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Advantages of colour etching in quality control of recycled Al-Si cast alloys

Tillová Eva, Kuchariková Lenka, Chalupová Mária, Belan Juraj, Vaško Alan, Herčko Adrián

Quality Production Improvement - QPI

2019

Vol. 1, Iss. 1

296--303

Colour Metallography is a set of light metallographic microscopy methodologies that utilize phase colour contrast as a source of new structure information compared to conventional techniques. In many cases, colour contrast can be induced where no identifiable phase contrast is obtained by conventional techniques. With the help of colour contrast, we gain new information on the structure of Al-Si alloys, especially intermetallic phases, in which the benefits of its use in casting quality control are of benefit. Blue-yellow contrast is definitely more pronounced than dark grey or light grey contrast. There is no substantial reproducible colour reproduction, since it is irrelevant whether the two phases are distinguished by blue-yellow or green-ocher contrast. When using the colour contrast, the structural components differ not only according to their microscopic appearance, but also based on the knowledge of the chemical composition of alloys, interactions between structural components, knowledge of the possible influence of Al-alloys structure (e.g. refining, modifications, heat treatment). Colour contrast in quality control of Al-Si alloys was applied to AlSiMg cast alloy (AlSi7Mg0.3; AlSi7MgTi; AlSi10MgMn; etc.).

Nové poznatky o struktuře tvářené slitiny AlSi12CuMgNi (AA 4032)

Bajcura M., Michna Š., Lukáč I.

Archiwum Odlewnictwa

2006

R. 6, nr 18/1

131--136

Práce popisuje jednotlivé strukturální složky slévárenské slitiny AlSi12CuMgNi v tvářeném stavu, identifikované pomocí barevné metalografie a EDX mikroanalýzy. Výsledky jsou porovnávané s teoretickými poznatky o výskytu intermetalických sloučenin u dané slitiny.

The paper refers to particular structural components of wrought aluminium casting alloy AlSi12CuMgNi which is indentify by colour metalography and EDX microanalysis. The results are compared with theoretical experience about the intermetalic phases occurence in studied alloy.

Zastosowanie metalografii kolorowej i ilościowej do badań modyfikacji siluminów

Skocovsky P., Konecna R., Benko P.

Krzepnięcie Metali i Stopów

1998

nr 38

119--124

The color contrast was used at the study of influence of modifier quantity on the basis of strontium on the structure and properties of silumin AlSi10MgMn by the evaluation of structure and some intermetallic phases not identifyed by classic metallographic metods were resolved. The image analysis was used by the evaluation of morphology of fracture surface. On the basis of experimental works can be stated the marked correlation of quantitation microfractographic factors mechanical properties.