Relevant bibliographies by topics / Hyper duplexní korozivzdorná ocel

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Academic literature on the topic 'Hyper duplexní korozivzdorná ocel'

Author: Grafiati
Published: 28 June 2021
Last updated: 8 February 2022

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Dissertations / Theses on the topic "Hyper duplexní korozivzdorná ocel"

1

Kaněra, Miloš. "Výroba odlitků z austeniticko-feritických hyperduplexních korozivzdorných ocelích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-445174.

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The thesis deals with hyper duplex stainless austenitic-ferritic steels and their mechanical and castability properties. The evaluation of resistance to pitting corrosion is divided by PRE values. Steels with a PRE value higher than 48 belong to the group of hyper duplex steels. The theoretical part contains an introduction to the chemical composition, structure and properties of these steels. The practical part is focused on the conditions of tendency to crack castings during solidification and cooling. Furthermore, there is evaluated influence of intermetallic phases on mechanical properties.
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Nejedlý, Zdeněk. "Mechanické a technologické vlastnosti duplexních ocelí v závislosti na hodnotě PREN." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231634.

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This thesis deals with stainless austenitic-ferritic (duplex) steels and their mechanical and technological properties. The first part focuses on introducing these high-alloy materials. The second part describes the influence of chemical composition on the mechanical properties, technological properties and steel structure. There was also observed the effect of heat treatment and steel melting under reduced pressure.
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3

Buček, Petr. "Využití techniky orientovaných fólií v TEM." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228855.

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The master’s thesis is focused on the application of the technique of oriented foils in transmission electron microscopy. Dislocation structures were identified by this technique in both phases of polycrystalline austenitic-ferritic stainless steel SAF 2507 formed during low cycle fatigue at two plastic strain amplitudes ap. In individual grains the stress axis and the Schmid factors of active slip systems were determined. In austenitic grains, the planar structures were determined at both ap. In ferritic grains, the dislocation arrangement was different for the two observed ap. Individual screw dislocations and pile-up´s of edge dislocations were found at low ap = 1x10-4. Mixture of vein and wall dislocation structures were formed at high ap = 2x10-3. Observed dislocation structures were discussed in relation with the cyclic plastic response of the duplex stainless steel.
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4

Jakubčíková, Lucie. "Návrh technologie a ověření výroby malých ocelových ingotů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401512.

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The thesis deals with the design of ingots from duplex (austenitic-ferritic) stainless steels in terms of minimal occurrence of axial porosity. The optimal shape and dimension of the ingot and the casting conditions are determined based on numerical simulations. The resulting internal quality of the realized ingot is evaluated. The presence of shrinkage porosity is determined by penetrant testing. The degree of chemical heterogeneity, the extent of macrosegregation, of selected elements in given ingot locations is measured by an optical emission spectrometer. Segregation values are compared with simulation results. The micro-purity of the ingot is assessed on the basis of metallographic samples.
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5

Valenta, Pavel. "Vliv chemického složení oceli na strukturu a vlastnosti korozivzdorných ocelí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230532.

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The thesis is focused on high-alloy austenitic and austenitic-ferritic (duplex) steel. The theoretical part includes research about high-alloy steels and basic introduction to this issue. In the practical part of the test there were casted refractory austenitic steel 30CH3N17G2L, duplex stainless steel 1.4462, low carbon steel and high carbon steel. On the castings of austenitic steel were made mechanical and technological tests. There were evaluated the effects of different casting temperature and casting wall thickness to the microstructures and macrostructures of steel, tensile strength and charpy impact tests. The technological tests compared technological properties of these steels.
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6

Stejskal, Marek. "Vliv chemického složení a tepelného zpracování na strukturu a vlastnosti dvoufázových austeniticko-feritických korozivzdorných ocelí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382114.

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This thesis focused on austenitic-ferritic (duplex) stainless steels and their mechanical and technological properties. The theoretical part includes introduction to chemical composition, structure, heat treatment and properties of these steels. The practical part focuses on influence of casting temperature on technological properties of ASTM A890 Gr4A stainless duplex steel. Furthermore, there is evaluated influence of chemical composition and heat treatment on structure and mechanical properties of different duplex stainless steels.
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7

Tučková, Eva. "Výroba dvoufázových austeniticko-feritických korozivzdorných ocelí s využitím vakuové metalurgie." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382125.

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