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Strucure and mechnical properties of cold sprayed Ti-6Al-4V layer
Sabela, Jakub ; Zelený, Martin (referee) ; Řehořek, Lukáš (advisor)
Diploma thesis deals in the first part with recent knowledge of cold spray, its mechanism and parameters of deposition, advanced coatings made by cold spray and their applications, knowledge of Ti-6Al-4V coatings and their heat treatment. Deposit of Ti- 6Al-4V powder was made by cold spray process. In experimental part, microstructure and mechanical properties of supplied and its heat treated material were observed and examined. Mechanical properties and microstructure remained unchanged by annealing at 600 °C as in the case of supplied material. Recrystallization occured in microstructure of and phases by annealing at 800 °C. Grains were emerged in microstructure and mechanical properties were decreased. Mechanical properties were improved by annealing at 900 °C due to quenching. Microstructure consists of and ’ phases. Mechanical properties were the worst for annealed material at 1000 °C because of coarsed grains. Material which was annealed at 800 °C, quenched and precipitation hardened had the best microstructure and mechanical properties.
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Shape memory alloy
Sabela, Jakub ; Doležal, Pavel (referee) ; Němec, Karel (advisor)
The main aim is an overview of process in a shape memory metal-based materials. In the first part of the thesis, I commented on the issue of history and principle of shape memory materials. In the second part I have divided this materials by a structural point of view, dealing with the most widely used memory material in practice. I pointed out its advantages and disadvantages. Another part was devoted to the production, thermal and mechanical processing. Then I said the most used application in practice. Finally, I commented on the future shape memory materials.
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Strucure and mechnical properties of cold sprayed Ti-6Al-4V layer
Sabela, Jakub ; Zelený, Martin (referee) ; Řehořek, Lukáš (advisor)
Diploma thesis deals in the first part with recent knowledge of cold spray, its mechanism and parameters of deposition, advanced coatings made by cold spray and their applications, knowledge of Ti-6Al-4V coatings and their heat treatment. Deposit of Ti- 6Al-4V powder was made by cold spray process. In experimental part, microstructure and mechanical properties of supplied and its heat treated material were observed and examined. Mechanical properties and microstructure remained unchanged by annealing at 600 °C as in the case of supplied material. Recrystallization occured in microstructure of and phases by annealing at 800 °C. Grains were emerged in microstructure and mechanical properties were decreased. Mechanical properties were improved by annealing at 900 °C due to quenching. Microstructure consists of and ’ phases. Mechanical properties were the worst for annealed material at 1000 °C because of coarsed grains. Material which was annealed at 800 °C, quenched and precipitation hardened had the best microstructure and mechanical properties.
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Shape memory alloy
Sabela, Jakub ; Doležal, Pavel (referee) ; Němec, Karel (advisor)
The main aim is an overview of process in a shape memory metal-based materials. In the first part of the thesis, I commented on the issue of history and principle of shape memory materials. In the second part I have divided this materials by a structural point of view, dealing with the most widely used memory material in practice. I pointed out its advantages and disadvantages. Another part was devoted to the production, thermal and mechanical processing. Then I said the most used application in practice. Finally, I commented on the future shape memory materials.
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