactive processing of data from social networks, which is a priority for the mobile device,...
Article
Full-text available
Purpose The purpose of this study is to show which filler metal is the best for hard facing. Because the quality of the surface layer has a great influence on the working life of parts, the purpose was to extend the working life of parts exposed to intensive wear. The tested hard-faced models were made of low carbon steel to save the expensive base...
Article
Full-text available
Friction stir processing has extensive application in many technological operations. Application area of friction stir processing can be extended to the processing of non-metallic materials, such as wood. The paper examines the friction stir processing contact between a specially designed hard and temperature-resistant rotating tool and workpiece w...
Article
Full-text available
The aim of this study is presenting AFM analysis of surface roughness of Lithium disilicate glass ceramic (IPS e.max CAD) under different finishing procedure (techniques): polishing, glazing and grinding. Lithium disilicate glass ceramics is all-ceramic dental system which is characterized by high aesthetic quality and it can be freely said that pr...
Article
Full-text available
Nanoindentation has been widely used for material mechanical characterization. In this study, nanocompozite of ZA-27 alloy matrix reinforced with different volume fractions of nanometric Al2O3 ceramic particles ranging from 0 to 5 %, were produces using compocasting technique. Nanoindentation tests were performed using Berkovich three sided diamond...
Article
Cubic SiC nano-powder particles were synthesized by a sol-gel process with an average grains size of 9.5 nm which were subsequently densified by using a high-pressure "anvil-type with hollows" apparatus at a pressure of 4 GPa in order to obtain nanostructured bulk ceramic compacts. The density obtained was >98% at a sintering temperature of 1500°C...
Conference Paper
Full-text available
Hardness, microstructure and wear resistance of hard faced models executed by application of four different kinds of filler metals are analyzed in this paper. The objective of this work is to show which filler metal is the best for hard facing, from the aspect of laboratory checking of the wear resistance. Models, that were hard faced, were made of...
Conference Paper
Full-text available
The corrosion behavior of particulate ZA27/SiCp composites in an aerated sodium chloride solution was studied. The composites were synthesized via compocasting with addition of 1, 3 and 5 wt. % SiC particles in the matrix alloy. Composite samples were immersed for 30 days in the 3.5 wt. % NaCl solution open to the atmospheric air. Surface appearanc...
Article
Full-text available
The paper presents tribological behaviour of hybrid aluminium composite A356/10SiC/3Gr in dry-sliding conditions. Hybrid composites were made with a modified compocasting procedure and tribological tests were conducted on a tribometer with a block-on-disc contact geometry. An analysis of the effects of three sliding speeds ((0.25, 0.5 and 1) m/s) a...
Article
Hybrid A356/SiCp/Grp composites were produced via compo-casting using the A356 aluminum alloy as the composite matrix, with silicon carbide microparticles (SiCp) and graphite macroparticles (Grp) as reinforcements. The effect of the thixocasting process on the microstructure of a modified A356 alloy (with 0.03 mass% of strontium) was considered. Th...
Article
Full-text available
The paper presents the wear characteristics of a hybrid composite based on zincaluminium ZA27 alloy, reinforced with silicon-carbide and graphite particles. The tested sample contains 5 vol.% of SiC and 3 vol.% Gr particles. Compocasting technique has been used to prepare the samples. The experiments were performed on a "block-on-disc" tribometer u...
Article
Full-text available
Tribological behavior of two alloyed steels subjected to shot peening was investigated, under dry and lubricated sliding. 36CrNiMo4 and 36NiCrMo16 alloy steels were investigated at block-on-disc sliding testing machine, and three different applied loads (10 N, 30 N, 50 N) and sliding speeds (0.25 m/s, 0.5 m/s, 1 m/s) were observed. Shot peened surf...
Article
Relevant and timely information is of crucial importance in scientific investigations and understanding of the phenomena should be precise and explicit. Among others, phases of scientific investigations comprise data acquisition and their structuring into database and data warehouse, followed by their analysis in order to find laws and patterns and...
Article
Full-text available
Thixocast ZA27 alloy and particulate ZA27/SiCp composites were subjected to artificial aging at 80, 120 and 160 degrees C (T5 regime). Composites with 5 and 10 vol.% SiC particles were produced via the compocasting method. The influence of the aging was investigated using different techniques. Differential scanning calorimetry was performed to reve...
Article
Full-text available
This paper presents basic tribological properties of A356/10SiC/1Gr hybrid composites in conditions with lubrication. Hybrid composite specimen is obtained by compocasting procedure. A356 aluminium alloy is used as a base matrix alloy, reinforced with 10wt% of SiC and 1wt% of graphite. Tribological tests are done on advanced and computer supported...
Conference Paper
Full-text available
The influence of corrosion on the microstructure of ZA27/SiCp composites was examined. The composites were produced by compo casting technique and then subjected to the thermal treatment (T4 regime). Microstructural examinations were performed after 30-day exposure of thermally treated composites in the sodium-chloride solution. Corrosion processes...
Conference Paper
Full-text available
ZA27 legura sa nedendritnom strukturom dobijena je tiksokasting postupkom. Čestični kompoziti sa osnovom od navedene legure dobijeni su kompokasting postupkom, odnosno infiltracijom 5 vol. % i 10 vol. % SiC čestica u poluočvrsli rastop legure. Uzorci tiksolivene ZA27 legure i kompozita bili su podvrgnuti procesu starenja na 80, 120 i 160 °C (T5 rež...
Conference Paper
Full-text available
This paper deals with the friction coefficient behaviour during dry reciprocating sliding of UHMWPE in contact with alumina (Al2O3), within a range of velocities typical for hip implants. Five values of normal force (100-1000 mN) and three values of sliding speed (4-12 mm/s) have been observed. Real time diagrams of the friction coefficient as a fu...
Data
Full-text available
This paper presents tribological characteristics of hybrid composites with aluminium matrix, reinforced with silicon carbide (SiC) and graphite (Gr). Newly formed Al/SiC/Gr hybrid composites are the combination of the two different hybrid materials. Namely, hard particles of silicon carbide increase the hardness and resistance to wear, while soft p...
Article
Full-text available
This paper presents tribological characteristics of hybrid composites with aluminium matrix, reinforced with silicon carbide (SiC) and graphite (Gr). Newly formed Al/SiC/Gr hybrid composites are the combination of the two different hybrid materials. Namely, hard particles of silicon carbide increase the hardness and resistance to wear, while soft p...
Article
Corrosion assisted wear behavior of orthopedic AISI 316LVM stainless steel is explored by using tribological tests and SEM/EDS analysis. Wear mechanisms were investigated in three different environments, under reciprocating sliding at micro-loads. Variation of the sliding speed was also observed. Samples were subjected to the dry sliding, sliding i...
Article
Full-text available
Cr hard coatings are largely used in industry in metal cutting and cold forming processes; This work on quantitative way represents improvement, in terms of wear resistance, which is obtained by depositing Cr hard coating on foundation material. Wear testing is done on tribometer with block –on –disc contact geometry at sliding contact of Cr hard c...
Article
Deformation behavior of polymethyl methacrylate (PMMA) bone cement is explored using microindentation. Two types of PMMA bone cement were prepared. Vacuum treated samples were subjected to the degassing of the material under vacuum of 270 mbar for 35 s, followed by the second degassing under vacuum of 255 mbar for 35 s. Air-cured samples were left...
Article
Full-text available
The paper reviews contemporary research in the area of hybrid composites based on zinc and aluminium alloys reinforced with SiC and graphite particles. Metal matrix composites (MMCs) based on ZA matrix are being increasingly applied as light-weight and wear resistant materials. Aluminium matrix composites with multiple reinforcements (hybrid AMCs)...
Article
Full-text available
The lubricated and dry sliding wear behaviour of Za-27 alloy composites rein-forced with al 2 o 3 particles of size 250 µm was evaluated. the content of al 2 o 3 particles in the alloy was 3, 5 and 10 wt.%. composites were produced by the compocasting process using mechanical mixing of the matrix, i.e. al 2 o 3 particles as reinforcement were added...
Article
Full-text available
Shot peening processing is used to increase static and dynamic strength of the working part. not just a change of surface layers characteristics but also a change of tribological characteristics can be obtained by using this method. results of laboratory investigations presented and analysed in this paper are related to effects of final machining b...
Article
Full-text available
The influence of surface roughness on the coating adhesion of electrodeposited chrome coatings with different roughnesses, has been evaluated using scratch testing technique. Coatings were deposited on the high alloyed tool steel. Photographs of the scratch grooves were recorded by the built-in optical microscope, at moments when critical loads had...
Article
Full-text available
Tribological behaviour of TiN coating deposited on high alloyed tool steel during scratch testing and linear reciprocating testing, at micro Newton loads in dry contact conditions, was investigated in this study. Influence of coating surface roughness on friction coefficient and wear life of TiN coating was studied. The results showed that TiN coat...
Article
Full-text available
Characterization of polymethyl methacrylate (PMMA) based bone cement subjected to cyclical loading using microindentation technique is presented in this paper. Indentation technique represents flexible mechanical testing due to its simplicity, minimal specimen preparation and short time needed for tests. The mechanical response of bone cement sampl...
Article
The present investigation deals with the effect of Al2O3 particle reinforcement on the lubricated sliding behavior of ZA-27 alloy. The composites with 3, 5, and 10wt% of Al2O3 particles were produced by the compocasting procedure. Tribological properties of alloy and composites were studied, using block-on-disk tribometer at different specific load...