Publication detail

Influence of Silumine Casting Microstrukture on Component Failure Resistance

TVARŮŽEK, M. MACHKOVÁ, M. JANOVÁ, D.

Czech title

Influence of Silumine Casting Microstrukture on Component Failure Resistance

English title

Influence of Silumine Casting Microstrukture on Component Failure Resistance

Type

journal article - other

Language

en

Original abstract

The objective of this work is to define causes of reduced resistance to mechanical damage that had occurred for several types of castings. Macro- and micro-porosity, metallographis structure and presence and distribution of particular phases were investigated. Micro-analysis of phase composition was carried out. Based on the metallographic analysis, it is possible to assume that the structure of mechanically more resistant castings is more coarsely grained with larger alpha-phase aluminium surfaces and features ferrum only in the form of tiny angulate particles always accompanied by managanese. The structure of less resistant castings contains larger stellar-shaped particles of Al15(MnFe)3Si2 intermetallic phase, and more importantly, it has sharp, hard and brittle needles of Al5FeSi intermetalic phase, which dramatically deteriorate mechanical properties due to their notch effect.

Czech abstract

The objective of this work is to define causes of reduced resistance to mechanical damage that had occurred for several types of castings. Macro- and micro-porosity, metallographis structure and presence and distribution of particular phases were investigated. Micro-analysis of phase composition was carried out. Based on the metallographic analysis, it is possible to assume that the structure of mechanically more resistant castings is more coarsely grained with larger alpha-phase aluminium surfaces and features ferrum only in the form of tiny angulate particles always accompanied by managanese. The structure of less resistant castings contains larger stellar-shaped particles of Al15(MnFe)3Si2 intermetallic phase, and more importantly, it has sharp, hard and brittle needles of Al5FeSi intermetalic phase, which dramatically deteriorate mechanical properties due to their notch effect.

English abstract

The objective of this work is to define causes of reduced resistance to mechanical damage that had occurred for several types of castings. Macro- and micro-porosity, metallographis structure and presence and distribution of particular phases were investigated. Micro-analysis of phase composition was carried out. Based on the metallographic analysis, it is possible to assume that the structure of mechanically more resistant castings is more coarsely grained with larger alpha-phase aluminium surfaces and features ferrum only in the form of tiny angulate particles always accompanied by managanese. The structure of less resistant castings contains larger stellar-shaped particles of Al15(MnFe)3Si2 intermetallic phase, and more importantly, it has sharp, hard and brittle needles of Al5FeSi intermetalic phase, which dramatically deteriorate mechanical properties due to their notch effect.

Keywords in Czech

silumine, casting, impacte resistance, fatigue, porosity, intermetallic phases

Keywords in English

silumine, casting, impacte resistance, fatigue, porosity, intermetallic phases

RIV year

2009

Released

01.12.2009

Location

Česká Republika

ISSN

1211-877X

Journal

Letecký zpravodaj

Volume

2009

Number

2

Pages from–to

30–35

Pages count

6

BIBTEX


@article{BUT48556,
  author="Martin {Tvarůžek} and Miroslava {Machková} and Drahomíra {Janová},
  title="Influence of Silumine Casting Microstrukture on Component Failure Resistance",
  journal="Letecký zpravodaj",
  year="2009",
  volume="2009",
  number="2",
  month="December",
  pages="30--35",
  address="Česká Republika",
  issn="1211-877X"
}