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National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Analysis of different ways/speed of cooling Al casings during their solidification and influence to the mechanical properties, structure and dendrite arm spacing of the final castings
 Holčapek, Jiří ; Vašťák, Patrik (referee) ; Horáček, Milan (advisor)
This master´s thesis deals with finding the best way to cool a ceramic shell mould during solidification of the melt to achieve the requiered values of mechanical propeties. During the experimental part we tried different cooling methods. This involved blowing the shell with compressed air, submerge in water and wetting in a quenching polymer solutions at different speeds. The best way reaching the highest values of machanical properties was chosen the method of rapid submerge of the shell mould in a solution of quenching polymer of a specific concentration. The mechanical properties have been achieved.
Detailed record
Analysis of the Structure and Properties of Al-Si Alloy during Holding Time of the Melt
 Krahula, Karel ; Lichý, Petr (referee) ; Kaňa, Václav (referee) ; Zemčík, Ladislav (advisor)
This thesis is dedicated to the production of aluminum casting alloys. It maps the course of changes in the morphology of eutectic and its influence on mechanical properties during the long-term meltdown. In particular, the use of image analysis methods contributes to describing these processes. The presented results show that the eutectic shape does not change even during the meltdown for 110 minutes. There is only a roughing and an increase in grain size. There was also no influence on the mechanical properties that fit the practical application of the alloy examined
Detailed record
Analysis of different ways/speed of cooling Al casings during their solidification and influence to the mechanical properties, structure and dendrite arm spacing of the final castings
 Holčapek, Jiří ; Vašťák, Patrik (referee) ; Horáček, Milan (advisor)
This master´s thesis deals with finding the best way to cool a ceramic shell mould during solidification of the melt to achieve the requiered values of mechanical propeties. During the experimental part we tried different cooling methods. This involved blowing the shell with compressed air, submerge in water and wetting in a quenching polymer solutions at different speeds. The best way reaching the highest values of machanical properties was chosen the method of rapid submerge of the shell mould in a solution of quenching polymer of a specific concentration. The mechanical properties have been achieved.
Detailed record
Analysis of the Structure and Properties of Al-Si Alloy during Holding Time of the Melt
 Krahula, Karel ; Lichý, Petr (referee) ; Kaňa, Václav (referee) ; Zemčík, Ladislav (advisor)
This thesis is dedicated to the production of aluminum casting alloys. It maps the course of changes in the morphology of eutectic and its influence on mechanical properties during the long-term meltdown. In particular, the use of image analysis methods contributes to describing these processes. The presented results show that the eutectic shape does not change even during the meltdown for 110 minutes. There is only a roughing and an increase in grain size. There was also no influence on the mechanical properties that fit the practical application of the alloy examined
Detailed record

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