National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
Design of a suitable shape of test bars used for HCF (high cycle fatigue) and LCF (low cycle fatigue) and elimination of internal defects for reduction of their influence
Hemala, Robert ; Šustek, Petr (referee) ; Ňuksa, Petr (advisor)
The topic of this thesis is the formation of microporosity in cast test bars of nickel-base superalloy Inconel 713LC during solidification. The theoretical part consists of nickel alloys, their macrostructure, the method of casting and crystallization of nickel-based superalloys. The second part is devoted to the design of casting conditions, the production of shell molds, the size and shape of grains, evaluation of microporosity by various available methods, comparing the influence of grain size and the proportion of microporosity on the resulting values of the mechanical tests. Experiments were carried out in cooperation with PBS Velká Bíteš and ÚST foundry department.
System of non-destructive control in steel foundries
Hemala, Robert ; Cupák, Petr (referee) ; Čech, Jaroslav (advisor)
This thesis deals with the control system of steel castings in the foundry industry with emphasis on non-destructive testing. Sees the entire review process from casting to expedition. The thesis contains the various courses of the basic controls and non-destructive testing methods used in foundry steel castings.
Design of a suitable shape of test bars used for HCF (high cycle fatigue) and LCF (low cycle fatigue) and elimination of internal defects for reduction of their influence
Hemala, Robert ; Šustek, Petr (referee) ; Ňuksa, Petr (advisor)
The topic of this thesis is the formation of microporosity in cast test bars of nickel-base superalloy Inconel 713LC during solidification. The theoretical part consists of nickel alloys, their macrostructure, the method of casting and crystallization of nickel-based superalloys. The second part is devoted to the design of casting conditions, the production of shell molds, the size and shape of grains, evaluation of microporosity by various available methods, comparing the influence of grain size and the proportion of microporosity on the resulting values of the mechanical tests. Experiments were carried out in cooperation with PBS Velká Bíteš and ÚST foundry department.
System of non-destructive control in steel foundries
Hemala, Robert ; Cupák, Petr (referee) ; Čech, Jaroslav (advisor)
This thesis deals with the control system of steel castings in the foundry industry with emphasis on non-destructive testing. Sees the entire review process from casting to expedition. The thesis contains the various courses of the basic controls and non-destructive testing methods used in foundry steel castings.

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