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Nickel alloys in aerospace
Šprincl, Jan ; Nopová, Klára (referee) ; Němec, Karel (advisor)
The aerospace industry is one of the fastest growing industries today. Increasing demands on the efficiency and fuel consumption of jet engines can be met, among other things, by using higher quality materials, which clearly include nickel-based superalloys, which can meet these demands. This work provides an overview of these materials: both the building block of the whole structure - nickel, superalloys in general, and especially those nickel-based. It deals with the composition of the microstructure formed by the austenitic matrix ( phases) most often cured by carbide or substitution precipitates, unique mechanical properties, but also the influence of high temperatures and creep on the degradation of these properties. The work also includes a comparison of selected superalloys from different perspectives, especially according to the type of particles that cure the matrix or the effect of loading on the superalloy in the presence of thermal oxidation environment. Depending on the area of application, these materials are predestined for further future development and improvement, because their unique properties in areas with extreme conditions are irreplaceable for the time being.
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Microstructure of Mg alloys prepared by SLM process
Handl, Jiří ; Vašáková, Kristýna (referee) ; Nopová, Klára (advisor)
The main aim of this bachelor thesis was to research for theoretical part dealing with additive manufacturing and magnesium alloys focused on alloy AZ91D. The experimental work analyzed samples processed by Selective laser melting (SLM) technology with different process parameters. The porosity was measured on the individual samples and the microstructure of alloy AZ91D processed by SLM method was described. The results were linked to the process parameters used and, also to the available literature.
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Mechanical properties of materials prepared by SLM process
Nopová, Klára ; Štěpánek, Roman (referee) ; Pantělejev, Libor (advisor)
The final thesis determined the properties of alloys formed from mixtures of powders processed by the SLM method. Powders of alloy AlSi12 and EN AW 2618 were fused in the proportion 75 wt. % AlSi12 + 25 wt. % 2618, 50 wt. % AlSi12 + 50 wt. % 2618 and 25 wt. % AlSi12 + 75 wt. % 2618. Metallographic analysis, EBSD analysis and line EDS microanalysis were made on the samples. Tensile test at room temperature and hardness were carried out to determine the mechanical properties. Fractographic analysis was performed after tensile test.
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Microstructure of AlSi9Cu3 alluminium alloy processed by SLM technology
Rychnovský, Daniel ; Nopová, Klára (referee) ; Vašáková, Kristýna (advisor)
This bachelor thesis deals with microstructure of aluminium alloy AlSi9Cu3 produce by SLM process. In theoretical part the SLM process is shown. In following topic, the defects which can occur during SLM are mentioned. In the end of the theoretical part the materials made by SLM and materials made by conventional method (casting) are compared. In experimental part the porosity of the samples made by SLM is examined by image analysis. The examine of the microstructure is also included. Results are discussed with literature.
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Nickel alloys in aerospace
Šprincl, Jan ; Nopová, Klára (referee) ; Němec, Karel (advisor)
The aerospace industry is one of the fastest growing industries today. Increasing demands on the efficiency and fuel consumption of jet engines can be met, among other things, by using higher quality materials, which clearly include nickel-based superalloys, which can meet these demands. This work provides an overview of these materials: both the building block of the whole structure - nickel, superalloys in general, and especially those nickel-based. It deals with the composition of the microstructure formed by the austenitic matrix ( phases) most often cured by carbide or substitution precipitates, unique mechanical properties, but also the influence of high temperatures and creep on the degradation of these properties. The work also includes a comparison of selected superalloys from different perspectives, especially according to the type of particles that cure the matrix or the effect of loading on the superalloy in the presence of thermal oxidation environment. Depending on the area of application, these materials are predestined for further future development and improvement, because their unique properties in areas with extreme conditions are irreplaceable for the time being.
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|
|
Microstructure of Mg alloys prepared by SLM process
Handl, Jiří ; Vašáková, Kristýna (referee) ; Nopová, Klára (advisor)
The main aim of this bachelor thesis was to research for theoretical part dealing with additive manufacturing and magnesium alloys focused on alloy AZ91D. The experimental work analyzed samples processed by Selective laser melting (SLM) technology with different process parameters. The porosity was measured on the individual samples and the microstructure of alloy AZ91D processed by SLM method was described. The results were linked to the process parameters used and, also to the available literature.
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|
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Microstructure of AlSi9Cu3 alluminium alloy processed by SLM technology
Rychnovský, Daniel ; Nopová, Klára (referee) ; Vašáková, Kristýna (advisor)
This bachelor thesis deals with microstructure of aluminium alloy AlSi9Cu3 produce by SLM process. In theoretical part the SLM process is shown. In following topic, the defects which can occur during SLM are mentioned. In the end of the theoretical part the materials made by SLM and materials made by conventional method (casting) are compared. In experimental part the porosity of the samples made by SLM is examined by image analysis. The examine of the microstructure is also included. Results are discussed with literature.
|
|
|
Mechanical properties of materials prepared by SLM process
Nopová, Klára ; Štěpánek, Roman (referee) ; Pantělejev, Libor (advisor)
The final thesis determined the properties of alloys formed from mixtures of powders processed by the SLM method. Powders of alloy AlSi12 and EN AW 2618 were fused in the proportion 75 wt. % AlSi12 + 25 wt. % 2618, 50 wt. % AlSi12 + 50 wt. % 2618 and 25 wt. % AlSi12 + 75 wt. % 2618. Metallographic analysis, EBSD analysis and line EDS microanalysis were made on the samples. Tensile test at room temperature and hardness were carried out to determine the mechanical properties. Fractographic analysis was performed after tensile test.
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