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Development of Ti-6Al-4V alloy coatings produced by cold spray technology
Ballayová, Kristýna ; Štěpánek, Roman (referee) ; Řehořek, Lukáš (advisor)
The cold spray method is receiving more and more attention both in research and development and in the industrial sector due to its undeniable advantages over conventional methods. However, the suitability of its application depends on the desired properties of the coating and the nature of the materials used. This work provides insight into cold spray in general and in the context of the spray material used – Ti-6Al-4V. The response to several sets of hot isostatic pressing (HIP) parameters was studied, with attention paid not only to the coating but also to the Al 2618 aluminium alloy substrate. The choice of hot isostatic pressing parameters, especially temperature, was a compromise solution with respect to the temperature resistance of the substrate material and the common values of this process in the processing of the spray material. The results of the practical analyses show that despite the efforts to find HIP parameters satisfying both constraints, the most essential properties of the coating were not improved. On the contrary, the HIP process led to a certain deterioration of the properties of the aluminium alloy substrate. These findings provide information for future process optimization and highlight the need for further research into the combination of these materials and technologies.
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Titanium, Alloys and Intermetallics for Biological and Industrial Applications
Vespalec, Vítězslav ; Jech, David (referee) ; Čelko, Ladislav (advisor)
The creation of this Bachelor´s thesis was performed as a search retrieval, which includes basic information about titanium and its alloys. In the first chapter is stated history of titanium manufacturing. Following chapter include the most important property of pure titanium, such as alotropic modifications of the crystal grid, chemical, physical and technological characteristics, there is also space, that is assigned for using contemporary division of titanium alloys, detrimental effect of impurity, shape memory effect and intermetallics instance. Third part concern about selected application in industry. The conclusion pursue about biocompatibility factor and possibility use titanium and its alloys in implantology and dental applications.
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CNC pocket milling of aeronautical alloys
Wiecková, Kateřina ; Sedlák, Josef (referee) ; Ohnišťová, Petra (advisor)
The aim of the work is to generate and verify pocket milling technology in aviation alloy 7475-T7351 with respect to machine time, surface and machining productivity. First part of the work is theoretical analysis of cycles of milling of simple and complex pockets. Next part of the work is focused on the desing and optimization of strategy of milling of simple and complex pockets in CAM programs and its experimental verification.
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Machining of titanium alloys
Horáček, David ; Mouralová, Kateřina (referee) ; Píška, Miroslav (advisor)
This thesis is focused on titanium and its alloys, in terms of properties and uses. The problems of machinability, cutting tools, quality of machined surfaces and machining method are discussed. Threads in titanium alloys Ti-6AI-4V were cut in the practical part. The intention was to compare torque moments and surface quality of threads by using two cutting oils.
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Machining of titanium alloys
Müller, Peter ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
The bachelor thesis specifies the most important properties and production processes of titanium, categorizes titanium alloys and their properties. In the experimental part, titanium alloy Ti-6Al-4V blank was machined and cutting forces were measured, depending on selected feeds per revolution. Subsequently specific cutting force was calculated and compared with values given by the tool manufacturers.
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Titanium and its alloys in aviation
Černota, Jan ; Adam, Ondřej (referee) ; Němec, Karel (advisor)
This bachelor thesis deals with the issue of the use of titanium and its alloys in aviation. First, it deals with titanium as a light metal, its history, occurrence, use, manufacture, and properties. Then about its alloys, their division, and the characteristics of individual alloys, considering their utility for aerospace applications. The main part deals with the use of titanium and its alloys in the aerospace industry, where the performance requirements of materials used in aviation are summarised, how titanium meets these properties and for which components titanium is most often used. The thesis also predicts the development of the use of these materials in the aerospace industry.
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Structure and properties of welded joint TiAl6V4 / 6061 made by electron beam technology
Král, Michael ; Jan, Vít (referee) ; Foret, Rudolf (advisor)
Titanium and aluminium alloys are among the most used construct materials due to their physical and mechanical properties except steels. The joining of these alloys can improve properties of whole construction but it is still difficult task. Especially welding of titanium and aluminium alloys is difficult cause formation of undesirable intermetalic phases in the weld. This thesis focuses on influences of electron beam welding parameters especially focusing and deflection of beam and preheating of base material to quality of heterogeneous join of titanium alloy Ti6Al4V and aluminium alloy EN AW-6061 – T651. There is described preparation of welded joins and brazed joins in the thesis, which are evaluated by light microscopy, scanning electron microscopy and EDS analysis of chemical composition. There was evaluated presence and chemical composition of formated intermetalic phases in the welded joins and quality and defects in the brazed joins.
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The Material Selection for Bicycle Frames
Šály, Peter ; Petrenec, Martin (referee) ; Němec, Karel (advisor)
Bachelor's thesis summarises basic information about materials that are used for production of bicykle's frames. It concerns not only with common materials that are the most used nowadays, thus aluminium alloys and composite materials – carbon in the concrete, but it also pointed on the other, alternative materials. It also explains specific terms that relate to concrete materials or to their technological treating. Each material has listed characteristic which is objective thus measurable and it results from physical-chemical's properties and treating possibilities of concrete materials. It conveys assumption of frame behaviour made from this material. Subjective characteristic is also listed and it results from practice – from the feelings by real ride. Comparison of these two approaches resulted in conclusion which may help in choosing material for bicykle's frame which we have specific requirements on. Next thesis concerns with usage of concrete materials by various producers whether world producers or national ones, with orientation on brands which are interesting because of their treating of unusual materials or they are interesting because of their specific treating of common materials. There is a brief review of most used materials for concrete types of bicycle's frames at the end of the thesis.
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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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