National Repository of Grey Literature 9 records found  Search took 0.01 seconds. 
Basic methods of influencing the aluminum alloys structures
Janský, Vojtěch ; Kaňa, Václav (referee) ; Blažík, Petr (advisor)
The goal of this thesis is to deal with common ways influencing of structure of aluminium alloys. Thesis deals with speed of cooling, inoculation and modification. The experimental part compares photos of samples of different castings and influece of already mentioned ways of influencing of structure during solidification.
Methods of primary influencing steel and steel ingot structures
Stejskal, Marek ; Záděra, Antonín (referee) ; Blažík, Petr (advisor)
This bachelor thesis is focused on the ways of influencing metal structure during it’s solidification in the mold that leads to changes in mechanical properties. In the first part there is explained the principle of metal crystalization, it’s types and mechanisms, there is also described the issue of metal solidification in the mold. In the second part of the thesis there is a general view of methods being used for primal influencing of steel structure. The principles and ways of use for these methods in foundry industry are explained.
Influence of modification and inoculation on structure and mechanical properties of aluminium alloys
Janošťák, Jan ; Lána, Ivo (referee) ; Roučka, Jaromír (advisor)
This thesis examines the influence of inoculation and modification on the internal structure and properties of aluminium-silicon alloys. The effect of inoculation by titanium and boron and modification by sodium and strontium is investigated in experimental part of the thesis. All these metallurgical interventions in the melt are tested on three types of hypoeutectic Al-Si alloys (AlSi10Mg(a), AlSi8Cu3, AlSi7Mg0,3). The experiment was carried out in cooperation with the foundry of non-ferrous metals, Aluminium Group, a.s. in Sloup.
GRAIN REFINEMENT EFFECT ON FATIGUE PROPERTIES OF AUSTENITIC STAINLESS STEEL WITH DEFORMATION INDUCED MARTENSITE FORMATION
Chlupová, Alice ; Man, Jiří ; Polák, Jaroslav ; Škorík, Viktor ; Karjalainen, J.
Fatigue properties of metastable austenitic 301LN steel with coarse and ultrafine-grained microstructures were investigated at ambient temperature and the effect of grain refinement was evaluated. Two different microstructural states of material were introduced by different annealing conditions during special thermo-mechanical treatment. Fatigue life curves were obtained and compared for both coarse-grained and ultra-fine-grained states of austenitic stainless steel. Magnetic measurements before, during and after cyclic loading were performed to reveal structural changes, i.e. formation of deformation-induced martensite. Relationship between microstructure refinement, phase composition and fatigue properties was discussed.
Methods of primary influencing steel and steel ingot structures
Stejskal, Marek ; Záděra, Antonín (referee) ; Blažík, Petr (advisor)
This bachelor thesis is focused on the ways of influencing metal structure during it’s solidification in the mold that leads to changes in mechanical properties. In the first part there is explained the principle of metal crystalization, it’s types and mechanisms, there is also described the issue of metal solidification in the mold. In the second part of the thesis there is a general view of methods being used for primal influencing of steel structure. The principles and ways of use for these methods in foundry industry are explained.
Basic methods of influencing the aluminum alloys structures
Janský, Vojtěch ; Kaňa, Václav (referee) ; Blažík, Petr (advisor)
The goal of this thesis is to deal with common ways influencing of structure of aluminium alloys. Thesis deals with speed of cooling, inoculation and modification. The experimental part compares photos of samples of different castings and influece of already mentioned ways of influencing of structure during solidification.
Influence of modification and inoculation on structure and mechanical properties of aluminium alloys
Janošťák, Jan ; Lána, Ivo (referee) ; Roučka, Jaromír (advisor)
This thesis examines the influence of inoculation and modification on the internal structure and properties of aluminium-silicon alloys. The effect of inoculation by titanium and boron and modification by sodium and strontium is investigated in experimental part of the thesis. All these metallurgical interventions in the melt are tested on three types of hypoeutectic Al-Si alloys (AlSi10Mg(a), AlSi8Cu3, AlSi7Mg0,3). The experiment was carried out in cooperation with the foundry of non-ferrous metals, Aluminium Group, a.s. in Sloup.
Grain refinement effect on fatigue properties of austenitic stainless steel with deformation induced martensite formation
Chlupová, Alice ; Man, Jiří ; Polák, Jaroslav ; Škorík, Viktor ; Karjalalinen, L.P.
Fatigue properties of metastable austenitic 301LN steel with coarse and ultrafine-grained microstructures were investigated at ambient temperature and the effect of grain refinement was evaluated. Two different microstructural states of material were introduced by different annealing conditions during special thermomechanical treatment. Fatigue life curves were obtained and compared for both coarse-grained and ultrafine- grained states of austenitic stainless steel. Magnetic measurements before, during and after cyclic loading were performed to reveal structural changes, i.e. formation of deformation-induced martensite. Relationship between microstructure refinement, phase composition and fatigue properties was discussed.
Structure and properties of ultrafine-grained aluminium alloys prepared by severe plastic deformation (ECAP)
Dám, Karel ; Jäger, Aleš ; Lejček, Pavel
The aim of this work is to find the dependence between Equal-Channel Angular Pressing (ECAP) processing conditions and final microstructure of aluminium alloys based on Al-Mg-Sc.

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