Microstructure of Ni-22Al-1Zr and Ni-22Al-2Zr alloys after directional solidification

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure of Ni-22Al-1Zr and Ni-22Al-2Zr alloys after directional solidification

Popis výsledku v původním jazyce

Ni-22Al-1Zr and Ni-22Al-2Zr alloys (at. %) were prepared by vacuum induction melting. The alloys were directionally re-melted in a resistance furnace working with use of the Bridgman?s method. The re-melted samples were transversally and longitudinally cut and microstructure, porosity and microhardness were investigated on the sections. The structure of both alloys was oriented after directional solidification. It consisted of coarse grains of Ni3Al phase, in which the eutectic was distributed. The eutectic was a complex of lamellas of Ni3Al and Ni7Zr2 phases. Porosity of re-melted samples was smaller than porosity of castings. Furthermore, porosity of samples increased with rate of directional solidification. There was no significant difference between the values of microhardness for transversal and longitudinal sections of both alloys. Their average values were approximately 270 HV 0.05. That has confirmed that the largest microhardness had the eutectic with zirconium.

Název v anglickém jazyce

Microstructure of Ni-22Al-1Zr and Ni-22Al-2Zr alloys after directional solidification

Popis výsledku anglicky

Ni-22Al-1Zr and Ni-22Al-2Zr alloys (at. %) were prepared by vacuum induction melting. The alloys were directionally re-melted in a resistance furnace working with use of the Bridgman?s method. The re-melted samples were transversally and longitudinally cut and microstructure, porosity and microhardness were investigated on the sections. The structure of both alloys was oriented after directional solidification. It consisted of coarse grains of Ni3Al phase, in which the eutectic was distributed. The eutectic was a complex of lamellas of Ni3Al and Ni7Zr2 phases. Porosity of re-melted samples was smaller than porosity of castings. Furthermore, porosity of samples increased with rate of directional solidification. There was no significant difference between the values of microhardness for transversal and longitudinal sections of both alloys. Their average values were approximately 270 HV 0.05. That has confirmed that the largest microhardness had the eutectic with zirconium.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

18th International Student's Day of Metallurgy : proceedings

ISBN

978-3-200-02155-6

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

265-269

Název nakladatele

ASMET, Austrian Society for Metallurgy and Materials

Místo vydání

Knittelfeld,

Místo konání akce

Leoben

Datum konání akce

17. 3. 2011

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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