Microstructure and mechanical properties of C355.0 cast aluminium alloy

• Autorzy: Mrówka-Nowotnik G. , Sieniawski J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main task of this work was to study the solidification process through analysis of the DSC curves that were obtained at solidification rate of 5 K/min. During C355.0 alloy solidification an amount of different intermetallic phases may form. Their volume fraction, chemical composition and morphology exert significant influence on a technological and mechanical properties of the aluminium alloys. Therefore the examination and identification of intermetallic phases in examined alloy is very important part of complex investigation. In this research the effect of precipitation hardening process on the microstructure and mechanical properties of C355.0 alloy has also been investigated. Design/methodology/approach: To study the solidification process differential scanning calorimetry (DSC) was used. Hardness measurements have been utilized to examined the effect of a precipitation hardening (T6) on the mechanical properties. The plastic and mechanical properties were evaluated by uniaxial tensile test at room temperature. To identify intermetallics in C355.0 alloy optical light microscopy (LM), X-ray diffraction (XRD), scanning (SEM) and transmission (TEM) electron microscope were used. Findings: The results show that the as-cast microstructure of C355.0 alloy after slow solidification at a cooling rate 5K/min, consisted a wide range of intermetallics phases. The microstructure of investigated C355.0 alloy included: â-Al5FeSi, á-Al12(FeMn)3Si, Al2Cu, Q-Al5Cu2Mg8Si6, Si and Mg2Si phases. Significant changes in as-cast microstructure and mechanical properties followed after artificial aging due to a precipitation strengthening process were observed. Practical implications: The aim of this work was to analyze the solidification process and how T6 heat treatment influenced the microstructure and mechanical properties of C355.0 alloy. Additionaly this paper proposes the best experimental techniques for analysis of the intermetallic phases occurring in the cast and T6 condition. Originality/value: The paper has provided essential data about influence of solidification process and aging parameters on the microstructure and mechanical properties of C355.0 alloys.

Słowa kluczowe

EN

metallic alloys; heat treatment; mechanical properties

PL

stopy metali; obróbka cieplna; właściwości mechaniczne

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2011
• Tom: Vol. 47, nr 2
• Strony: 85--94
• Opis fizyczny: Bibliogr. 34 poz.

Twórcy

autor

Mrówka-Nowotnik G.

autor

Sieniawski J.

• Department of Materials Science, Rzeszów University of Technology, ul. W. Pola 2, 35-959 Rzeszów, Poland,

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