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| rdf:type
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| Description
| - Melting was performed in zirconium crucible and the melt was cast into graphite or metallic mould. The samples prepared in this manner had shape of bars, cylinders or tubes. Selected castings were used for determination of structure characteristics.Ni3Al based alloys were prepared by method of gravity or centrifugal casting on different machines. Part of alloys was prepared by method of vacuum induction casting in various atmospheres. Method of centrifugal casting was verified for this type of alloys on two different machines. Material structure was investigated in cross and longitudinal sections, phase composition, micro-hardness and material porosity were determined. The values of micro-hardness in the samples that were so far tested do not show any significant differences. No substantial influence of micro-hardness occurred in gravity cast samples melted on air, either. This is a favourable finding, since effect of air atmosphere will probably not impair quality of the cast pieces. The alloys have very different contents of gases – oxygen and nitrogen. Higher contents of air oxygen were determined in all types of alloys melted and cast on air. It follows form results that material is highly susceptible, in contact with air, to absorb air oxygen. Properties of castings must be verified by mechanical tests also at increased temperatures. Chemical composition was verified by method of optical emission spectrometry. Method of centrifugal casting of products from Ni3Al based alloys is highly demanding and it is limited by numerous adverse effects.
- Melting was performed in zirconium crucible and the melt was cast into graphite or metallic mould. The samples prepared in this manner had shape of bars, cylinders or tubes. Selected castings were used for determination of structure characteristics.Ni3Al based alloys were prepared by method of gravity or centrifugal casting on different machines. Part of alloys was prepared by method of vacuum induction casting in various atmospheres. Method of centrifugal casting was verified for this type of alloys on two different machines. Material structure was investigated in cross and longitudinal sections, phase composition, micro-hardness and material porosity were determined. The values of micro-hardness in the samples that were so far tested do not show any significant differences. No substantial influence of micro-hardness occurred in gravity cast samples melted on air, either. This is a favourable finding, since effect of air atmosphere will probably not impair quality of the cast pieces. The alloys have very different contents of gases – oxygen and nitrogen. Higher contents of air oxygen were determined in all types of alloys melted and cast on air. It follows form results that material is highly susceptible, in contact with air, to absorb air oxygen. Properties of castings must be verified by mechanical tests also at increased temperatures. Chemical composition was verified by method of optical emission spectrometry. Method of centrifugal casting of products from Ni3Al based alloys is highly demanding and it is limited by numerous adverse effects. (en)
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| Title
| - Centrifugally cast alloy based on Ni3Al-structure characteristics
- Centrifugally cast alloy based on Ni3Al-structure characteristics (en)
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| skos:prefLabel
| - Centrifugally cast alloy based on Ni3Al-structure characteristics
- Centrifugally cast alloy based on Ni3Al-structure characteristics (en)
|
| skos:notation
| - RIV/61989100:27360/12:86084240!RIV13-TA0-27360___
|
| http://linked.open...avai/predkladatel
| |
| http://linked.open...avai/riv/aktivita
| |
| http://linked.open...avai/riv/aktivity
| - P(ED0040/01/01), P(TA01011128)
|
| http://linked.open...iv/cisloPeriodika
| |
| http://linked.open...vai/riv/dodaniDat
| |
| http://linked.open...aciTvurceVysledku
| |
| http://linked.open.../riv/druhVysledku
| |
| http://linked.open...iv/duvernostUdaju
| |
| http://linked.open...titaPredkladatele
| |
| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/61989100:27360/12:86084240
|
| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - microhardness; gas content; Ni3Al; centrifugal casting (en)
|
| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| |
| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| |
| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Kursa, Miroslav
- Malcharcziková, Jitka
- Pohludka, Martin
- Fridrich, R.
- Kaňák, D.
|
| issn
| |
| number of pages
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| http://localhost/t...ganizacniJednotka
| |
| is http://linked.open...avai/riv/vysledek
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