Publication detail

Effect of gassing and solidification rate on structure, porosity and mechanical properties of AlSi9Cu3 alloy castings

ROUČKA, J. VEVERKA, A. DIVIŠ, V. ŇUKSA, P.

Czech title

Vliv naplynění a rychlosti tuhnutí na strukturu, porezitu a mechanické vlastnosti odlitků ze slitiny AlSi9Cu3

English title

Effect of gassing and solidification rate on structure, porosity and mechanical properties of AlSi9Cu3 alloy castings

Type

conference paper

Language

en

Original abstract

Test specimens of AlSi9Cu3 alloy cast in sand and metalic moulds were used to assess the extent of porosity in dependence on the gas content in the melt and on the solidification rate. On the basis of the dendrite arm spacing (DAS) the size of primary phases was evaluated and the mechanical properties of test pieces were measured. It has been proved that higher solidification rates contributes to greatly reduced porosity, smaller size of individual gas pores, finer structure, and higher strength and ductility of the alloy. The shape of pores is influenced by gas content significantly.

Czech abstract

Na vzorcích ze slitiny AlSi9Cu3, odlévané do pískových a do kovových forem byl sledován rozsah porezity v závislosti na naplynění taveniny a rychlosti tuhnutí. Velikost dendritů primární fáze byla hodnocena pomocí kriteria DAS, na zkušebních vzorcích byly zjišťovány mechanické vlastnosti. Bylo zjištěno, že při zvýšení rychlosti tuhnutí se snižuje rozsah porezity, zmenšuje se velikost plynových pórů, zjemňuje struktura a zvyšuje se pevnost slitiny. Tvar pórů je významně ovlivněn stupněm naplynění taveniny.

English abstract

Test specimens of AlSi9Cu3 alloy cast in sand and metalic moulds were used to assess the extent of porosity in dependence on the gas content in the melt and on the solidification rate. On the basis of the dendrite arm spacing (DAS) the size of primary phases was evaluated and the mechanical properties of test pieces were measured. It has been proved that higher solidification rates contributes to greatly reduced porosity, smaller size of individual gas pores, finer structure, and higher strength and ductility of the alloy. The shape of pores is influenced by gas content significantly.

Keywords in Czech

Naplynění, porezita, rychlost tuhnutí, vzdálenost sekundárních os dendritů, mechanické vlastnosti

Keywords in English

Porosity, cooling rate, dendrite arm spacing, mechanical properties

RIV year

2007

Released

10.10.2007

Publisher

Trasactions of the Universities of Košice

Location

Košice

Book

Aluminium 2007

Pages from–to

90–96

Pages count

7

BIBTEX


@inproceedings{BUT23256,
  author="Jaromír {Roučka} and Aleš {Veverka} and Vladimír {Diviš} and Petr {Ňuksa},
  title="Effect of gassing and solidification rate on structure, porosity and mechanical properties of AlSi9Cu3 alloy castings",
  booktitle="Aluminium 2007",
  year="2007",
  month="October",
  pages="90--96",
  publisher="Trasactions of the Universities of Košice",
  address="Košice"
}