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Effect of cooling rate on the solidification behaviour of MC MgAl6Zn1 alloy

Dobrzański L. A., Król M., Tański T., Maniara R.

Journal of Achievements in Materials and Manufacturing Engineering

2009

Vol. 37, nr 1

65-69

Purpose: The goal of this paper is to present the thermal characteristics of magnesium alloy using the novel Universal Metallurgical Simulator and Analyzer Platform. Design/methodology/approach: The objective of this work is determine the liquidus, solidus temperature and beginning nucleation temperature to understanding crystallization of magnesium alloys. Findings: The research show that the thermal analysis carried out on UMSA Technology Platform is an efficient tool for collect and calculate thermal parameters. It was determined that the higher solidification rate decreases the solidus temperature. In addition, it was observed that the beginning of nucleation of .(Mg)-ß(Mg-Mg17Al12) eutectic temperature constituent increases when the solidification rate increases. Research limitations/implications: This paper presents results for one alloy – MC MgAl6Zn1 only, cooled with three different solidifications rate i.e. 0.6, 1.2 and 2.4oC/s, for assessment for the liquidus, solidus temperatures and describe a beginning of nucleation of .(Mg)-ß(Mg-Mg17Al12) eutectic. Practical implications: The parameters described can be applied in metal casting industry for selecting magnesium ingot preheating temperature for semi solid processing to achieve requirements properties or to predict how to prepare parameters to heat treatment. Originality/value: The paper contributes to better understanding and recognition an influence of different solidification condition on non-equilibrium thermal parameters of magnesium alloys.

Effect of cooling rate on the solidification behavior of MC MgAl6Zn1 alloy

Dobrzański L. A., Król M., Tański T., Maniara R.

Archives of Materials Science

2008

Vol. 29, nr 3

110-117

In this work effect of cooling rate on thermal characteristic results of MC MgAl6Zn1 cast alloy have been described. The solidification process was studied using the cooling curve and crystallization curve at solidification rate ranging from 0.6 degree C/s up to 2.4 degree C/s. It was determined that the higher solidification rate decreases the solidus temperature. In addition, it was observed that the beginning of nucleation of alpha(Mg)-betha(Mg-Mg17Al12) eutectic temperature constituent increases when the solidification rate increases.