The effect of preparation methods on a microstructure of the Ni3Al-based alloys alloyed with molybdenum

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F15%3A86096284" target="_blank" >RIV/61989100:27360/15:86096284 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The effect of preparation methods on a microstructure of the Ni3Al-based alloys alloyed with molybdenum

Popis výsledku v původním jazyce

A preparation of alloys based on the Ni3Al intermetallic compound alloyed with molybdenum by classical castings methods, such as an induction melting, is limited by a high melting point of molybdenum (2,623 °C). Decreasing of the melting point on the value of 1,417 °C was reached by a preparation of the Ni-15Mo (wt. %) master alloy by plasma metallurgy. The master alloy was used as an input material for a preparation of the Ni-7Al-14Mo (wt. %) alloy by an induction melting with a centrifugal casting. Castings of the Ni-7Al-14Mo alloy were directionally solidified in a resistance furnace working on the Bridgman method principle at the rates of 20 and 50 mm/h and the constant thermal gradient of 75 °C/cm. All experimental alloys were examined by a chemical and structural analysis. A matrix of the master alloy was homogeneous without precipitates and formed by the MoNi8 phase. Matrixes of the casting and directionally solidified rods of the Ni-7Al-14Mo alloy consisted of the Ni3Al phase and the solid solution of aluminum in nickel, mutually arranged as a mesh. There were small precipitates rich in molybdenum situated along grain boundaries. A structure of the casting and the directionally solidified rods was polycrystalline, but the grains of the directionally solidified rods were oriented in a growth direction of solidus-liquidus interface.

Název v anglickém jazyce

The effect of preparation methods on a microstructure of the Ni3Al-based alloys alloyed with molybdenum

Popis výsledku anglicky

A preparation of alloys based on the Ni3Al intermetallic compound alloyed with molybdenum by classical castings methods, such as an induction melting, is limited by a high melting point of molybdenum (2,623 °C). Decreasing of the melting point on the value of 1,417 °C was reached by a preparation of the Ni-15Mo (wt. %) master alloy by plasma metallurgy. The master alloy was used as an input material for a preparation of the Ni-7Al-14Mo (wt. %) alloy by an induction melting with a centrifugal casting. Castings of the Ni-7Al-14Mo alloy were directionally solidified in a resistance furnace working on the Bridgman method principle at the rates of 20 and 50 mm/h and the constant thermal gradient of 75 °C/cm. All experimental alloys were examined by a chemical and structural analysis. A matrix of the master alloy was homogeneous without precipitates and formed by the MoNi8 phase. Matrixes of the casting and directionally solidified rods of the Ni-7Al-14Mo alloy consisted of the Ni3Al phase and the solid solution of aluminum in nickel, mutually arranged as a mesh. There were small precipitates rich in molybdenum situated along grain boundaries. A structure of the casting and the directionally solidified rods was polycrystalline, but the grains of the directionally solidified rods were oriented in a growth direction of solidus-liquidus interface.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2015 : 24th International Conference on Metallurgy and Materials : conference proceedings : June 3rd-5th 2015, Hotel Voroněž I, Brno, Czech Republic, EU

ISBN

978-80-87294-62-8

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

6

Strana od-do

1619-1624

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

3. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000374706100263