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Cooling rate influence on microstructure of the Zn-Al cast alloy

Krupińska B., Dobrzański L., Labisz K., Rdzawski Z.

Archives of Materials Science and Engineering

2010

Vol. 43, nr 1

13-20

Purpose: In this work was presented the cooling rate influence on microstructure of the Zn-Al cast alloy. This research work presents also the investigation results of derivative thermoanalysis performed using the UMSA device. The material used for investigation was the ZnAl4Cu1 alloy. Design/methodology/approach: Moreover the analysis of cooling rate influence on the derivative curve changes was performed as a result of the measured crystallisation kinetic changes. For the assessment of the cooling rate influence on the mechanical properties also hardness measurements were performed using the Rockwell hardness device. Findings: The treated sample is without holes, cracks and defects as well as has a slightly higher hardness value compared to the as-cast material. Research limitations/implications: The material was examined metallographically and analyzed qualitatively using light and scanning electron microscope as well as the area mapping and point-wise EDS microanalysis. The performed investigation are discussed for the reason of an possible improvement of thermal and structural properties of the alloy. Practical implications: The investigated material can find its use in the foundry industry; an improvement of component quality depends mainly on better control over the production parameters. Originality/value: This work provides better understanding of the thermal characteristics and processes occurred in the new developed alloy. The achieved results can be used for liquid metal processing in science and industry and obtaining of a required alloy microstructure and properties influenced by a proper production conditions.

Derivative thermo analysis of the Al-Si cast alloy with addition of rare earths metals

Krupiński M., Labisz K., Dobrzański L. A., Rdzawski Z.

Archives of Foundry Engineering

2010

Vol. 10, iss. 1

79-82

In this paper the dependence between chemical composition, structure and cooling rate of Al-Si aluminium cast alloy was investigated. For studying of the structure changes the thermo-analysis was carried out, using the UMSA (Universal Metallurgical Simulator and Analyzer) device. For structure investigation optical and electron scanning microscopy was used, phase and chemical composition of the Al cast alloy also using qualitative point-wise EDS microanalysis.

Derivative thermo analysis of the near eutectic Al-Si-Cu alloy

Dobrzański L. A., Krupiński M., Labisz K.

Archives of Foundry Engineering

2008

Vol. 8, iss. 4

37-40

For determining of the dependence between cooling Speer, chemical composition and structure of the Al-Si-Cu aluminium cast alloy the thermo-analysis was carried out, using the UMSA device (Universal Metallurgical Simulator and Analyzer), next the optical and electron scanning microscopy was used for investigation of the structure, phase and chemical composition of the AC-AlSi7Cu3Mg grade Al cast alloy also using the EDS microanalysis as well the EBSD technique.