Manufacturing Technology Journal, 2022 (vol. 22), issue 5
A Modified Thermal Model of Internal Grinding
Zhou Chang, Lai Hu
Manufacturing Technology 2022, 22(5):511-518 | DOI: 10.21062/mft.2022.064 
In the present study, an innovative method is proposed to improve the accuracy of thermal models of the grinding process. To this end, a set of orthogonal experiments are carried out to calculate heat flux using infrared temperature measurements. Then the convective heat transfer coefficient is modified based on the heat transfer and hydrodynamics theories. Finally, the modified heat flux and convective heat transfer coefficient are applied and a thermal model is established using ANSYS software. To verify the accuracy of the proposed model, a finite element grinding residual stress model based on the grinding heat and grinding force is established....
Study on Ti2AlC/Mg Matrix Composites with Dual-scale Three-dimensional Network
Yujia Chen, Lai Hu
Manufacturing Technology 2022, 22(5):519-529 | DOI: 10.21062/mft.2022.065
The development of metal structural materials with low density, high specific strength and large internal friction is extremely urgent for the development of lightweight, high speed and high power of equipment and railway. The properties, microstructure and the evolution of interfacial bonding of composite materials are closely related. In this paper, the microstructure of Ti2AlC/Mg matrix composites with double-scale three-dimensional network is mainly studied. The prepared composite material presents a three-dimensional network in macro-micro scale, and the matrix and reinforcement are connected with each other. The mechanical properties and damping...
The Diffusion Coatings for Industrial Tool Application
Marcin Drajewicz, Adrianna Przybylo, Jakub Jopek, Marek Góral, Barbara Koscielniak, Kamil Ochal, Tadeusz Kubaszek, Artur Gurak, Kamil Dychton, Mateusz Wozniak, Pawel Kwasniewski, Artur Kawecki, Wojciech Gluchowski, Marek Lagoda
Manufacturing Technology 2022, 22(5):530-541 | DOI: 10.21062/mft.2022.066
The diffusion boriding process allows to increase the abrasion and corrosion resistance of the majority of steel grades. The aim of this study was to determine the influence of the chemical composition of the substrate of various steel grades on the microstructure of boride coatings produced using two diffusion methods: pack cementation boriding using EKABOR-2 and paste-pack boriding using EKABOR-PASTE on the substrate of tool and structural steels:. The boriding processes were carried out at 1000oC in an argon atmosphere for 4h. Scanning microstructure investigations of the obtained coatings indicate that a high content of alloying elements increasing...
Study of Light Transmission and Noise Attenuation Properties of Light Active Glass Materials
Pavel Hrbáček, Martin Vašina
Manufacturing Technology 2022, 22(5):542-549 | DOI: 10.21062/mft.2022.062
Lighting and noise belong to important environmental factors that have an influence on human psyche, concentration, labour protection, sleep quality and so on. This paper is focused on study of light transmission and noise attenuation properties of light active glass materials, which are applied as window and door panels in residential buildings. The light transmission through tested materials was evaluated by means of the transmission coefficient from the illuminance ratio method. The material ability to dampen noise was determined based on the sound pressure level attenuation during sound propagation through the light active glass materials. Different...
Superalloys – Characterization, Usage and Recycling
Alexandra Kollová, Katarína Pauerová
Manufacturing Technology 2022, 22(5):550-557 | DOI: 10.21062/mft.2022.070
Superalloys are a group of alloys developed for use during long-term heat exposure above 650 °C. Properties and applications of superalloys are described in the present work. The work includes statis-tics about superalloys demand, market value and the current price. Division of superalloys according to basic element is mentioned. Nickel-based superalloys are further divided into two groups accord-ing to their use. Afterwards, the paper is focused mainly on nickel-based superalloys. Examples of nickel-based superalloys are listed in the work. Recycling possibilities of nickel-based superalloys are stated and analysed. General scheme of processing nickel-based...
Analysis and Prediction of Roughness of Face Milled Surfaces using CAD Model
János Kundrák, Csaba Felhő, Antal Nagy
Manufacturing Technology 2022, 22(5):558-572 | DOI: 10.21062/mft.2022.061
The condition for the designability and efficiency of the machining processes is that the part production process is chosen to meet the operational requirements based on the most accurate technological plans possible. One part of this is the planning of the required quality and roughness of the surfaces and achievement of the required values in the finishing. In this paper, a study on the predictability of surface roughness was performed using a CAD model based on theoretical roughness and validated by cutting experiments. The reported results show the effect of the feed rate change in face milling for two tools with different edge geometries in planes...
Glass Containing Eu2O3, Tb2O3, Sm2O3, ZnO as a Color Filter Used in the Automotive Industry
Aleš Mareška, Tereza Kordová, Martin Havlík Míka
Manufacturing Technology 2022, 22(5):573-584 | DOI: 10.21062/mft.2022.071
Over the next few years, LEDs are likely to be responsible for all of the vehicle's exterior lighting func-tions. Everything is focused on maximum security. For this reason, there are more and more automatic color detection systems in the car. Proper color separation is the key to optimal operation and proper evaluation of these automatic systems. An example is the correct detection of traffic light colors. The automotive industry is dependent on consistency and predictability. Classification is an important func-tion for automated control and requires the correct color resolution of the signals captured by the camer-as. We propose to use glass containing...
Rapid Determination of Changes in Material Properties of Water Turbines Blades
Maxim Puchnin, Františka Pešlová, Jiří Kuchař, Viktor Krejbich
Manufacturing Technology 2022, 22(5):585-589 | DOI: 10.21062/mft.2022.075
The changes in the material properties of water turbine blades are characterized an undesirable process, which could lead to the end of usable life or to the emergency conditions of this turbine. For this reason, it is important to determine of any material quality changes and continuously monitor them. Considering that, these essential parameters are showing the ability of material to resist the operational stress. It is necessary to choose rapid methods of the material testing which are without preparation of the samples (it is inadmissible to the functional blades) able to immediately monitor the state of the materials by non-destructive methods....
Characteristics of Pinewood Dust Combined with Vinyl Ester Composites Through Material Testing and Machining
Muhammad Wafiuddin Suhami, Norfariza Ab Wahab, H. Boejang, Khairum Hamzah, Hiroyuki Sasahara
Manufacturing Technology 2022, 22(5):590-597 | DOI: 10.21062/mft.2022.063
Natural fibre-reinforced polymer (NFRP) composites can be environmentally friendly and cost-effective alter-natives to synthetic fibre-reinforced composites. Major industries have expressed significant interest in the advancement of new natural fibre-reinforced composite materials. However, these materials perform poorly on their own and require further analysis since accessible information is lacking in the literature. This paper presents the results of previously reported works on natural fibre reinforced polymer composites, with strong attention to the types of fibres employed, the polymers used in the matrix, the treatment of fibres as well as...
The Influence of Fe Content on Corrosion Resistance of secondary AlSi7Mg0.3 Cast Alloy with Increased Fe-content
Zuzana Šurdová, Lenka Kuchariková, Eva Tillová, Lucia Pastierovičová, Mária Chalupová, Milan Uhríčik, Martin Mikolajčík
Manufacturing Technology 2022, 22(5):598-604 | DOI: 10.21062/mft.2022.073
Production of primary aluminium is energetically enormously expensive. The use of secondary (recycled) aluminium, has therefore a high potential to save money and energy while reducing the negative environmental impact of aluminium production. Although the properties of secondary aluminium alloys are generally comparable to those of primary aluminium alloys, the increased Fe content can lead to a significant reduction in the corrosion resistance of these alloys. Secondary (recycled) AlSi7Mg0.3 cast alloy with different iron contents (0.123, 0.454, 0.679 and 1.209 wt. %) in the as-cast and after heat treatment (T6) condition was investigated. The quantitative...
Microstructure and Phase Composition of Thin Protective Layers of Titanium Aluminides Prepared by Self-propagating High-temperature Synthesis (SHS) for Ti-6Al-4V Alloy
Anna Teichmanova, Alena Michalcova, David Necas
Manufacturing Technology 2022, 22(5):605-609 | DOI: 10.21062/mft.2022.069
Titanium aluminides were prepared using self-propagating high-temperature synthesis (SHS) from powder aluminium and compact Ti-6Al-4V alloy at 800 °C. The resulting material was subsequently annealed at the same temperature for 3 hours. The coating was successfully bonded to the matrix using SHS while forming intermetallic phases of cubic TiAl3 in areas of powdered aluminium. The resulting coating was approximately 14 μm thick. Material annealing resulted in further reactions between the TiAl3 coating and Ti-6Al-4V matrix, forming a thin layer of γ-TiAl. Using SEM, the different phase composition of annealed and unannealed material was clearly...
Ballistic Resistance of Composite Materials Tested by Taylor Anvil Test
Jindřich Viliš, Zdeněk Pokorný, Jan Zouhar, Miroslav Jopek
Manufacturing Technology 2022, 22(5):610-616 | DOI: 10.21062/mft.2022.074
This study is focused on testing the ballistic resistance of composite materials to define their limit thicknesses according to the US STANDARD NIJ 0101.06, level III. The materials Twaron CT 747, Twaron CT 747 TH110 and Endumax Shield XF33, which are widely used in the manufacture of the ballistic protection systems, were tested. A method known as the Taylor Anvil Test (TAT) was used to verify their ballistic resistance. The missile 7.62 mm M80 was used to test the ballistic resistance of these materials. Within the experimental part, the deformation processes of composite materials were examined after impact by this missile. The value of the traumatic...
The Effect of Casting Mold Material on Microstructure of Al-Si Alloys
Tomas Vlach, Jaromir Cais
Manufacturing Technology 2022, 22(5):617-623 | DOI: 10.21062/mft.2022.072
This article deals with the influence of the mold material on the segregation process in selected Al-Si alloys. Three types of Al-Si alloys were chosen in order to compare the segregation process while congealing. AlSi7Mg0.3, AlSi7Cu4 and AlSi10.5Cu1.2Mn0.8Ni1.2Pb0.5 alloys were cast by gravity casting in a metal and sand molds. Macroscopic and microscopic analysis of the internal structure of each of the alloys was also studied. The chemical composition within the lower, middle and upper parts of the casts were observe by using scanning electron microscope. All samples were subjected to the Vickers microhardness measurement of a solid solution of...
Research of the Quenched Crankshaft Fatigue Property Based on the Multi-physics Coupling Analysis and the Theory of Critical Distance
Chang Wu, Songsong Sun
Manufacturing Technology 2022, 22(5):624-632 | DOI: 10.21062/mft.2022.068
Nowadays the electromagnetic induction quenching approach has been widely applied in the surface treatment process, especially for the parts made by metal materials such as the crankshafts. In this paper, quantitative study was adopted in researching the strengthening effect of this technique. First the multi-physics simulation was achieved to carry out the key information caused by this approach such as the temperature and residual stress distribution property. Then the fatigue limit load prediction was conducted based on the simulation results and the theory of critical distance. Finally corresponding experimental verification was performed to check...
Perspectives of the Low Force Friction Welding Process
Paweł Żurawski
Manufacturing Technology 2022, 22(5):633-643 | DOI: 10.21062/mft.2022.067
The conventional solid-state friction welding process involves imparting a movement to one of them, bringing them closer together so that there is friction from the clamping force. By overcoming the frictional resistance on the surface of the workpieces, work converted into heat is generated. The obtained heat heats the elements to a temperature close to the melting point but not exceeding it. After stopping the movement in relation to each other, the process of pressing the elements with the force P with a greater force causes plasticization of the material and the formation of a flash. In low pressure friction welding, most of the heat required for...