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Structure and fatigue properties of selected titanium alloy
Prudíková, Alena ; Kohout, Jan (referee) ; Věchet, Stanislav (advisor)
Main topic of the thesis was to evaluate fatigue properties of the titanium alloy Ti-A13-V2,5, labelled by ASTM as Grade 9. Most attention was focused on fatigue behaviour of the alloy in the range of high cycle fatigue. Fatigue testing was realised to detect the fatigue properties and consequently to generate the Wöhler curve and the Haigh diagram. In addition to this, tension and bending tests were performed. Metallographic and fractographic analyses of fatigue fracture form part of the overview about material properties, which was accomplished by use of REM. Experimental part of the thesis was backed by the literature research. The first half of it contains a short summary of basic information about the titanium and its alloys, so as some chapters about the history and properties of titanium, the way of its production, classification of titanium alloys and its thermic treatment. The fatigue is thoroughly scrutinised in the second half of the background research. Here can also be found the information about the fatigue process, its stages, the fatigue life and the most significant attributes of the fatigue fracture. The last chapters of the thesis are dedicated to the alloy Ti-A13-V2,5 - being examined in the experimental part - so as to its fatigue properties. The main benefit of this thesis is the completion of the missing information concerning the fatigue behaviour of the alloy, which is – according to the literature research - generally not available.
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Tool life of ADMX inserts for milling of the S-grade materials
Tejkl, Jakub ; Kouřil, Miroslav (referee) ; Píška, Miroslav (advisor)
This diploma thesis studies the machining of group S materials. In the theoretical part of this thesis these materials were divided into groups and subsequently analyzed. These materials were also analyzed in terms of their impaired machinability. In the practical part of this thesis experimental tests were conducted to determine tool life, tool wear and in the case of testing titanium alloy surface roughness too.
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High cycle fatigue of Ti6Al4V titanium alloy
Bártková, Denisa ; Liškutín, Petr (referee) ; Věchet, Stanislav (advisor)
The main goal of this master's thesis is an analysis of high-cycle fatigue of titanium alloy Ti- 6Al- 4V. In the first section of a theoretical part of the thesis, there are summarized current facts about production, properties and aplications of titanium alloys. The second section pursues fatigue behaviour of material. An experimental part consists of metallographic analysis, evaluation of tension and bending tests and mainly analysis of high-cycle fatigue behavior for different assymetry ratios.
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Problems in machining of titanium alloys
Drábek, Tomáš ; Slaný, Martin (referee) ; Sedlák, Josef (advisor)
The theoretical part of the thesis contains a brief overview of some experimental methods that are used in machining technologies. The experimental part at first elaborates on the analysis of two titanium alloys. The actual experiment, which consists of milling of the two aforementioned materials with the use of several tools and holders, is then described. It was conducted in collaboration with the company Frentech Aerospace s.r.o. When milling, forces were measured with piezoelectric dynamometer. Further, the analysis of acquired data that is followed with discussion about its main findings, is provided. The conclusion of the thesis deals with the found facts corresponding with the information obtained by analysis of materials. The main results arise out of the comparison of used combinations of tools and holders for milling of material Ti-Al6-V4, observation of impact of particular factors on measured force, or out of different values of measured forces when milling two given materials.
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Analysis of material to be machined influence on the wear and tool durability
Tolkner, Josef ; Novák, Zdeněk (referee) ; Bumbálek, Bohumil (advisor)
Machining technology is a multi disciplinary field, and together with the economy are playing always more important role in the success of the enterprise market products and services. Recent studies show that it requires very close link between technology, management and information technology such as the integration process and production planning, simulation of manufacturing systems, production flexibility, virtual machines, control algorithms, etc. The key changes are based on the requirements for miniaturization of products, higher production accuracy, closer tolerances, better surface quality, part of weight reduction, reduction of lot size and reducing production costs. The report is focused on machining titanium alloys. In the theoretical part are presented the properties and the distribution of titanium alloys. In the practical part is then carried out an experiment aimed to influence the composition of workpiece material on tool wear. Experiment results and recommendations are listed at the end of this report.
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Machining of Titanium Alloys
Karásek, Jan ; Slaný, Martin (referee) ; Píška, Miroslav (advisor)
The main goal of this work is the analysis of manufacturing costs for the component of wheel´s blower. Followed by setting up the size of specific cutting force for milling operation of the titanium alloy Ti-Al6-Mo2-Cr2-Fe-Si, the used tool was a milling cutter which is made out of sintered carbide with conical and spherical face. The final values which are at intervals of 1500 to 1800 MPa were compared with the values of the Sandvik Coromant firm kc = 1690 MPa, for titanium alloy with the strenght in tension Rm = 1050 MPa.
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Biocompatible titanium alloys and theirs application
Hofírek, Michal ; Kohout, Jan (referee) ; Věchet, Stanislav (advisor)
This thesis presents use of titanium alloys in medical applications in form of literature research. In first part the basic properties of titanium as element are discussed as well as its behavior in alloys. Next part focuses on proper explanation of term biocompatibility and sums up specific requirements for alloys used in orthopaedic applications. These properties are shown on alloy Ti-6Al-4V ELI and other selected titanium based alloys which are currently being developed.
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Fatigue properties of titanium alloys
Horník, Vít ; Němec, Karel (referee) ; Věchet, Stanislav (advisor)
This bachelor thesis is concerned with fatigue properties of titanium alloys. The introductory part deals with basic information about titanium, its production, distribution of titanium alloys and their heat-treating. Next part then describes basic process of fatigue loading with the focus on the high-cycle fatigue stress and its application on some titanium alloys. The final part of the thesis includes optical and fractograph pictures.
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Machining of hard-to-machine materials
Tejkl, Jakub ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
This bachelor thesis studies the machining of hard-to-machine materials. The first part of the thesis considers hard-to-machine materials and analyses them. The next part of the study focuses on individual alloy machinability issues. The final section of the thesis is devoted to experiment, statistical analysis and subsequently to its evaluation.
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