Detail publikace

Fraktografie kompozitů (MMC) vyrobených difuzí Ni do Al

KLAKURKOVÁ, L. KREJČÍ, J. ŠVEJCAR, J. MILIČKA, K.

Český název

Fraktografie kompozitů (MMC) vyrobených difuzí Ni do Al

Anglický název

Fractography of MMC produced by difusion of Ni into Al

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

en

Originální abstrakt

The specimens were prepared by diffusion of Ni from plasma-sprayd coating into the Al substrate at 630oC. Specimens with different fraction of Al-Ni intermetallic particles and eventually of eutectic Al+Al3Ni were prepared. Mechanical properties of these specimens were tested at room temperature (tensil tests) and higher temperatures (creep tests at 200 – 400oC). Ligh microscopy, image analysis, SEM and EDS microanalysis were been concluded that at room temperature "weak" structure elements are the particles of Al3Ni intermetallic compound. Due to their "premature" fracture, the deformation properties (e.g., elongation) deteriorate considerably. The increase of strength characteristics is thus counteralanced by drop of plasticity. Creep test, on the other hand, showed improvement of creep characteristics (creep rate, creep strength) at low stresses.The fracture is ductile with discontinuites at interfaces between different structural elements (particles/matrix or layers of eutectics/pure Al).

Český abstrakt

Vzorky byly připraveny pomocí difúze Ni z plasmaticky naneseného povlaku do hliníkového substrátu při 630oC. Tímto způsobem byly připraveny vzorky s různým objemovým podílem intermetalické fáze Ni-Al, případně eutektika Al + Ni3Al. Na těchto vzorcích byly zkoumány mechanické vlastnosti – při pokojové teplotě zkouška tahem, – při vyšších teplotách (200 – 400oC) pak creepová zkouška. Pro zkoumání jemných strukturních elementů bylo použito světelné mikroskopie, obrazové analýzy a SEM a EDS mikroanalýzy.

Anglický abstrakt

The specimens were prepared by diffusion of Ni from plasma-sprayd coating into the Al substrate at 630oC. Specimens with different fraction of Al-Ni intermetallic particles and eventually of eutectic Al+Al3Ni were prepared. Mechanical properties of these specimens were tested at room temperature (tensil tests) and higher temperatures (creep tests at 200 – 400oC). Ligh microscopy, image analysis, SEM and EDS microanalysis were been concluded that at room temperature "weak" structure elements are the particles of Al3Ni intermetallic compound. Due to their "premature" fracture, the deformation properties (e.g., elongation) deteriorate considerably. The increase of strength characteristics is thus counteralanced by drop of plasticity. Creep test, on the other hand, showed improvement of creep characteristics (creep rate, creep strength) at low stresses.The fracture is ductile with discontinuites at interfaces between different structural elements (particles/matrix or layers of eutectics/pure Al).

Klíčová slova anglicky

composite, fracture, Al alloy, creep, tensile test, fractography

Vydáno

25.04.2001

Nakladatel

Hutnická fakulta Technickem univerzity v Hošiciach v spolupráci s Ústavom materiálového výškumu SAV v Košiciach

Místo

Stará Lesná, High Tatra Mountains, Poprad, Slovak republic

ISBN

80-7099-324-3

Kniha

Metallography 01

Strany od–do

118–121

Počet stran

4

BIBTEX


@inproceedings{BUT24507,
  author="Lenka {Klakurková} and Jan {Krejčí} and Jiří {Švejcar} and Karel {Milička},
  title="Fractography of MMC produced by difusion of Ni into Al",
  booktitle="Metallography 01",
  year="2001",
  month="April",
  pages="118--121",
  publisher="Hutnická fakulta Technickem univerzity v Hošiciach v spolupráci s Ústavom materiálového výškumu SAV v Košiciach",
  address="Stará Lesná, High Tatra Mountains, Poprad, Slovak republic",
  isbn="80-7099-324-3"
}